Effect of layer thickness on the electrical parameters and conduction mechanisms of conjugated polymer-based heterojunction diode

Basit Öğe Kaydı
dc.contributor.authorYıldız, Dilber Esra
dc.contributor.authorApaydın, Doğukan Hazar
dc.contributor.authorToppare, Levent Kamil
dc.contributor.authorÇırpan, Ali
dc.date.accessioned2019-05-10T09:38:55Z
dc.date.available2019-05-10T09:38:55Z
dc.date.issued2017
dc.departmentHitit Üniversitesi, Fen Edebiyat Fakültesi, Fizik Bölümü
dc.description.abstractIn this study, thickness-dependent current density–voltage (J–V) characteristics obtained for poly{(9,9-dioctylfluorene)?2,7-diyl-(4,7-bis(thien-2-yl) 2-dodecyl-benzo[1,2,3] triazole)} (PFTBT) conjugated copolymer based heterojunction diode fabricated on ITO were investigated in terms of electrical characteristics. In order to analyze J–V plots with ITO/PEDOT:PSS/PFTBT:PC61BM/LiF/Al configuration, the thickness-dependent J–V measurements were applied in the thickness range between 90 and 200 nm. The effect of PFTBT:PC61BM layer thickness on the forward J–V characteristics were investigated by evaluating electrical parameters such as zero bias barrier height (?Bo), ideality factor (n), shunt resistance (Rsh), series resistance (Rs), the interface states density (Nss), and space-charge limited mobility. The results show that at PFTBT:PC61BM layer thickness of 90 and 200 nm, ideality factor for ITO/PEDOT:PSS/PFTBT:PC61BM/LiF/Al heterojunction diodes ranged from 2.726 to 3.121 and the thermionic emission over the heterojunction diodes is crucial at low current densities and the intrinsic thermally generated charge carriers controlled the forward current this region of the heterojunction diode. At relatively higher voltage, the current mechanism of ITO/PFTBT:PC61BM/PEDOT:PSS/LiF/Al heterojunction diodes were found to obey a space charge limited (SCLC) conduction mechanism. The values of Nss and Rs in heterojunction diodes increase with increasing PFTBT:PC61BM layer thickness and effect the main electrical parameters of diodes. In addition, the leakage current of heterojunction diodes are taken and interpreted via Poole-Frenkel emission and Schottky emission. The leakage current was controlled in ITO/PEDOT:PSS/PFTBT:PC61BM/LiF/Al heterojunction diodes by Poole-Frenkel emission above 140 nm and by Schottky emission under 140 nm. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44817. © 2017 Wiley Periodicals, Inc.
dc.identifier.citationYıldız, D. E., Apaydın, D. H., Toppare, L., & Cirpan, A. (2017). Effect of layer thickness on the electrical parameters and conduction mechanisms of conjugated polymer?based heterojunction diode. Journal of Applied Polymer Science, 134(19).
dc.identifier.doi10.1002/app.44817
dc.identifier.issn0021-8995
dc.identifier.issue19en_US
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.1002/app.44817
dc.identifier.urihttps://hdl.handle.net/11491/547
dc.identifier.volume134en_US
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherJohn Wiley and Sons Inc.
dc.relation.ispartofJournal of Applied Polymer Science
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectConduction Mechanismsen_US
dc.subjectPFTBTen_US
dc.subjectPoole-Frenkelen_US
dc.titleEffect of layer thickness on the electrical parameters and conduction mechanisms of conjugated polymer-based heterojunction diode
dc.typeArticle

Dosyalar

Koleksiyon

Scopus İndeksli Yayınlar Koleksiyonu
Makale Koleksiyonu
WoS İndeksli Yayınlar Koleksiyonu