Rubrene-based interfacial engineering toward enhanced performance in inverted polymer solar cells
Rubrene-based interfacial engineering toward enhanced performance in inverted polymer solar cells
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DOI：
10.1016/j.orgel.2017.07.042
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发表时间：
2017-11
影响因子：
3.2
通讯作者：
Zhongqiang Wang;T. Sano;Taojun Zhuang;Xiaofeng Wang;Hisahiro Sasabe;J. Kido
中科院分区：
文献类型：
--
作者：
Zhongqiang Wang;T. Sano;Taojun Zhuang;Xiaofeng Wang;Hisahiro Sasabe;J. Kido
红荧烯是一种具有稳定稠环分子结构的有机半导体材料，被用作倒置型有机太阳能电池的双界面层。当在MoO 3基空穴收集层和由聚{4，8-双[（2-乙基己基）氧基]苯并[1，2-B：4，5-b ']二噻吩-2，6-二基-交替-3-氟-2-[（2-乙基己基）羰基]噻吩并[3，4-B]噻吩-4，6-二基}（PTB 7）和[6，6]-苯基C71-丁酸甲酯（PC 71 BM）组成的体异质结（BHJ）光活性层之间引入3 nm厚的红荧烯薄层时，功率转换效率提高超过12%（从7.2%到8.1%）。结果表明，红荧烯薄层的插入抑制了激子的猝灭，改善了激子的解离，提高了载流子的收集效率，减弱了电荷的复合，从而提高了器件的性能。
Rubrene, an organic semiconductor having stable fused-ring molecular structure was used as a double interfacial layer in inverted organic solar cells. When a thin, 3 nm-thick layer of rubrene was introduced between a MoO3-based hole-collecting layer and a bulk-heterojunction (BHJ) photo-active layer consisting of poly{4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b']dithiophene-2,6-diyl-alt-3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophene-4,6-diyl} (PTB7) and [6,6]-phenyl C71-butyric acid methyl ester (PC71BM), the power conversion efficiency was improved over 12% (from 7.2% to 8.1%). It was demonstrated that the insertion of thin rubrene layer showed suppressed exciton quenching and improved exciton dissociation, resulting in more efficient charge carrier collection and weaker charge recombination, thus improving the device performance.