Efficient Semitransparent Organic Solar Cells with Tunable Color enabled by an Ultralow‐Bandgap Nonfullerene Acceptor

• DOI: 10.1002/adma.201703080
• Publication Date: 2017-10-04T16:44:51Z
• Authors: Yong Cui; Chenyi Yang; Huifeng Yao; Jie Zhu; Yuming Wang; Guoxiao Jia; Feng Gao; Jianhui Hou
• Keywords: Acceptor; Opacity

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", designed and synthesized, whose absorption spectrum mainly located near-infrared region. When IEICO-4Cl blended with different polymer donors (J52, PBDB-T, PTB7-Th), colors blend films can be tuned from purple to blue cyan, respectively. Traditional a nontransparent Al electrode fabricated by J52:IEICO-4Cl, PBDB-T:IEICO-4Cl, PTB7-Th:IEICO-4Cl yield power conversion efficiencies (PCE) 9.65 ± 0.33%, 9.43 0.13%, 10.0 0.2%, By using 15 nm Au as electrode, based on these three blends also PCEs 6.37%, 6.24%, 6.97% high average visible transmittance (AVT) 35.1%, 35.7%, 33.5%, Furthermore, via changing thickness OSCs, relationship between efficiency studied detail, impressive PCE 8.38% AVT 25.7% obtained, which outstanding value