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Research Update : Recombination and open-circuit voltage in lead-halide perovskites

Kirchartz, Thomas; Krückemeier, Lisa and Unger, Eva L. LU (2018) In APL Materials 6(10).
Abstract

The high open-circuit voltage and the slow recombination in lead-halide perovskite solar cells has been one of the main contributors to their success as photovoltaic materials. Here, we review the knowledge on recombination in perovskite-based solar cells, compare the situation with silicon solar cells, and introduce the parameters used to describe recombination and open-circuit voltage losses in solar cells. We first discuss the effect of lifetimes and surface recombination velocities on photovoltaic performance before we study the microscopic origin of charge-carrier lifetimes. The lifetimes depend on defect positions and densities and on the kinetic prefactors that control the phonon-assisted interaction between the extended states... (More)

The high open-circuit voltage and the slow recombination in lead-halide perovskite solar cells has been one of the main contributors to their success as photovoltaic materials. Here, we review the knowledge on recombination in perovskite-based solar cells, compare the situation with silicon solar cells, and introduce the parameters used to describe recombination and open-circuit voltage losses in solar cells. We first discuss the effect of lifetimes and surface recombination velocities on photovoltaic performance before we study the microscopic origin of charge-carrier lifetimes. The lifetimes depend on defect positions and densities and on the kinetic prefactors that control the phonon-assisted interaction between the extended states in the conduction and valence band and the localized defect states. We finally argue that the key to understand the long lifetimes and high open-circuit voltages is a combination of a low density of deep defects and a slow dissipation of energy via multiphonon processes due to the low phonon energies in the lead-halide perovskites.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
APL Materials
volume
6
issue
10
publisher
American Institute of Physics
external identifiers
  • scopus:85055335998
ISSN
2166-532X
DOI
10.1063/1.5052164
language
English
LU publication?
yes
id
bedd1cf8-4d1f-4fd2-a9cb-0ec36ad3c6ee
date added to LUP
2018-11-16 08:55:41
date last changed
2019-02-20 11:36:23
@article{bedd1cf8-4d1f-4fd2-a9cb-0ec36ad3c6ee,
  abstract     = {<p>The high open-circuit voltage and the slow recombination in lead-halide perovskite solar cells has been one of the main contributors to their success as photovoltaic materials. Here, we review the knowledge on recombination in perovskite-based solar cells, compare the situation with silicon solar cells, and introduce the parameters used to describe recombination and open-circuit voltage losses in solar cells. We first discuss the effect of lifetimes and surface recombination velocities on photovoltaic performance before we study the microscopic origin of charge-carrier lifetimes. The lifetimes depend on defect positions and densities and on the kinetic prefactors that control the phonon-assisted interaction between the extended states in the conduction and valence band and the localized defect states. We finally argue that the key to understand the long lifetimes and high open-circuit voltages is a combination of a low density of deep defects and a slow dissipation of energy via multiphonon processes due to the low phonon energies in the lead-halide perovskites.</p>},
  articleno    = {100702},
  author       = {Kirchartz, Thomas and Krückemeier, Lisa and Unger, Eva L.},
  issn         = {2166-532X},
  language     = {eng},
  number       = {10},
  publisher    = {American Institute of Physics},
  series       = {APL Materials},
  title        = {Research Update : Recombination and open-circuit voltage in lead-halide perovskites},
  url          = {http://dx.doi.org/10.1063/1.5052164},
  volume       = {6},
  year         = {2018},
}