Akademik Veri Yönetim Sistemi
Tezin Türü: Yüksek Lisans
Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Fen Bilimleri Enstitüsü, Türkiye
Tezin Onay Tarihi: 2013
Tezin Dili: İngilizce
Öğrenci: Şevki Can Cevher
Eş Danışman: Levent Kamil Toppare
Danışman: Ali Çırpan
Özet:Fused bithiophene containing conjugated polymers are recently used in different applications; for example organic light emitting diodes, solar cells, electrochromic devices and organic field effect transistors. Fused bithiophene derivatives increase the planarity, charge mobility and decrease band gap when incorporated into the polymer backbone. Connecting atom between the bithiopheneunit can be phosphorous, silicon, nitrogen and sulphur. In this thesis, dihienothiophene was coupled with benzotriazole via Stille Coupling and synthesized polymers were used in optoelectronic applications. Molecular weight and thermal behavior were investigated with GPC, TGA and DSC analysis. Oxidation and reduction behaviors of the polymers were studied with cyclic voltammetry. The absorption properties of the conjugated polymers in solution and film were investigated. After optimizing thickness and morphologies of polymer:PCBM, device production and current/voltage property measurements were conducted in a nitrogen-filled glovebox system (moisture <0.1 ppm; oxygen <0.1 ppm). The analysis of the photovoltaic devices (ITO/PEDOT:PSS/polymer:PCBM/Metal) was performed by means of the energy conversion efficiency measured under standard AM1.5 G illumination (100mW.cm-2).