An optimal molecule-matching co-sensitization system for the improvement of photovoltaic performances of DSSCs

• DOI: 10.1039/d2cp02796h
• Publication Date: 2022-09-14T13:48:45Z
• Authors: Yongliang Liu; Shengbo Zhu; Wei Li; Yilin Su; Hongwei Zhou; Ran Chen; Weixing Chen; Wenzhi Zhang; Xiaoling Niu; Xinbing Chen; Zhongwei An
• Keywords: Biphenyl

Three biphenyl co-sensitizers (4OBA, 8OBA and 12OBA) with different terminal oxyalkyl chains were synthesized co-sensitized respectively the main dye (NP-1) in solar cells (co-DSSCs). The effects of on photophysical, electrochemical photovoltaic properties co-DSSCs systematically investigated. optimal molecular matching relationship between was obtained through density functional theory (DFT) calculations. Consequently, 4OBA has most appropriate three-dimensional (3D) structure, which could not only fill gap large-size dyes but also plays a partial shielding role, inhibiting aggregation electron recombination, therefore yielding highest power conversion efficiency (PCE) for NP-1@4OBA. This study suggests that adjusting can be used to enhance intramolecular charge transfer inhibit ultimately improving performances co-DSSCs.