New Strategies for Defect Passivation in High-Efficiency Perovskite Solar Cells

Lead halide perovskite solar cells now show excellent efficiencies and encouraging levels of stability. Further improvements in performance require better control of the trap states which are considered to be associated with vacancies and defects at crystallite surfaces. Herein, a reflection on the ways in which these traps can be mitigated is presented by improving the quality of the perovskite layer and interfaces in fully assembled device configurations. In this review, the most recent design strategies reported in the literature, which have been explored to tune grain orientation, to passivate defects, and to improve charge-carrier lifetimes, are presented. Specifically, the advances made with single-cation, mixed-cation and/or mixed-halide, and 3D/2D bilayer-based light absorbers are discussed. The interfacial, compositional, and band alignment engineering along with their consequent effects on the open-circuit voltage, power conversion efficiency, and stability are a particular focus.


Published in:
Advanced Energy Materials, 1903090
Year:
Nov 19 2019
Publisher:
Weinheim, WILEY-V C H VERLAG GMBH
ISSN:
1614-6832
1614-6840
Keywords:
Laboratories:




 Record created 2019-11-29, last modified 2020-04-20


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