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Öğe Carbazole-based organic dye sensitizers for efficient molecular photovoltaics(Elsevier Science Bv, 2010) Zafer, Ceylan; Gultekin, Burak; Ozsoy, Cihan; Tozlu, Cem; Aydin, Banu; Icli, SiddikEfficient dye sensitizers N,N'-dialkylcarbazolocarbazole derivatives BG-501 and BG-502 were synthesized and characterized. UV-vis, 1H NMR and CV were used for the structural characterization. The aim of the synthesis of these molecules is to improve some optical and electronic properties such as molar absorption coefficient, spectral coverage and electron injection properties of the sensitizers. Conjugated organic dyes exhibit higher molar extinction coefficients which allow harvesting more light in thinner semiconductor layer. Carbazole derivative dyes are well known in the literature with their thermal and photochemical stabilities and improved electron donor properties. We have achieved promising photovoltaic conversion efficiencies with new dyes BG-501 and BG-502 under standard conditions (AM1.5G, 100 mW. cm(-2) light intensity). The conversion efficiencies of solar cells are eta:3.18% and eta:2.49% with ionic liquid-based electrolyte for BG-501 and BG-502. respectively. (C) 2009 Elsevier B.V. All rights reserved.Öğe Charge transfer through amino groups-small molecules interface improving the performance of electroluminescent devices(Elsevier Science Bv, 2016) Havare, Ali Kemal; Can, Mustafa; Tozlu, Cem; Kus, Mahmut; Okur, Salih; Demic, Serafettin; Demirak, Kadir; Kurt, Mustafa; Icli, SiddikA carboxylic group functioned charge transporting was synthesized and self-assembled on an indium tin oxide (ITO) anode. A typical electroluminescent device [modified ITO/TPD (50 nm)/Alq(3) (60 nm)/LiF (2 nm)/(120 nm)] was fabricated to investigate the effect of the amino groups-small molecules interface on the characteristics of the device. The increase in the surface work function of ITO is expected to facilitate the hole injection from the ITO anode to the Hole Transport Layer (HTL) in electroluminescence. The modified electroluminescent device could endure a higher current and showed a much higher luminance than the nonmodified one. For the produced electroluminescent devices, the I-V characteristics, optical characterization and quantum yields were performed. The external quantum efficiency of the modified electroluminescent device is improved as the result of the presence of the amino groups-small molecules interface. (C) 2016 Elsevier B.V. All rights reserved.Öğe Comparative study of arylene bisimides substituted with imidazole side group for different dielectrics on the OFET application(Elsevier Science Sa, 2013) Tozlu, Cem; Erten-Ela, Sule; Singh, Th. Birendra; Sariciftci, N. Serdar; Icli, SiddikWe analyzed the effect of polymeric dielectric with hydroxyl and hydroxyl-free group on current-voltage characteristics of organic thin film transistor by the use of benzimidazole-derived arylene bisimide derivatives. Polyvinyl alcohol (PVA) with polar group and benzocyclobutene (BCB) with non-polar group were used as solution processed dielectric materials to compare with each other in thin film transistor application. The hydroxyl group has a significant effect on turn-on voltage and turn-off current in depletion regime due to hydroxyl group. It is observed that the surface morphology is influenced by the chemical structure of polymeric dielectric concerning surface energy. The electron field effect mobility of both arylene bisimides is enhanced by decreased surface energy of dielectric. The highest mobility was obtained by employing naphthalene bis-benzimidazole as an active layer on both dielectrics compared with perylene bis-benzimidazole semiconductor. The electrical behaviors of these semiconductors are discussed in relation to gate dielectric surface properties. (c) 2013 Elsevier B.V. All rights reserved.