Simply Complex: The Efficient Synthesis of an Intricate Molecular Acceptor for High-Performance Air-Processed and Air-Tested Fullerene-Free Organic Solar Cells
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- 作者：Seth M. McAfee ; Sergey V. Dayneko ; Pierre Josse ; Philippe Blanchard ; Clément Cabanetos ; Gregory C. Welch
- 刊名：Chemistry of Materials
- 出版年：2017
- 出版时间：February 14, 2017
- 年：2017
- 卷：29
- 期：3
- 页码：1309-1314
- 全文大小：425K
- ISSN：1520-5002
文摘
A perylene diimide (PDI) flanked diketopyrrolopyrrole (DPP) π-conjugated small molecule has been synthesized through an efficient and sustainable direct heteroarylation protocol. When paired with the donor polymer PTB7-Th, air-processed and tested bulk-heterojunction (BHJ) organic solar cells (OSCs) achieved a high power conversion efficiency (PCE) of 5.6%. The new acceptor showed favorable morphological changes upon solvent vapor annealing leading to a near 3-fold increase in PCE. This result is among the best reported utilizing DPP-based acceptors in air-processed and tested OSCs. All solar cells exhibited good air and light stability over a 35-day evaluation period.