High-Performance Ternary Nonfullerene Polymer Solar Cells with Both Improved Photon Harvesting and Device Stability
High-Performance Ternary Nonfullerene Polymer Solar Cells with Both Improved Photon Harvesting and Device Stability
复制标题
具有改进的光子捕获和器件稳定性的高性能三元非富勒烯聚合物太阳能电池
DOI：
10.1021/acsami.8b06822
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发表时间：
2018
影响因子：
9.5
通讯作者：
Cao Yong
中科院分区：
文献类型：
--
作者：
Xiao Manjun;Zhang Kai;Dong Sheng;Yin Qingwu;Liu Zixian;Liu Liqian;Huang Fei;Cao Yong
聚合物太阳能电池（PSC）的效率和稳定性是实际应用的两个最重要的决定性因素。在这里，通过引入两种相容性良好的聚合物供体，制备了高效稳定的三元PSC（聚[4，8-双（5-（2-乙基己基）噻吩-2-基）苯并[1，2-B]; 4，5-b 0]二噻吩-2，6-二基-alt-（4-（2-乙基己基）-3-氟噻吩并[3，4-B]噻吩-）-2-羧酸酯-2-6-二基]和聚[[9-（1-辛基壬基）-9H-咔唑-2，7-二基]-2，5-噻吩二基-2，1，3-苯并噻二唑-4，7-二基-2，5-噻吩二基]）（3，9-双（2-亚甲基-（3-（1，1-二氰基亚甲基）-茚满酮）-5，5，1,1，1,1-四（4-己基苯基）-二噻吩并[2，3-d：2′，3 ′-d′]-s-引达省并[1，2-B：5，6-B′]二噻吩））。结果发现，Fo rster共振能量转移作为一个有效的途径，以进一步加强在这个三元系统中的光子捕获，这导致在一个显着的改善电流密度（JSC），而不牺牲强吸收的二元共混物在近红外区域。同时，由于三元薄膜中的互锁形态，倒置和传统的三元聚苯乙烯在空气条件下比相关的二元聚苯乙烯表现出更好的稳定性。优化后的三元PSC表现出出色的功率转换效率（PCE）的9.53%，由于在JSC和填充因子的同步改善。此外，这种三元策略可以通过使用超窄带隙非富勒烯受体IEICO-4F得到进一步证实，三元PSC的冠军PCE达到12.15%。
Efficiency and stability of polymer solar cells (PSCs) are the two most significant decisive factors for the purpose of actual applications. Here, highly efficient and stable ternary PSCs were fabricated by incorporating two well-compatible polymer donors (poly[4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b;4,5-b0]dithiophene-2,6-diyl-alt-(4-(2-ethylhexyl)-3-fluorothieno[3,4-b]thiophene-)-2-carboxylate-2-6-diyl] and poly[[9-(1-octylnonyl)-9H-carbazole-2,7-diyl]-2,5-thiophenediyl-2,1,3-benzothiadiazole-4,7-diyl-2,5-thiophenediyl]) with one narrow band gap nonfullerene acceptor (3,9-bis(2-methylene-(3-(1,1-dicyanomethylene)-indanone)-5,5,11,11-tetrakis(4-hexylphenyl)-dithieno[2,3-d:2′,3′-d′]-s-indaceno[1,2-b:5,6-b′]dithiophene)). It is found that Förster resonance energy transfer acts as an efficient pathway to further strengthen photon harvesting in this ternary system, which results in a significant improvement in current density (JSC) without sacrificing the strong absorption of binary blends in the near-infrared region. Meanwhile, both of the inverted and conventional ternary PSCs exhibit better stability compared with the related binary PSCs in air condition because of the interlocked morphology in ternary films. The optimized ternary PSCs exhibit an outstanding power conversion efficiency (PCE) of 9.53% resulting from the synchronous improvements inJSCand fill factor. Moreover, this ternary strategy can be further confirmed by the use of an ultranarrow-band gap nonfullerene acceptor IEICO-4F, and the champion PCE of ternary PSCs reaches to 12.15%.