Öğe Effect of Anode Interfacial Modification by Self-Assembled Monolayers on the Organic Solar Cell Performance(Amer Chemical Soc, 2024) Mutlu, Adem; Arkan, M. Zeliha; Can, Mustafa; Tozlu, CemA series of self-assembled monolayer (SAM)-based benzoic acid derivatives such as 4-[5'-phenyl-2,2'-bitien-5-yl] benzoic acid (ZE-Ph), 4-[5'-(4-fluorophenyl)-2,2'-bitien-5-yl]benzoic acid (ZE-1F), and 4-[5'-(3,5-difluorophenyl)-2,2'-bitien-5-yl]benzoic acid (ZE-2F) were synthesized to use an interlayer between an ITO electrode and a MoO3 thin film layer in an organic solar cell (OSC) having poly-3 hexylthiophene (P3HT): [6,6]-phenyl C-61 butyric acid methyl ester (PC61BM) blend. The work function and surface wetting properties of the ITO were tuned by SAM molecules. The power conversion efficiency of fabricated OSC devices was improved compared to that of the control device from 1.93 to 2.20% and 2.22% with ZE-Ph and ZE-1F-modified ITO electrodes, respectively. The short-circuit current density (J(sc)) was increased from 6.16 to 7.10 mA/cm(2) and 6.94 mA/cm(2) with control, ZE-Ph, and ZE-1F-modified solar cells, respectively. The increase in short-circuit current density (J(sc)) shows that the hole-transporting properties between ITO and MoO3 were improved by the use of ZE-Ph and ZE-1F compared with that of the ITO/MoO3 electrode configuration. The open-circuit voltage (V-oc) of the SAM-modified ITO-based devices was also improved compared with the V-oc of unmodified ITO-based devices. These results show that using a monolayer as an interlayer in OSCs is an important strategy to improve the performance of OSCs. All the device parameters were characterized by Kelvin probe force microscopy, cyclic voltammetry, contact angle, and I-V measurements.Öğe Effect of TiO2 modification with amino-based self-assembled monolayer on inverted organic solar cell(Elsevier Science Bv, 2017) Tozlu, Cem; Mutlu, Adem; Can, Mustafa; Havare, Ali Kemal; Demic, Serafettin; Icli, SiddikThe effects of surface modification of titanium dioxide (TiO2) on the performance of inverted type organic solar cells (i-OSCs) was investigated in this study. A series of benzoic acid derivatized self-assembled monolayer (SAM) molecules of 4'-[(hexyloxy) phenyl] amino-3,5-biphenyl dicarboxylic acid (CT17) and 4'-[1-naphthyl (phenyl) amino] biphenyl-4-carboxylic acid (CT19) were utilized to modify the interface between TiO2 buffer layer and poly-3 hexylthiophene (P3HT):[ 6,6]-phenyl C-61 butyric acid methyl ester (PC61BM) active layer having the device structure of ITO/TiO2/SAM/P3HT:PC61BM/MoO3/Ag. The work function and surface wetting properties of TiO2 buffer layer served as electron transporting layer between ITO and PC61BM active layer were tuned by SAM method. The solar cell of the SAM modified devices exhibited better performance. The power conversion efficiency (PCE) of i-OSCs devices with bare TiO2 electrodes enhanced from 2.00% to 2.21% and 2.43% with CT17 and CT19 treated TiO2 electrodes, respectively. The open circuit voltage (V-oc) of the SAM treated TiO2 devices reached to 0.60 V and 0.61 V, respectively, while the V-oc of untreated TiO2 was 0.57 V. The water contact angle of i-OSCs with CT17 and CT19 SAMs was also higher than the value of the unmodified TiO2 electrode. These results show that inserting a monolayer at the interface between organic and inorganic layers is an useful alternative method to improve the performance of i-OSCs. (C) 2017 Elsevier B.V. All rights reserved.