Efficient Perovskite Solar Modules with Minimized Nonradiative Recombination and Local Carrier Transport Losses
| Autor: | Kentaroh Watanabe, Dewei Zhao, Lili Wu, Zeguo Tang, Masakazu Sugiyama, Jiang Wu, Bernice Mae F. Yu Jeco, Aobo Ren, Xia Hao, Jingquan Zhang, Huagui Lai, Hao Xu |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Maximum power principle business.industry Spatially resolved 02 engineering and technology Electroluminescence 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences General Energy Solar module Optoelectronics Fill factor 0210 nano-technology Luminescence business Recombination Voltage |
| Zdroj: | Joule. 4:1263-1277 |
| ISSN: | 2542-4351 |
| Popis: | Summary 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 cm2 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. |
| Databáze: | OpenAIRE |
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