Semitransparent organic solar cells with light utilization efficiency of 4% using fused-cyclopentadithiophene based near-infrared polymer donor
- Authors
- Yoon, Jung Won; Bae, Hyemin; Yang, Jonghee; Ha, Jong-Woon; Lee, Changjin; Lee, Jaewon; Yoon, Sung Cheol; Choi, Hyosung; Ko, Seo-Jin
- Issue Date
- Jan-2023
- Publisher
- Elsevier B.V.
- Keywords
- Average visible transmission; Light utilization efficiency; NIR-absorbing polymer donor; Semi-transparent organic solar cell
- Citation
- Chemical Engineering Journal, v.452, pp.1 - 9
- Indexed
- SCIE
SCOPUS
- Journal Title
- Chemical Engineering Journal
- Volume
- 452
- Start Page
- 1
- End Page
- 9
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/172774
- DOI
- 10.1016/j.cej.2022.139423
- ISSN
- 1385-8947
- Abstract
- Semi-transparent organic solar cells (ST-OSCs) have attracted significant attention for various applications such as building-integrated photovoltaics and smart window technologies. Although various low-band gap non-fullerene acceptors have been developed, near-infrared (NIR) absorbing polymeric donors have been rarely reported for highly efficient ST-OSCs. In this study, we synthesize cyclopentadithiophene (CPDT) core-based NIR-absorbing polymer donors, PL1 and PL2. These polymer donors show strong NIR absorption capabilities with high transmittance in visible wavelength region and deep-lying HOMO levels for cascade energy level alignment with low-bandgap non-fullerene acceptors. The opaque device with PL2 and PCBM exhibits higher power conversion efficiency of 11.62% than that of the device with PL1 (PCE: 7.54%) due to lower charge-carrier recombination loss and balanced charge-carrier mobilities. Most significantly, incorporation of PL2 into ST-OSCs results in a PCE of 9.91 %, average visible transmittance of 40.4 % and light utilization efficiency (LUE) of 4.00 %. This work achieves the one of the highest LUE in ST-OSCs based on new NIR-absorbing polymer donors.
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