Öğe Electrical characterization of Ag/MoO3-x /p-Si Schottky diodes based on MoO3-x synthesized via sol-gel method: an investigation on frequency and voltage dependence(Springer, 2024) Mutlu, Adem; Tozlu, CemMoO3-x is a commonly used buffer layer in organic based optoelectronic devices to align energy level between active semiconductor and metal layer. The purpose of this study is to show the effects of the MoO3-x interlayer by comparing with a reference device without MoO3-x interlayer. To evaluate the effect of MoO3-x interlayer synthesized by sol-gel method, basic important parameters such as ideality factor (n), barrier height (& empty;(B)), interface states (N-ss) and series resistance (R-s) of Ag/MoO3-x/p-Si and Ag/p-Si Schottky diodes were calculated by electrical characterization methods. The current-voltage (I-V) measurements show that the ideality factor for the p-Si/Ag reference diode was decreased from 2.4 to 1.9 while rectification factor increasing 44.6 times using MoO3-x interlayer, and frequency-dependent measurements (C-V-f, G-V-f) were carried out to elucidate this deviation at room temperature for MoO3-x-based diode. From the XPS analysis, it was seen that Mo+6 and Mo+5 oxidation states were intense on the surface of the MoO3-x film, and the Mo+4 oxidation state increased as it went into the bulk. The changes in R-s and N-ss due to the energy levels formed by the Mo+6 and Mo+5 oxidation steps at the interface are depicted. In addition, the energy density distribution profile of N-ss was obtained using the I-V characteristics for various forward bias voltages range from 2.1 x 10(12) to 2.5 x 10(12) eV(-1) cm(-2). Based on the experimental results, the sol-gel synthesized MoO3-x thin film exhibits favorable rectification characteristics and holds promise for application as a Schottky diode.Öğe Fluorene-Carbazole Dendrimers: Synthesis, Thermal, Photophysical and Electroluminescent Device Properties(Wiley-V C H Verlag Gmbh, 2010) Usluer, Ozlem; Demic, Serafettin; Egbe, Daniel A. M.; Birckner, Eckhard; Tozlu, Cem; Pivrikas, Almantas; Ramil, Alberto Montaigne; Sariciftci, Niyazi SerdarNovel hole-transporting dendrimeric molecules containing dioctylfluorene, spirobi(fluorene) and spiro(cylododecane-fluorene) as the core unit and different numbers of carbazole and thiophene moieties as the peripheral groups are synthesized. All the dendrimers are characterized by H-1 NMR, C-13 NMR, FTIR, UV-vis, PL spectroscopy, and MALDI-TOF. They are thermally stable with high glass transition and decomposition temperatures and exhibit chemically reversible redox processes. They are used as the hole-transporting layer (HTL) material for multilayer organic light emitting diodes (OLEDs) with a low turn-on voltage of around 2.5 V and a bright green emission with a maximum luminance of around 25400 cd m(-2).Öğe Kuantum nokta yarıiletken türevlerinin sentezleri ve bunların güneş pillerinde uygulamaları(Ege Üniversitesi, 2012) Zafer, Ceylan; İçli, Sıddık; Özsoy, Cihan; Tozlu, CemKuantum nokta, yarı-iletken, ince film, günes hücresi.;Quantum dot, semiconductor, thin film, solar cell.;Son yıllarda günes hücresi uygulamaları için arastırılan malzemeler içerisinde ince film CuInS2 ve CuInSe2 bilesik yarıiletkenleri gelecek vaat eden önemli yarıiletkenler olarak göze çarpmaktadırlar. Periyodik tablonun birinci, üçüncü ve altıncı grup elementlerinden üçünün ya da daha fazlasının bir araya gelmesi ile olusan bu bilesik yarıiletkenler