Monolithic perovskite/silicon tandem solar cell with >29% efficiency by enhanced hole extraction
Monolithic perovskite/silicon tandem solar cell with >29% efficiency by enhanced hole extraction
复制标题
DOI：
10.1126/science.abd4016
复制
发表时间：
2020-12-11
期刊：
影响因子：
56.9
通讯作者：
Albrecht, Steve
中科院分区：
文献类型：
--
作者：
Al-Ashouri, Amran;Kohnen, Eike;Albrecht, Steve
将硅与金属卤化物钙钛矿配对的串联太阳能电池是超越单电池效率极限的有希望的选择。我们报告了单片钙钛矿/硅串联，其认证的功率转换效率为29.15%。的钙钛矿吸收剂，具有1.68电子伏特的带隙，保持相稳定的照明下，通过快速空穴提取和最小化的非辐射复合在空穴选择性界面的组合。这些功能是通过自组装的，甲基取代的咔唑单层作为钙钛矿电池中的空穴选择性层。加速的空穴提取与1.26的低理想因子和高达84%的单结填充因子有关，同时能够实现高达1.92伏的串联开路电压。在空气中，没有封装，串联保持95%的初始效率后，300小时的操作。
Tandem solar cells that pair silicon with a metal halide perovskite are a promising option for surpassing the single-cell efficiency limit. We report a monolithic perovskite/silicon tandem with a certified power conversion efficiency of 29.15%. The perovskite absorber, with a bandgap of 1.68 electron volts, remained phase-stable under illumination through a combination of fast hole extraction and minimized nonradiative recombination at the hole-selective interface. These features were made possible by a self-assembled, methyl-substituted carbazole monolayer as the hole-selective layer in the perovskite cell. The accelerated hole extraction was linked to a low ideality factor of 1.26 and single-junction fill factors of up to 84%, while enabling a tandem open-circuit voltage of as high as 1.92 volts. In air, without encapsulation, a tandem retained 95% of its initial efficiency after 300 hours of operation.