Wang Jianming, Yu Huangzhong, Hou Chunli
School of Physics and Optoelectronics, South China University of Technology, 510640 Guangzhou, China.
Nanoscale. 2021 Apr 14;13(14):6871-6883. doi: 10.1039/d1nr00470k. Epub 2021 Mar 30.
Due to the excellent electrical and optical properties, few-layered β-indium selenide (InSe) nanosheets are successfully introduced into the active layer of polymer solar cells (PSCs) as the third component for the first time. The addition of few-layered β-InSe nanosheets optimizes the absorption, crystallinity and vertical component distribution of the active layer. Compared with the binary devices, the ternary devices exhibit optimized bulk morphology and reduced charge recombination. The power conversion efficiency (PCE) of PSCs based on the PM6 : Y6 system is obviously improved from 15.02% to 16.56% due to the increasing short-circuit current and fill factor. The mechanism accounting for the morphological change in the ternary active layer is investigated in depth. Moreover, the efficacy of β-InSe in long-term stability and other active layer systems of PSCs is confirmed. Therefore, this work demonstrates that few-layered β-InSe has bright prospects in photovoltaic devices.
由于具有优异的电学和光学性能，少层β-硒化铟（InSe）纳米片首次作为第三组分成功引入聚合物太阳能电池（PSC）的活性层。少层β-InSe纳米片的加入优化了活性层的吸收、结晶度和垂直组分分布。与二元器件相比，三元器件呈现出优化的本体形态并减少了电荷复合。基于PM6:Y6体系的PSC的功率转换效率（PCE）由于短路电流和填充因子的增加而从15.02%显著提高到16.56%。深入研究了三元活性层形态变化的机理。此外，还证实了β-InSe在PSC的长期稳定性和其他活性层体系中的有效性。因此，这项工作表明少层β-InSe在光电器件中具有广阔的前景。
