期刊
JOULE
卷 4, 期 6, 页码 1263-1277出版社
CELL PRESS
DOI: 10.1016/j.joule.2020.04.013
关键词
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资金
- Science and Technology Program of Sichuan Province [2017GZ0052, 2020YFH0079, 2020JDJQ0030]
- National Energy NovelMaterials Center Project [NENMC-I-1701]
- Fundamental Research Funds for the Central Universities [YJ201722, YJ201955]
- China Scholarship Council
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 cm(2) perovskite 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.
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