Department of Materials Science and Engineering, College of Engineering, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing, 100871, China.
Department of Physics, Chinese University of Hong Kong, New Territories, Hong Kong, China.
Adv Mater. 2017 Aug;29(31). doi: 10.1002/adma.201701308. Epub 2017 Jun 13.
A fused hexacyclic electron acceptor, IHIC, based on strong electron-donating group dithienocyclopentathieno[3,2-b]thiophene flanked by strong electron-withdrawing group 1,1-dicyanomethylene-3-indanone, is designed, synthesized, and applied in semitransparent organic solar cells (ST-OSCs). IHIC exhibits strong near-infrared absorption with extinction coefficients of up to 1.6 × 10 m cm , a narrow optical bandgap of 1.38 eV, and a high electron mobility of 2.4 × 10 cm V s . The ST-OSCs based on blends of a narrow-bandgap polymer donor PTB7-Th and narrow-bandgap IHIC acceptor exhibit a champion power conversion efficiency of 9.77% with an average visible transmittance of 36% and excellent device stability; this efficiency is much higher than any single-junction and tandem ST-OSCs reported in the literature.
一种融合的六元环电子受体 IHIC，基于强给电子基团二噻吩并[3,2-b]噻吩，并由强吸电子基团 1,1-二氰基亚甲基-3-茚酮环绕，被设计、合成并应用于半透明有机太阳能电池（ST-OSCs）。IHIC 表现出强烈的近红外吸收，消光系数高达 1.6×10 m cm ，窄光学带隙为 1.38 eV，电子迁移率高达 2.4×10 cm V s 。基于窄带隙聚合物给体 PTB7-Th 和窄带隙 IHIC 受体的混合体的 ST-OSCs 表现出 9.77%的冠军功率转换效率，平均可见光透过率为 36%，且具有出色的器件稳定性；该效率远高于文献中报道的任何单结和串联 ST-OSCs。
