期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 6, 期 3, 页码 1161-1170出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ta08204e
关键词
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资金
- National Natural Science Foundation of China [61540016, 61674109, 11605278, 11675252]
- National Key R&D Program of China [2016YFA0202400]
- Natural Science Foundation of Jiangsu Province [BK20170059]
- Collaborative Innovation Center of Suzhou Nano Science and Technology (Nano-CIC)
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
We develop an external-electric-field (EEF)-assisted annealing treatment to improve the photoelectric performance of planar organic-inorganic perovskite solar cells (PSCs). The new strategy can control the ion polarization orientation of perovskite films to obtain a good crystallization film and enhance the built-in electric field (BIF), which facilitates the effective promotion of charge separation and transport. Under an optimized treatment of up-EEF-assisted (2.5 V mu m(-1)) annealing, the power conversion efficiency (PCE) of the inverted PSC is improved from 15.33% to 17.26%, and from 16.77% to 19.18% for regular PSCs, compared with the thermal-annealing-only process. The ion polarization and ferroelectricity in the perovskite layer induced by the EEF are intensively discussed. The finding in this work provides a new route to improve perovskite film quality and cell performance.
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