Efficient Perovskite Solar Modules with Minimized Nonradiative Recombination and Local Carrier Transport Losses
Efficient Perovskite Solar Modules with Minimized Nonradiative Recombination and Local Carrier Transport Losses
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DOI：
10.1016/j.joule.2020.04.013
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发表时间：
2020-06
期刊：
影响因子：
39.8
通讯作者：
A. Ren;Huagui Lai;X. Hao;Zeguo Tang;Hao Xu;B. Y. Jeco;Kentaroh Watanabe;Lili Wu;Jingquan Zhang-Jingq
中科院分区：
文献类型：
--
作者：
A. Ren;Huagui Lai;X. Hao;Zeguo Tang;Hao Xu;B. Y. Jeco;Kentaroh Watanabe;Lili Wu;Jingquan Zhang-Jingq
永久性太阳能电池（PSC）在功率转换效率（PCE）方面取得了快速发展。然而，现有技术的PSC仍然遭受非均匀分布的非辐射复合和载流子传输损耗。在这里，我们报告了一个有前途的评估策略相结合的广义光电互易定理和基于相机的发光成像技术的PSC。过量的氯化铅成分工程增加了均匀性并抑制了非辐射复合，导致器件的外部发光效率为1.14%（对应于0.116 V的非辐射电压损失）。在中等光照条件下，在最大功率点处也观察到了良好的局部和全局载波提取特性。因此，我们实现了25.49 cm2的钙钛矿太阳能组件，具有17.88%的认证效率和超过78%的创纪录填充因子。这种定量和空间分辨的表征适用于特定的操作点，为未来实验室规模设备的实时跟踪和大面积模块筛选的快速评估提供了巨大的潜力。
Perovskite solar cells (PSCs) have seen rapid advance in power conversion efficiencies (PCEs). However, the state-of-the-art PSCs still suffer from inhomogeneously distributed nonradiative recombination and carrier transport losses. Here, we report a promising evaluation strategy of combining the generalized optoelectronic reciprocity theorems and camera-based luminescence imaging techniques for PSCs. Excess lead chloride compositional engineering increases homogeneity and suppresses nonradiative recombination, leading to an external luminescence efficiency of 1.14% of devices (corresponding to a nonradiative voltage loss of 0.116 V). A favorable local and global carrier extraction property at maximum power point is also observed under moderate illumination level. As a result, we achieve a 25.49 cm2perovskite solar module with a 17.88%-certified efficiency and a record fill factor over 78%. This quantitative and spatially resolved characterization is applicable at specific operating points, offering enormous potential for future real-time tracking of the lab-scaled devices and fast assessment of screening the large-area modules.