Influence of Solid-State Packing of Dipolar Merocyanine Dyes on Transistor and Solar Cell Performances

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• 作者：Alhama Arjona-Esteban ; Julian Krumrain ; Andreas Liess ; Matthias Stolte ; Lizhen Huang ; David Schmidt ; Vladimir Stepanenko ; Marcel Gs盲nger ; Dirk Hertel ; Klaus Meerholz ; Frank W眉rthner
• 刊名：Journal of the American Chemical Society
• 出版年：2015
• 出版时间：October 28, 2015
• 年：2015
• 卷：137
• 期：42
• 页码：13524-13534
• 全文大小：597K
• ISSN：1520-5126

文摘

A series of nine dipolar merocyanine dyes has been studied as organic semiconductors in transistors and solar cells. These dyes exhibited single-crystal packing motifs with different dimensional ordering, which can be correlated to the performance of the studied devices. Hereby, the long-range ordering of the dyes in staircase-like slipped stacks with J-type excitonic coupling favors charge transport and improves solar cell performance. The different morphologies of transistor thin films and solar cell active layers were investigated by UV鈥搗is, AFM, and XRD experiments. Selenium-containing donor鈥揳cceptor (D鈥揂) dimethine dye 4 showed the highest hole mobility of 0.08 cm² V^鈥? s^鈥?. BHJ solar cells based on dye 4 were optimized by taking advantage of the high crystallinity of the donor material and afforded a PCE of up to 6.2%.