Indexed by:期刊论文
Date of Publication:2017-04-07
Journal:JOURNAL OF MATERIALS CHEMISTRY C
Included Journals:SCIE、EI
Volume:5
Issue:13
Page Number:3283-3287
ISSN No.:2050-7526
Abstract:The great strides of perovskite-based photovoltaic devices galvanize an increasing number of material studies. We revealed the photoinduced steady-state free carrier densities of perovskite films through a purely optical detection method. The method avoided the possible interference from strong ionic conductivity within perovskite materials. The densities were measured at the order of 10(15) cm(-3) and 10(16) cm(-3) for CH3NH3PbI3 films without and with chlorine introduction, respectively. Long free carrier lifetimes were figured out according to the densities. The densities were found to increase, as observed from the illumination, following a sublinear power law. This indicates sub-bandgap trapping states involved in the charge accumulation mechanism. In addition, the densities presented an abnormal temperature sensitivity revealing a thermally activated recombination channel above similar to 240 K.
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Supervisor of Doctorate Candidates
Supervisor of Master's Candidates
Gender:Male
Alma Mater:清华大学
Degree:Doctoral Degree
School/Department:化学学院
Discipline:Physical Chemistry (including Chemical Physics). Materials Physics and Chemistry. Inorganic Chemistry
Business Address:西部校区化工综合楼C313
Contact Information:0411-84986237
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