期刊
CHEMPHYSCHEM
卷 17, 期 1, 页码 112-118出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cphc.201500844
关键词
energy conversion; mesoporous materials; perovskite solar cells; semiconductors; spin coating
资金
- National Natural Science Foundation of China [91433205, 51402348, 51421002, 21173260, 11474333, 91233202]
- Ministry of Science and Technology (973 Project) [2012CB932903, 2012CB932904]
- Knowledge Innovation Program of Chinese Academy of Sciences
Moisture is shown to activate the reaction between PbI2 and methylammonium halides. In addition, two activating mechanisms are proposed for the formation of CH3NH3PbI3 and CH3NH3PbI3-xClx films from a series of carefully controlled experiments. When these rapidly formed perovskite films are directly fabricated into the devices, poor photovoltaic properties are found, due to heavy surface charge recombination. However, the cell performance can be significantly enhanced to 13.63% and to over 12% in the steady state for CH3NH3PbI3 and to 15.50% and over 14% in the steady state for CH3NH3PbI3-xClx, if the rapidly formed perovskite film is annealed. Thus, it is believed that moisture (below 60% RH) is not a problem for the fabrication of highly efficient perovskite solar cells.
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