literatürde kalkoprit yarıiletkenler olarak bilinmektedir. Bu malzemelerin sogurma katsayıları ve bant boslugu günes spektrumu ile uyumludur. Bugüne kadar laboratuar sartlarında %17,7, ticari bir prototip modülde ise %10,2 verim elde edilmistir. Kuantum nokta malzemeler, eksiton yarıçapı parçacık boyutundan büyük olmasına karsın kuantum sınırlaması sebebiyle, bulk (yıgın) yarıiletkenlerden farklı davranmaktadır. Bant boslugu, fluoresans, absorpsiyon gibi optik özellikler malzemenin büyüklügüne göre degismektedir. Bu özellikler, ürünler sentezlenirken parçacık boyutunun ayarlanması ile kontrol edilebilmektedir. Kuantum nokta malzemelerle üretilmis günes pillerinden teorik olarak %66' ya varan bir dönüsüm verimi alınabilecegi hesaplanmıstır.Öğe Organik yarı iletken tabanlı fototransistör üretimi(Ege Üniversitesi, 2010) Tozlu, Cem; İçli, SıddıkBu projede, naftalen diimid yapısında bulunan imid pozisyonlarına simetrik benzimidazol fonksiyonel grubu baglanmıs naftalen bis-benzimidazol organik yarıiletken tabanlı alan etkili organik foto transistör (photoOFET) üretilmistir. Benzimidazol grubu naftalen diimid organik yarıiletkenin absorpsiyon bandını günes spektrumunun görünür bölgesine kaydırarak, foto duyarlı hale getirilmistir. Kullanılan aygıt geometrisinde saydam iletken cam kullanılması ile üretilen fototransistör yapısı iki yönlü ısıga karsı duyarlı hale getirilmistir. Üretilen alan etkili organik transistörün doyum bölgeindeki elektron mobilite degeri 6{604}10-3 cm2/V.s ve esik gerilim degeri 0,7 V olarak bulunmustur. Foton tarafından yaratılan yük çiftleri ısık siddetine baglı olarak akaç-kaynak akımını karanlık kosullara göre büyük ölçüde degistirmektedir. Ayrıca A.M 1,5 kosulları altında optiksel sinyalin elektriksel sinyale çevrimi naftalen bis-benzimidazol (NBBI) kullanılması ile üretilen photoOFET uygulanmasında incelenmistir. Foto-OFET yapısının ısıma altında foto-duyarlılıgı tükenim bölgesinde ve yıgınım bölgesinde sırasıyla 93,5 ve 1,82 dir. Foto-OFET'in tükenim ve yüksek yıgınım bölgesinde foto-tepki degerleri sırasıyla 14,3 mA/W and 32,7 mA/W olarak bulunmustur.;Foto-transistör, naftalen, fototepki, fotoduyarlılık.;Photo-transistor, naphthalene, photoresponsivity, photosensitivity.Öğe Performance improvement of organic solar cell via incorporation of donor type self-assembled interfacial monolayer(Elsevier Science Sa, 2019) Mutlu, Adem; Can, Mustafa; Tozlu, CemSurface engineering of solar cell subsrate plays an important role to achieve high performance organic solar cell (OSC). The surface modification of the electron selective electrodes on which active organic layers form is a main research issue to improve interface between the semiconductor and the electron selective electrode. Here an enhancement of performance of the inverted type organic solar cells (i-OSCs) was provided by the use of a facile method of titanium dioxide (TiO2) surface modification with triphenylamine based self-assembled monolayer (SAM) molecules. The surface potential as well the effective work function of SAMs treated TiO2 layer was better aligned to lowest unoccupied molecular orbital (LUMO) level of acceptor organic semiconductor for efficient electron charge extraction. As a result, the best maximum power conversion efficiency (PCE) of i-OSCs with and without SAMs modified TiO2 electrodes increased from 2.65% to 2.95%, respectively. The overall electrical parameters (short circuit current density, open circuit voltage and fill factor) of i-OSCs on the SAMS treated TiO2 electrode exhibited better results compared to unmodified TiO2 electrode. Series resistance (R-s) and shunt resistance (R-sh) of SAM treated devices was also evaluated to discuss an interface effects on the i-OSCs performance. These significant performance improvements reveal the potential application of SAMs for all solar cell technologies using TiO2 electrode.