Journal
IEEE JOURNAL OF PHOTOVOLTAICS
Volume 7, Issue 6, Pages 1681-1686Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JPHOTOV.2017.2751506
Keywords
Disorder; exciton; photovoltaic cell
Funding
- Human Resources Development of Korea Institute of Energy Technology Evaluation and Planning - Korea government Ministry of Trade, Industry and Energy [20124010203170]
- Global Frontier R&D Program on Center for Multiscale Energy System - National Research Foundation under Ministry of Science, ICT & Future, South Korea [2011-0031567]
- LG Chem, Ltd., South Korea
- Mid-Career Researcher Program - National Research Foundation of Korea [2016R1A2B3009301]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20124010203170] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2016R1A2B3009301] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We present the analysis of photovoltaic properties in perovskite solar cells to explore the impact of excitonic features, disorder, recombination, and space charge effects using temperature and photo-intensity dependence. Photo-intensity dependence reveals an enhancement of classical Einstein relation due to the presence of traps and formation of space charge effects resulting in reduced conductivity. Exciton versus free charge density upon photo-excitation is analyzed from temperature dependence of photocurrent. Temperature dependence of V-OC is excellently explained by considering a combined energetic disorder in a solar cell, and a moderately high value of variance similar to 125 meV is obtained.
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