材料科学
三元运算
有机太阳能电池
异质结
聚合物太阳能电池
能量转换效率
光电子学
接受者
带隙
吸收(声学)
聚合物
化学工程
复合材料
工程类
凝聚态物理
物理
程序设计语言
计算机科学
作者
Tingting Yan,Wei Song,Jiaming Huang,Ruixiang Peng,Like Huang,Ziyi Ge
标识
DOI:10.1002/adma.201902210
摘要
Abstract Ternary heterojunction strategies appear to be an efficient approach to improve the efficiency of organic solar cells (OSCs) through harvesting more sunlight. Ternary OSCs are fabricated by employing wide bandgap polymer donor (PM6), narrow bandgap nonfullerene acceptor (Y6), and PC 71 BM as the third component to tune the light absorption and morphologies of the blend films. A record power conversion efficiency (PCE) of 16.67% (certified as 16.0%) on rigid substrate is achieved in an optimized PM6:Y6:PC 71 BM blend ratio of 1:1:0.2. The introduction of PC 71 BM endows the blend with enhanced absorption in the range of 300–500 nm and optimises interpenetrating morphologies to promote photogenerated charge dissociation and extraction. More importantly, a PCE of 14.06% for flexible ITO‐free ternary OSCs is obtained based on this ternary heterojunction system, which is the highest PCE reported for flexible state‐of‐the‐art OSCs. A very promising ternary heterojunction strategy to develop highly efficient rigid and flexible OSCs is presented.
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