Novel Lead-Free Material Cs2PtI6 with Narrow Bandgap and Ultra-Stability for Its Photovoltaic Application
Novel Lead-Free Material Cs2PtI6 with Narrow Bandgap and Ultra-Stability for Its Photovoltaic Application
复制标题
具有窄带隙和超稳定性的新型无铅材料Cs2PtI6用于光伏应用
DOI：
10.1021/acsami.0c11429
复制
发表时间：
2020
影响因子：
9.5
通讯作者：
Ma Tingli
中科院分区：
文献类型：
--
作者：
Yang Shuzhang;Wang Liang;Zhao Shuai;Liu Anmin;Zhou Yi;Han Qianji;Yu Fengyang;Gao Liguo;Zhang Chu;Ma Tingli
卤化铅钙钛矿材料由于其优异的物理化学性能和上级光电性能，近年来受到了广泛的关注。然而，一些限制仍然阻碍了该材料的完全工业化，特别是毒性问题和对湿度敏感导致的不稳定性。因此，无铅全无机双钙钛矿材料近年来成为研究的热点。在此，提出了一种新的具有高质量Cs2 PtI 6薄膜的窄带隙无铅双钙钛矿太阳能电池。它具有1.37 eV的光学带隙，在宽波长范围内的吸收，和高吸收系数。优化后，器件显示出最佳的功率转换效率为0.72%，开路电压为0.73 V，短路电流为1.2 mA/cm 2，填充因子为0.82。至关重要的是，它在暴露于极端条件（如高湿度，高温和紫外线照射）时也表现出出色的稳定性。稳定性测试表明，PSC在环境温度下储存60天后，在没有任何封装的情况下，可以保持近80%的原始效率，从而提高了无铅钙钛矿太阳能电池的应用前景。
Lead halide perovskite has in recent years gained widespread interest due to its excellent physical and chemical properties, as well as superior optoelectronic performance. However, some restrictions still preclude full industrialization of the material, in particular toxicity issues and instability as a result to sensitivity to humidity. Lead-free all-inorganic double perovskite materials have thus recently become a focus of research. Herein, a new narrow bandgap lead-free double perovskite solar cell with a high-quality Cs2PtI6film is proposed. It exhibits an optical bandgap of 1.37 eV, absorption within a wide range of wavelengths, and a high absorption coefficient. Following optimization, the device displays a best power conversion efficiency of 0.72% with an open-circuit voltage of 0.73 V, a short-circuit current of 1.2 mA/cm2, and a fill factor of 0.82. Crucially, it also demonstrates excellent stability when exposed to extreme conditions such as high humidity, high temperature, and UV-light irradiation. Stability tests show that the PSCs can retain almost 80% of the original efficiency over 60 days stored in ambient temperature without any encapsulation, boosting prospects for applications of lead-free perovskite solar cells.