We report for the first time the use of a carbonyl-bridged triarylamine core with diketopyrrolopyrrole terminal units to generate a three-dimensional, non-planar non-fullerene electron acceptor with favourable properties for use in organic photovoltaic devices. The carbonyl-bridged triarylamine-functionalized, small molecule non-fullerene electron acceptor, 2,6,10-tris(5-(2,5-bis(2-ethylhexyl)-3,6-dioxo-4-(thiophen-2-yl)-2,3,5,6-tetrahydropyrrolo[3,4-c]pyrrol-1-yl)thiophen-2-yl)-4H-benzo[9,1]quinolizino[3,4,5,6,7-defg]acridine-4,8,12-trione (coded as R1), was synthesized via the industrially viable, Suzuki cross-coupling reaction using commercially and cheaply available substrates. Using PTB7 as a donor, a power conversion efficiency of 9.33% was achieved in simple, solution-processable bulk-heterojunction devices, a result that is amongst the best in the literature for three-dimensional non-fullerene acceptors.

中文翻译：

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羰基桥联的三芳基胺和二酮吡咯并吡咯官能团的首次连接以生成三维非富勒烯电子受体

我们首次报道了羰基桥联的三芳基胺核与二酮吡咯并吡咯末端单元的使用，以产生具有良好性能的三维，非平面非富勒烯电子受体，用于有机光伏器件。羰基桥联的三芳基胺官能化的小分子非富勒烯电子受体2,6,10-tris（5-（2,5-双（2-乙基己基）-3,6-二氧代-4-（噻吩-2） -yl）-2,3,5,6-四氢吡咯并[3,4- c ]吡咯-1-基）噻吩-2-基）-4 H-苯并[9,1] quinolizino [3,4,5， 6,7- DEFG ]吖啶-4,8,12-三酮（编码为R1），合成通过工业上可行的铃木交叉偶联反应，使用市售和廉价的底物。使用PTB7作为供体，在简单的可溶液处理的本体异质结器件中实现了9.33％的功率转换效率，这一结果在三维非富勒烯受体中是最好的。