期刊
ACS ENERGY LETTERS
卷 7, 期 10, 页码 3646-3652出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.2c01648
关键词
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类别
资金
- National Natural Science Foundation of China
- Youth Innovation Promotion Association of the Chinese Academy of Sciences
- National Key R&D Program of China
- Beijing National Laboratory for Molecular Sciences
- [22279149]
- [52003273]
- [22073107]
- [91963212]
- [51961145102]
- [2022034]
- [2018YFA0208501]
- [BNLMS-CXXM-202005]
This study proposes a molecular modification strategy to assist defect passivation, enhancing the stability of perovskite solar modules and preventing UV degradation.
Defects weaken the stability of perovskite solar modules (PSMs) and aggravate the photodegradation process under continuous illumination (especially, UV light), limiting the competitiveness and commercial development of perovskite photovoltaics. Herein, we propose a tautomeric passivation strategy toward molecular isomerism passivation, 2,3-Bis(2,4,5-trimethyl-3-thienyl) maleimide (DAE), to assist defect passivation for photostable PSMs with sustainable UV protection. The tautomeric DAE molecule in the perovskite film after UV irradiation presents high charge density difference values (-0.182e for-C=O-Pb; 0.015e for N-H center dot center dot center dot I-) and efficiently improves the defect formation energy, preventing perovskite UV degradation through the free closed and open rings of the DAE molecule in the PSM. The DAE PSCs exhibit champion efficiencies up to 24.12% (small area: 0.08 cm2) and 18.47% (module area: 25 cm2) as well as long-term UV photostability, continuously charging a mobile phone through a DAE-PSM even on a cloudy day.
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