Phenoxazine Derivative Operates as an Efficient Surface-Grafted Molecular Relay to Enhance the Performance and Stability of CdS- and CdSe-Sensitized TiO2 Solar Cells

作者：Shen Chao; Wang Xingzhu; Tang Shasha; Courte Marc; Fichou Denis

来源：ChemPhysChem, 2017, 18(10): 1302-1307.

DOI：10.1002/cphc.201700238

• cadmium
• energy conversion
• redox chemistry
• semiconductors
• sensitizers
• thin films

We report on a new phenoxazine derivative, 10-butyl-phenoxazine-3-carboxylic acid (BPCA), that we designed to operate as a molecular relay in semiconductor-sensitized solar cells (SSCs). After BPCA surface modification and in the presence of a cobalt-bipyridyl complex acting as a redox mediator, both TiO2/CdS/BPCA and TiO2/CdSe/BPCA SSCs exhibit enhanced photovoltaic performance and stability. In particular, the power conversion efficiencies of CdS and CdSe-based solar cells are improved by 90% and 57 %, respectively. Furthermore, after 300 s the J(SC) of TiO2/CdS/BPCA SSCs is stabilized at 30% of its initial value, while in the same time CdS-based devices retain only 1% of their initial J(SC). The origin of the improvement arises from the excellent electron-donating property of BPCA and its role as a powerful molecular relay in non-polysulfide based SSCs.

• 出版日期2017-5-19
• 单位南阳理工学院