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

Cui, YongChinese Academic Science, Peoples R China; University of Chinese Academic Science, Peoples R China (author)

Funding Agencies|National Natural Science Foundation of China [91633301, 51673201, 91333204, 21325419]; Chinese Academy of Sciences [XDB12030200]
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 non-fullerene 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.

Yang, ChenyiChinese Academic Science, Peoples R China; University of Science and Technology Beijing, Peoples R China (author)
Yao, HuifengChinese Academic Science, Peoples R China (author)
Zhu, JieChinese Academic Science, Peoples R China; Ocean University of China, Peoples R China (author)
Wang, YumingLinköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten(Swepub:liu)yumwa29 (author)
Jia, GuoxiaoChinese Academic Science, Peoples R China; University of Science and Technology Beijing, Peoples R China (author)
Gao, FengLinköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten(Swepub:liu)fenga88 (author)
Hou, JianhuiChinese Academic Science, Peoples R China; University of Chinese Academic Science, Peoples R China (author)
Chinese Academic Science, Peoples R China; University of Chinese Academic Science, Peoples R ChinaChinese Academic Science, Peoples R China; University of Science and Technology Beijing, Peoples R China (creator_code:org_t)

By the author/editor: Cui, Yong; Yang, Chenyi; Yao, Huifeng; Zhu, Jie; Wang, Yuming; Jia, Guoxiao; show more...; Gao, Feng; Hou, Jianhui; show less...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Chemical Science ...; and Polymer Chemistr ...

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