期刊
JOURNAL OF ENERGY CHEMISTRY
卷 54, 期 -, 页码 467-474出版社
ELSEVIER
DOI: 10.1016/j.jechem.2020.06.029
关键词
Improved interfacial property; Inverted planar perovskite solar cells; Passivated trap states; Crystallinity; Ethanediamine
资金
- National Natural Science Foundation of China [51672288, 21975273]
- Dalian National Laboratory for Clean Energy (DICPQIBEBT) [UN201705]
- Qingdao Postdoctoral Application Research Project [2018183, 2018186]
- Taishan Scholars Program of Shandong Province
- Scientific Research Cooperation Foundation of Qingdao Institute of Bioenergy and Bioprocess Technology
By using ethanediamine to construct a novel polyelectrolyte hole transport material, the interfacial properties of inverted planar perovskite solar cells can be optimized to improve the power conversion efficiency.
We report a simple and effective method to realize desirable interfacial property for inverted planar perovskite solar cells (PSCs) by using small molecule ethanediamine for the construction of a novel polyelectrolyte hole transport material (P3CT-ED HTM). It is found that P3CT-ED can not only improve the hole transport property of P3CT-K but also improve the crystallinity of adjacent perovskite film. In addition, the introduction of ethanediamine into P3CT realigns the conduction and valence bands upwards, passivates surface defects and reduces non-radiative recombination. As a consequence, compared to P3CT-K hole transport layer (HTL) based devices, the average power conversion efficiency (PCE) is boosted from 17.2% to 19.6% for the counterparts with P3CT-ED, with simultaneous enhancement in open circuit voltage and fill factor. The resultant device displays a champion PCE of 20.5% with negligible hysteresis. (C) 2020 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.
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