Öğe Photoresponsive n-channel organic field effect transistor based on naphthalene bis-benzimidazole with divinyltetramethyl disiloxane-bis (benzo-cyclobutene) gate insulator(Elsevier Science Sa, 2010) Tozlu, Cem; Erten-Ela, Sule; Icli, SiddikA novel photoresponsive organic field effect transistor (photOFET) based on naphthalene bis-benzimidazole (NBBI) by employing a transparent divinyltetramethyl disiloxane-bi (BCB) as dielectric is presented. The optical properties of naphthalene tetracarboxylic diimide (NTCDI) were changed by substitution of imidazole groups, in order to improve amplification of fabricated transistor by light in the visible region. The electrical characteristics of photOFET showed n-channel properties under illumination and dark. The NBBI based organic field effect transistor exhibited saturated electron mobility of 6 x 10(-3) cm(2)/V s with threshold voltage of 7.2 V. The photogenerated charge carriers strongly influence the drain-source current in comparison to dark condition. The photosensitivity and photoresponsivity of device are found to be 93.4 mA/W and 14.3 mA/W, respectively, at off-state of device under white light at AM 1.5 condition. (C) 2010 Elsevier B.V. All rights reserved.Öğe SAM-mediated interface engineering for enhanced Schottky diode characteristics(Springer, 2024) Mutlu, Adem; Can, Mustafa; Tozlu, CemMetal/insulator/semiconductor (MIS) contacts play a crucial role in semiconductor device technology, significantly impacting their reliability, stability, and performance. This study delves into the fabrication and characterization of Schottky diodes utilizing self-assembly monolayers (SAMs) on titanium dioxide (TiO2). The diodes were configured as Al/SAMs/TiO2/p-Si and their electrical characteristics were conducted through both current-voltage (I-V) and capacitance-voltage (C-V) measurements. The ideality factor (n) decreased from 3.3 for TiO2 to 1.95 for TiO2/CT17 and 1.85 for TiO2/CT19. Similarly, the reverse saturation current (I0) decreased from 9.2 x 10-9 A for TiO2 to 4.6 x 10-9 A for TiO2/CT17 and further to 1.1 x 10-9 A for TiO2/CT19. Barrier height (& empty;b) determined by various methods shows the highest values for TiO2/CT19, indicating decreased leakage current. Additionally, rectification ratios significantly improved for SAM-modified diodes, reaching values of 6 x 104 for TiO2/CT19. The integration of SAM molecules significantly reduces interface defects and enhances the electrical properties of Schottky diodes, as evidenced by the distinct capacitance behavior observed across varying frequencies. The capacitance trends in SAM-modified diodes, including the emergence of negative capacitance at high frequencies, highlight the impact of SAM functional groups on interface state dynamics. Furthermore, series resistance (Rs) values showed a decreasing trend with SAM modification, implying enhanced charge transport. This study highlights the potential of SAMs in optimizing Schottky diodes, contributing to the development of the next-generation nanoelectronic devices.