期刊
ACS ENERGY LETTERS
卷 6, 期 3, 页码 925-933出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.0c02406
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资金
- Australian Government through the Australian Renewable Energy Agency (ARENA)
- New Energy and Industrial Technology Development Organization (NEDO)
- Japan Science and Technology Agency (JST) Advanced Low Carbon Technology Research and Development Program (ALCA) [JPMJAL1603]
- JSPS KAKENHI [JP20F20031]
Research shows that ambient storage can improve the efficiency of perovskite solar cells, mainly due to defect passivation, changes in charge recombination mechanism, and enhanced charge extraction efficiency.
Initial improvement in power conversion efficiency (PCE) during ambient storage is often seen in perovskite solar cells (PSCs). In this work, we studied the origin of PCE enhancement by ambient storage on typical n-i-p PSCs. We found improvements in both fill factor and open-circuit voltage during the first 2 days of storage. By analyzing temperature and light intensity-dependent V-OC, we found that the charge recombination mechanism changed from surface- to bulk-dominated because of defect passivation at the perovskite surface upon storage. In addition, we found that storage improves the conductivity and lowers the highest occupied molecular orbital level of the spiro-OMeTAD, improving charge extraction. These results show that there is more than one factor causing the storage-induced improvements in perovskite solar cells.
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