含紫質之有機小分子合成與鑑定以及其應用於有機薄膜太陽能電池

Abstract

本研究的目標為致力於合成紫質小分子，並將其應用於有機太陽能電池中。本研究和成了兩個以紫質為中心的衍生物，PorTCAEH以及PorD3TCAO。兩個材料分別以單個噻吩和三噻吩作為電子架橋，末端修飾上alkyl cyanoacetate作為吸光的電子受體。兩者的UV吸收峰皆在400~800 nm之間。在與PC71BM混摻後，應用於無序混摻異質接面型太陽能電池之主動層上。PorTCAEH的短路電流為1.84 mA/cm2、開路電壓為0.72 V、填充因子33.6，元件光電轉換效率為(PCE) 0.44 %。PorD3TCAO的短路電流為4.66 mA/cm2、開路電壓為0.83 V、填充因子67.1，元件光電轉換效率為2.59 %。 本研究第二部分是將PorD3TCAO與PCBM混和後，應用在以可熱交聯苯乙烯基團樹枝狀碳六十聚合物 (PCBSD) 及高導電度之離子性富勒烯－碘化富勒吡咯烷 (FPI) 的混摻材料壓印成的奈米列陣中，製作成有序混摻異質接面型太陽能電池。其短路電流為1.78 mA/cm2、開路電壓為0.82 V、填充因子53.9，元件光電轉換效率為0.79 %。

The goal of this study is aimed to synthesis the porphyrin-based small molecules for the application in organic solar cells (OPV). In the first part of this study, two porphyrin-based materials, i.e., PorTCAEH and PorD3TCAO have been designed and synthesized. We used thiophene and terthiophene as electron-bridge. At the end of thiophene groups, we selected alkyl cyanoacetate group as electron-acceptor. The UV absorption bands of these two materials are both at the range from 400~800 nm. Both materials were used to fabricate the bulk heterojuction OPV devices using PC71BM as an acceptor. The PorTCAEH/ PC71BM (1 : 2, w/w) device exhibited the power conversion efficiency (PCE) of 0.44% (Voc = 0.72 V, Jsc = 1.84 mA/cm2, fill factor = 33.6). The PorD3TCAO/ PC71BM (1 : 2, w/w) based device exhibited the power conversion efficiency(PCE) of 2.59 % (Voc = 0.83 V, Jsc = 4.66 mA/cm2, fill factor = 67.1). In the second part of this study, we spin-coated PorD3TCAO/ PC71BM(1 : 2, w/w) on a nanorod array which is made from cross-linked fullerene derivatives, i.e., a mixture of [6,6]-phenyl-C61-butyric styryldendron ester (PCBSD) and ionic fullerene–fulleropyrroidinium iodide (FPI), to fabricate an ordered bulk heterojunction device. This device exhibited the power conversion efficiency of 0.79 % (Voc = 0.82 V, Jsc = 1.78 mA/cm2, fill factor = 53.9).