Öğe Self-assembly monolayer impact on Schottky diode electrical properties(Elsevier, 2024) Mutlu, Adem; Can, Mustafa; Tozlu, CemThis study examines the electrical and charge transport properties of p-Si/TiO2/self-assembly monolayer (SAM)/ Al type Schottky diodes. The diodes were fabricated by applying the SAM molecule 4 '-[(3-methylphenyl)(phenyl) amino]biphenyl-4-carboxylic acid (CT21) onto titanium dioxide (TiO2) synthesized via the sol-gel method. The key parameters, including the ideality factor (n), series resistance (Rs), and barrier height (& empty;b), were used to assess the impact of CT21 on diode performance. Experimental results revealed that using CT21 at the TiO2/Al interface significantly enhances diode performance. The n decreased from 3.8 in the control diode to 1.9 with CT21. Rs was substantially reduced, and the & empty;b increased. The rectification ratio improved from 1x104 in the control diode to 1.1x105 in the CT21-modified diode. These enhancements, due to the CT21 molecule's ability to reduce interface states (Nss) and improve surface properties, underscore the potential of SAM coatings to open a new window in nanoelectronics with better performance and reliability.Öğe Synthesis of an amphiphilic ruthenium complex with swallow-tail bipyridyl ligand and its application in nc-DSC(Elsevier Science Sa, 2008) Sahin, Cigdem; Tozlu, Cem; Ocakoglu, Kasim; Zafer, Ceylan; Varlikli, Canan; Icli, SiddikAn amphiphilic swallow-tail bipyridyl ligand, 4,4'-bis(dihexylmethyl)-2,2'-bipyridine, and its heteroleptic ruthenium (II) complex were synthesized starting from dichloro-(p-cymene) ruthenium (II) dimer. The complex was characterized by UV/Vis and FTIR spectro-photometers, NMR spectroscopy and cyclic voltammetry. The performance of this complex as charge transfer photosensitizer in nc-TiO2 based dye sensitized solar cells was studied under standard AM 1.5 sunlight and by using an electrolyte consisting of 0.6 M N-methyl-N-butyl imidazolium iodide (BMII), 0.1 M LiI, 0.05 M I-2, 0.5 M 4-tert-butyl pyridine (TBP) in acetonitrile. The complex, CS9 in DMF, gave a photocurrent density of 12.62 mA/cm(2), 630 mV open circuit potential and 0.62 fill factor yielding 5.68% efficiency. (c) 2007 Elsevier B.V. All rights reserved.Öğe Synthesis, characterization, and DFT study of novel metallo phtalocyanines with four carboranyl clusters as photosensitisers for the photodynamic therapy of breast cancer cells(Elsevier Science Bv, 2019) Sener, Sevil; Bayrac, A. Tahir; Sener, B. Bilgenur; Tozlu, Cem; Acar, Nursel; Salih, Bekir; Yuksel, Mithat; Bekaroglu, OzerThe synthesis and characterization of novel Zn(II) and Co(II) phthalocyanines 4 and 5, respectively containing four o-carboranyl units (40 boron atoms, 32.5% boron by weight) at the peripheral positions are described. The phthalocyanines (Pcs) were synthesized by cyclotetramerization of the previously prepared precursor 4-(2-thiol-o-carboranyl)thiolato-phthalonitrile 3 with the presence of metal salt in boiling dry DMF under a dry nitrogen atmosphere. They were characterized by elemental analysis, UV-Vis, FT-IR, MALDI-TOF mass and H-1 NMR spectrometry. To elucidate the structural, spectroscopic and bonding properties of the obtained compounds, calculations with DFT/TD-DFT(Density Functional Theory/Time Dependent-Density Functional Theory) were performed. The cytotoxic effects of 4 and 5 on cancer cells and epithelial cells were determined. The targeted cytotoxicities of both compounds against cancer cells were analyzed with the cell viability test. Although, 4 caused less PDT (Photodynamic therapy) based decrease in cell viability of cancer cell line in comparison to 5, it showed comparatively high cytotoxicity against cancer cells but not epithelial cells. The IC50 (half maximal inhibitory concentration) values indicate that 4 with PDT shows 17.3 fold more cytotoxicity to breast cancer cells than epithelial cells. The selectivity in cytotoxicity of 4 makes it a good candidate for cancer treatment. Interestingly, 5 was found to be highly cytotoxic for both cancer and epithelial cell lines. Considerably, 5 might be used as a cancer drug when combined with targeting agents such as antibodies and aptamers.