期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 549, 期 -, 页码 33-41出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2019.04.052
关键词
All-inorganic PSCs; AIGS QDs; Power conversion efficiency
资金
- National Natural Science Foundation of China [11564026, 11774141, 61765011, 51863016]
- Outstanding Youth Funds of Jiangxi Province [20171BCB23051, 20171BCB23052]
- Natural Science Foundation of Jiangxi Province [20181BAB201016, 20181BBE58005, 20181BAB202028, 20181BBE50022, 20171BAB202036, 20171BAB216017, 20161BAB212035]
- Science and Technology Project of the education department of Jiangxi Province, China [GJJ170582, GJJ170591]
The severe interface charge recombination caused by the large energy difference between perovskite material and carbon electrode significantly limits the further performance improvement of the all-inorganic perovskite solar cells (PSCs). We apply innovatively multilayer of quaternary Ag-In-Ga-S (AIGS) quantum dots (QDs) with cascade-like valence bands as hole-transport materials to assemble all-inorganic PSCs, and the resultant all-inorganic PSCs exhibit a power conversion efficiency (PCE) of 8.46%, which is enhanced by 20.9% in comparison with 7% for the pristine device. The high performance of the PSCs indicates that sequential layers of AIGS QDs with cascade-like energy levels can facilitate the charge separation, reduce the barrier the holes crossing and suppress the charge recombination. Stack of QDs with cascade-like energy levels provide solution-processed PSCs with a new method to enhance device performance. (C) 2019 Elsevier Inc. All rights reserved.
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