Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 5, Issue 5, Pages 1972-1977Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ta07004c
Keywords
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Funding
- National Research Foundation of Korea (NRF) [2011-0030253]
- National Research Foundation of Korea [22A20150013275] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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One of the current needs of applications involving perovskite solar cells is reducing the hysteresis of the current density-voltage response with respect to the scan direction and rate. This reduction enables high and stable power conversion efficiency (eta). For this purpose, a mesoscopic electron conductor with low trap density and high electron conductivity that balances charge flux is highly desirable. In the present study, we prepared a mesoscopic inverse opal (meso-IO) film with a three-dimensionally interconnected porous structure and used it as an electron-conducting scaffold for perovskite solar cells. We controlled the thickness of the meso-IO scaffold and determined its effect on the cells' photovoltaic performance. Solar cells using the 600 nm thick meso-IO scaffold exhibited a maximum eta of 17.1%, no hysteresis of photocurrent density between forward and reverse scan directions, as well as hysteresis of eta of only 0.5% p.
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