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Published on: February 27, 2017
Enhancing Wide-Bandgap Triple-Halide Perovskites for Tandem Solar Cells by 0.5% Formate and Zn(II) Doping
Le-Ting Wang1, Mary Al Moubayed1, René M Williams1
1Molecular Photonics Group, Van 't Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, P.O. Box 94157, 1090 GD Amsterdam, The Netherlands.
Abstract:
The intrinsic properties of wide-bandgap, triple-cation, triple-halide perovskites, like (Cs0.21FA0.74MA0.05)Pb(I0.81Br0.14Cl0.05)3, can be improved by simultaneous doping with zinc cations (0.5%) as well as formate anions (0.5%). Photoluminescence quantum yields (up to 14% on quartz), as well as photoluminescence lifetimes (up to ~7 µs on quartz), indicate improved optical properties. Based on photoluminescent properties, the optimal total doping concentration of zinc ions (Zn(II)) and formate anions (Fo-) is determined to be 1% relative to Pb(II).
