高溶解性チオフェンオリゴマーの塗布製膜性と有機薄膜太陽電池特性

摘要

12量体のチオフェンオリゴマーと　PCBMからなる　バルクヘテロ型有機薄膜太陽電池にて、発電作用を確認した。%We synthesized thiophene octamer and dodecamer substituted with an aryl group at the position 3 of the thiophene rings, and report that those were highly soluble in chloroform enough to make an organic film by spin coating[1], although non-substituted thiophene oligomers(e.g.:a-sexithiophene) were hardly soluble in organic solvents. Although some steric hindrance exists around the position 3 of the thiophene rings, X-ray crystallographic analysis showed that the oligomers had a stereoregularity, and a carrier mobility of the dodecamer as an FET devices was 0.12cm~2/Vs[1]. In this report, we fabricated bulk heterojunction solar cells using the oligomers, and found that the dodecamer only forms a uniform film and shows photovoltaic property.