低能帶可溶式小分子予體於 異質結構的太陽能電池

Low-Band-Gap small molecule donor for Bulk Heterojunction solar cells

樂晏廷(Yen-Ting Yueh)

指導教授 ： 吳孟奇

國立清華大學/電機資訊學院/電子工程研究所/碩士(2013年)

摘要

在這篇論文中將會探討，我們合成出兩支小分子材料(BABDT6T,RHBDT6T)具有對稱性、共平面性及共軛性，形成A-D-A的構造，中間的核心是TBDT，兩旁分別接上不同的接受體BA 及RH，分析兩隻材料發現BABDT6T相較於RHBDT6T有紅移的現象，使用溶液製成的方式做成元件，做用在塊狀異質結構的太陽能電池上，利用主動層厚度，熱退火，添加劑等方式優化效率，最後得出BABDT6T最高效率為3.20%，最好條件是主動層厚度180nm、熱退火75度10分鐘、加入0.75% v/v DIO、與PC70BM比例為1:0.5。

關鍵字

太陽能電池

並列摘要

In this study we have strategically designed and convergently synthesized two novel, symmetrical, and linear A–D–A-type π-conjugated donor molecules (BABDT6T, RHBDT6T), each containing a planar electron-rich 2-octylthiene-2-yl–substituted benzodithiophene (TBDT) unit as the core, each containing TBDT as the central electron donor unit flanked by three octylthiophene units and end capped with RH or barbutaric acid (BA) acceptors. The nature of the acceptor end groups affects the intermolecular interactions of RHBDT6T and BABDT6T and, thereby, their bulk properties, including their optical, electrochemical, and photovoltaic properties. Among our tested systems, the best BHJ solar cell device incorporating a blend of BATBDT and PC70BM at a ratio of 1:0.5 delivered the highest PCE (3.20%) after addition of 0.75% of 1,8-diiodooctane.

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