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High‐Performance Colorful Semitransparent Polymer Solar Cells with Ultrathin Hybrid‐Metal Electrodes and Fine‐Tuned Dielectric Mirrors
Author(s) -
Xu Guiying,
Shen Liang,
Cui Chaohua,
Wen Shanpeng,
Xue Rongming,
Chen Weijie,
Chen Haiyang,
Zhang Jingwen,
Li Hongkun,
Li Yaowen,
Li Yongfang
Publication year - 2017
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201605908
Subject(s) - materials science , optoelectronics , transmittance , electrode , energy conversion efficiency , opacity , dielectric , layer (electronics) , active layer , substrate (aquarium) , reflection (computer programming) , optics , nanotechnology , thin film transistor , chemistry , physics , oceanography , geology , computer science , programming language
Polymer solar cells (PSCs) possess the unique features of semitransparency and coloration, which make them potential candidates for applications in aesthetic windows. Here, the authors fabricate inverted semitransparent PSCs with high‐quality hybrid Au/Ag transparent top electrodes and fine‐tuned dielectric mirrors (DMs). It is demonstrated that the device color can be tailored and the light harvesting in the PSCs can be enhanced by matching the bandgap of the polymer donors in the active layer with the specifically designed maximum‐reflection‐center‐wavelengths of the DMs. A detailed chromaticity analysis of the semitransparent PSCs from both bottom and top (mirror) views is also carried out. Furthermore, the inverted semitransparent PSCs based on PTB7‐Th:PC 71 BM with six pairs of DMs demonstrate a maximum power conversion efficiency (PCE) of 7.0% with an average visible transmittance (AVT) of 12.2%. This efficiency is one of the highest reported for semitransparent PSCs, corresponding to 81.4% of the PCE from opaque counterpart devices. The device design and processing method are also successfully adapted to a flexible substrate, resulting in a device with a competitive PCE of 6.4% with an AVT of 11.5%. To the best of our knowledge, this PCE value is the highest value reported for a flexible semitransparent PSC.