Öğe Yeni perilen ve naftalen türevi organik yarıiletkenlerin alan etkili organik transistör uygulamalarında karakteristik özelliklerinin analizi(Ege Üniversitesi, 2010) Tozlu, Cem; İçli, SıddıkBu tez çalısmasında farklı moleküler yapıdaki perilen ve naftalen organik yarıiletkenlerin aktif tabaka olarak kullanılan alan etkili transistör (OFET) yapısında farklı yüzey enerjilerine sahip polimer yalıtkan tabakalara baglı elektriksel parametreleri çıkartılmıstır. Yapılan çalısmalarda kullanılan organik yarıiletkenler; çekirdek yapılarına etil-hekzil ve benzimidazol fonksiyonel gruplarının baglı oldugu naftalen ve perilen molekül yapılarıdır. Arilen bisimimid yapıları olarak da isimlendirilen aynı fonksiyonel grupların baglı oldugu bu molekül yapıların kullanılması ile OFET uygulamalarında aralarındaki performans farklılıkları ve sebepleri ortaya çıkartılmıstır. Etil hekzil perilen diimid organik yarıiletkeninden 1,7{604}10-2 cm2V-1s-1, etil hekzil naftalen diimid organik yarıiletkeninden 9,0{604}10-3 cm2V-1s-1 maksimum elektron mobiliteleri elde edilmistir. Ayrıca absorpsiyon bandları görünür bölgeye dogru kaydırılmıs naftalen bisbenzimidazol organik yarıiletkenin AM 1,5 spektral dagılımına sahip ısıma altında foto- OFET uygulaması yapılarak, optiksel sinyalin elektriksel sinyale çevrimi incelenmistir. Foto-OFET yapısının ısıma altında foto-duyarlılıgı tükenim bölgesinde ve yıgınım bölgesinde sırasıyla 93,5 ve 1,82 dir. Foto-OFET'in tükenim ve yüksek yıgınım bölgesinde foto-tepki degerleri sırasıyla 14,3 mA/W and 32,7 mA/W olarak bulunmustur.;Field-effect transistor based on organic semiconductor, perylene, naphthalene, polymeric insulator.;Organik yarıiletken temelli alan etkili transistör, perilen, naftalen, polimer yalıtkan.Öğe Yeni perilen ve naftalen türevi organik yarıiletkenlerin alan etkili transistör uygulamalarında karakteristik özelliklerinin analizi(Ege Üniversitesi, 2010) Tozlu, Cem; İçli, Sıddık; Oktik, ŞenerBu tez çalışmasında farklı moleküler yapıdaki perilen ve naftalen organik yarıiletkenlerin aktif tabaka olarak kullanılan alan etkili organik transistör (OFET) yapısında farklı yüzey enerjilerine sahip polimer yalıtkan tabakalara bağlı elektriksel parametreleri çıkartılmıştır. Yapılan çalışmalarda kullanılan organik yarıiletkenler; çekirdek yapılarına etil-hekzil ve benzimidazol fonksiyonel gruplarının bağlı olduğu naftalen ve perilen moleküler yapılarıdır. Arilen bisimid yapıları olarak da isimlendirilen aynı fonksiyonel grupların bağlı olduğu bu molekül yapıların kullanılması ile OFET uygulamalarında aralarındaki performans farklılıkları ve sebepleri ortaya çıkartılmıştır. Etil hekzil perilen diimid organik yarıiletkeninden 1,72×10-2 cm2V-1s-1, etil hekzil naftalen diimid organik yarıiletkeninden 9,06×10-3 cm2V-1s-1 maksimum elektron mobiliteleri elde edilmiştir. Ayrıca absorpsiyon bandları görünür bölgeye doğru kaydırılmış naftalen bis-benzimidazol organik yarıiletkenin AM 1,5 spektral dağılımına sahip ışıma altında foto-OFET uygulaması yapılarak, optiksel sinyalin elektriksel sinyale çevrimi incelenmiştir. Foto-OFET yapısının ışıma altında foto-duyarlılığı tükenim bölgesinde ve yığınım bölgesinde sırasıyla 93,5 ve 1,82 dir. Foto-OFET’in tükenim ve yüksek yığınım bölgesinde foto-tepki değerleri sırasıyla 14,3 mA/W and 32,7 mA/W olarak bulunmuştur.
