Aluminum doped zinc oxide (AZO) can function as effective electronic transport layer (ETL) cum transparent electrode for perovskite solar cells. Measured electronic band diagram shows that AZO/perovskite is a carrier-selective interface that blocks holes but allows transport of electrons. The performance of AZO/perovskite interface is significantly improved by exposing AZO surface to ozone. Ozone depletes carriers from top few nanometers of AZO, forming AZO/un-doped-AZO/perovskite interface with lower recombination losses, resulting in champion cell efficiency of 10.5% and open circuit voltage (Voc) up to 1.05V. AZO interface is also stable. Devices retained 90% of initial Voc even after 60 days of ambient storage.
|Title of host publication||2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|Number of pages||4|
|State||Published - 26 Nov 2018|
|Event||7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - Waikoloa Village, United States|
Duration: 10 Jun 2018 → 15 Jun 2018
|Name||2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC|
|Conference||7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018|
|Period||10/06/18 → 15/06/18|
Bibliographical noteFunding Information:
This work is supported in part under the U.S.−India Partnership to Advance Clean Energy-Research (PACE-R) for the Solar Energy Research Institute for India and the United States (SERIIUS), funded jointly by the U.S. Department of Energy (Office of Science, Office of Basic Energy Sciences, and Energy Efficiency and Renewable Energy, Solar Energy Technology Program, under Subcontract DE-AC36-08GO28308 to the National Renewable Energy Laboratory, Golden, Colorado) and the Government of India (GoI), through the Department of Science and Technology (DST) under Subcontract IUSSTF/JCERDC-SERIIUS/2012 dated 22nd Nov. 2012. The work is also supported by DST, GoI under project reference no: SB/S3/EECE/0163/2014 and Young Faculty Research Fellowship under the “Visvesvaraya PhD Scheme for Electronics & IT” program by MeitY, GoI. We also acknowledge funding from MHRD, MeitY and DST Nano Mission for supporting the facilities at CeNSE.
© 2018 IEEE.
- ozone exposure
- perovskite solar cell