Zhang Yanan, Wang Pengfei, Zhang Tengyue, Gou Bingwang
College of Materials Science & Engineering, Nanjing Tech University, Nanjing 211816, China.
China Research and Development Academy of Machinery Equipment, Beijing 100089, China.
ACS Omega. 2020 Sep 17;5(38):24898-24905. doi: 10.1021/acsomega.0c03686. eCollection 2020 Sep 29.
Composite counter electrodes have been shown to be a practical and effective strategy in dye-sensitized solar cell (DSSC) application. In this work, we designed and prepared a single-crystal CuZnSnSe (CZTSe) plate structure on flexible carbon fabric as a DSSC cathode, which combines the best of the two worlds, namely, the superior catalytic activity and hierarchical microstructure of kesterite CZTSe and the high conductivity and expanded framework of carbon fabric. The composite counter electrode presented a power conversion efficiency of 8.45% and a long-term bending reservation. The remarkable device property is due to the high catalytic activity, good adherence to conductive matrix grains, effective electron migration, and quick iodide species diffusion of the novel cathode. Our results suggest that the CZTSe@carbon fabric composite could be a high-efficiency Pt-free cathode in DSSCs.
复合对电极已被证明是染料敏化太阳能电池（DSSC）应用中的一种实用且有效的策略。在这项工作中，我们在柔性碳织物上设计并制备了单晶CuZnSnSe（CZTSe）板结构作为DSSC阴极，它兼具了两者的优点，即锌黄锡矿型CZTSe的优异催化活性和分级微观结构以及碳织物的高导电性和扩展框架。该复合对电极的功率转换效率为8.45%，并且具有长期的弯曲稳定性。这种显著的器件性能归因于新型阴极的高催化活性、与导电基体晶粒的良好附着力、有效的电子迁移以及碘化物物种的快速扩散。我们的结果表明，CZTSe@碳织物复合材料可能是DSSC中一种高效的无铂阴极。
