The efficiency of perovskite photovoltaic cells is greatly impacted by the anomalous hysteresis effect. It is found that by applying a forward bias prior to testing, device efficiency (ηp) can be significantly improved. This bias poling effect can be stabilized at temperatures ≤250 K. As a result, hysteresis free operation of a planar perovskite photovoltaic cell is achieved at 170 K with ηp of 19%.
Bibliographical noteFunding Information:
This work was supported by the National Science Foundation (NSF) MRSEC Program under Award No. DMR-0819885 and through the NSF PREM Program under Award No. DMR-0934157. Support was also received from the University of Minnesota Initiative for Renewable Energy and the Environment. Y.Z. acknowledges support from a University of Minnesota Doctoral Dissertation Fellowship.
© 2016 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
- bias poling
- perovskite photovoltaic cells
- solar cells