笏衍生物為主體之非富勒烯受體與界面層之合成及其於有機太陽能電池之應用

本論文中，合成了兩個新的非富勒烯受體材料：DTFIC與DTFIC-4F以及一個新的界面層材料：DTFNIC。受體材料部分以笏為主體，與噻吩熔合形成七環的多電子結構，並將兩側分別修飾缺電子基團2-(3-oxo-2,3-dihydroinden-1-ylidene)malononitrile (IC) 與2-(5,6-difluoro-3-oxo-2,3-dihydroinden-1-ylidene)malononitrile (DFIC)，材料吸收位於500-750 nm之間。氟化材料相較於氟化前吸收較為紅移、能階降低，將兩個受體材料分別與予體材料J71混摻，以反結構：ITO/ZnO/主動層/MoO3/Ag製成元件並經過後處理後，光電轉換效率分別可達到7.89%與8.62%。同時我們也就其氟化前後之光電性質、電化學性質、成膜的形態進行探討。第二部分探討了界面層材料，該材料是以笏為主體，接上噻吩與IC，側基上帶有三唑之離子化合物。將其用於反結構：ITO/Interlayer/ZnO/主動層/MoO3/Ag。可分別於PBDB-T：ITIC、J71：DTFIC-4F系統中提升光電轉換效率至7.57% 與8.92%。

關鍵字

太陽能電池；受體材料；界面層材料

並列摘要

In this study, two fluorene-based non-fullerene acceptors, DTFIC and DTFIC-4F and a new interlayer material, DTFNIC were synthesizd. Both DTFIC and DTFIC-4F contain a fluorene and two thiophene fused heptacyclic ring as electron-rich central core and 2-(3-oxo-2,3-dihydroinden-1-ylidene)malononitrile (IC) and 2-(5,6-difluoro-3-oxo-2,3-dihydroinden-1-ylidene)malononitrile as electron-deficient unit on both ends respectively. Both compounds exhibit strong absorption in the range from 500 to 700 nm. Compare to DTFIC, DTFIC-4F demonstrates red-shifted absorption and downshifted energy level alighment. The bulk heterojunction solar cells based on J71:DTFIC and J71:DTFIC-4F were fabricated with the structure of ITO/ZnO/active layer/MoO3/Ag. Their best power conversion efficiencies exhibit as 7.89% and 8.62% respectively. The effects of fluorine substituent on the photovoltaic property, electro-optical property and film morphology were investigated. In the second part of this study, an interlayer material, DTFNIC was synthesized. DTFNIC contains two thiophene-flanked fluorene core with alkyl triazolium side-chain and end-capped with two IC units. When the interlayer was applied between ITO and ZnO layers, the bulk heterojunction solar cells, ITO/interlayer/ZnO/active layer/MoO3/Ag, show the enhanced PCEs of 7.57% and 8.92% for both PBDB-T:ITIC and J71:DTFIC-4F systems.