State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu, 610054, P. R. China.
MOE Key Laboratory of Macromolecular Synthesis and Functionalization, State Key Laboratory of Silicon Materials, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.
Adv Mater. 2017 May;29(19). doi: 10.1002/adma.201606729. Epub 2017 Mar 15.
An organic solar cell (OSCs) containing double bulk heterojunction (BHJ) layers, namely, double-BHJ OSCs is constructed via stamp transferring of low bandgap BHJ atop of mediate bandgap active layers. Such devices allow a large gain in photocurrent to be obtained due to enhanced photoharvest, without suffering much from the fill factor drop usually seen in thick-layer-based devices. Overall, double-BHJ OSC with optimal ≈50 nm near-infrared PDPP3T:PC BM layer atop of ≈200 nm PTB7-Th:PC BM BHJ results in high power conversion efficiencies over 12%.
一种含有双体异质结（BHJ）层的有机太阳能电池（OSC），即双-BHJ OSC，是通过将低带隙 BHJ 层压印转移到中带隙活性层上来构建的。由于增强了光捕获，这种器件可以获得很大的光电流增益，而不会像通常在基于厚层的器件中那样大幅降低填充因子。总体而言，在 ≈200nm 的 PTB7-Th：PC71BM BHJ 之上具有优化的 ≈50nm 近红外 PDPP3T：PC71BM 的双-BHJ OSC 可实现超过 12%的高功率转换效率。
