Premium
Efficient Semitransparent Organic Solar Cells with Tunable Color enabled by an Ultralow‐Bandgap Nonfullerene Acceptor
Author(s) -
Cui Yong,
Yang Chenyi,
Yao Huifeng,
Zhu Jie,
Wang Yuming,
Jia Guoxiao,
Gao Feng,
Hou Jianhui
Publication year - 2017
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201703080
Subject(s) - organic solar cell , materials science , transmittance , band gap , optoelectronics , energy conversion efficiency , acceptor , absorption (acoustics) , electrode , opacity , pedot:pss , optics , polymer , nanotechnology , layer (electronics) , composite material , chemistry , physics , condensed matter physics
Semitransparent organic solar cells (OSCs) show attractive potential in power‐generating windows. However, the development of semitransparent OSCs is lagging behind opaque OSCs. Here, an ultralow‐bandgap nonfullerene acceptor, “IEICO‐4Cl”, is designed and synthesized, whose absorption spectrum is mainly located in the near‐infrared region. When IEICO‐4Cl is blended with different polymer donors (J52, PBDB‐T, and PTB7‐Th), the colors of the blend films can be tuned from purple to blue to cyan, respectively. Traditional OSCs with a nontransparent Al electrode fabricated by J52:IEICO‐4Cl, PBDB‐T:IEICO‐4Cl, and PTB7‐Th:IEICO‐4Cl yield power conversion efficiencies (PCE) of 9.65 ± 0.33%, 9.43 ± 0.13%, and 10.0 ± 0.2%, respectively. By using 15 nm Au as the electrode, semitransparent OSCs based on these three blends also show PCEs of 6.37%, 6.24%, and 6.97% with high average visible transmittance (AVT) of 35.1%, 35.7%, and 33.5%, respectively. Furthermore, via changing the thickness of Au in the OSCs, the relationship between the transmittance and efficiency is studied in detail, and an impressive PCE of 8.38% with an AVT of 25.7% is obtained, which is an outstanding value in the semitransparent OSCs.