Ditiyenotiyofen ve benzotriazol içeren konjüge polimerlerin sentezi, karakterizasyonu ve fotovoltayik uygulamaları.


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).