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Halide segregation in mixed-halide perovskites: influence of a-site cations

Abstract:

Mixed-halide perovskites offer bandgap tunability essential for multijunction solar cells; however, a detrimental halide segregation under light is often observed. Here we combine simultaneous in situ photoluminescence and X-ray diffraction measurements to demonstrate clear differences in compositional and optoelectronic changes associated with halide segregation in MAPb(Br0.5I0.5)3 and FA0.83Cs0.17Pb(Br0.4I0.6)3 films. We report evidence for low-barrier ionic pathways in MAPb(Br0.5I0.5)3, wh...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1021/acsenergylett.0c02475

Authors


More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Condensed Matter Physics
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Condensed Matter Physics
Role:
Author
ORCID:
0000-0001-7973-6907
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Condensed Matter Physics
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Condensed Matter Physics
Role:
Author
ORCID:
0000-0001-5132-1232
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Condensed Matter Physics
Role:
Author
More from this funder
Name:
Engineering & Physical Sciences Research Council
Grant:
EP/P006329/1
More from this funder
Name:
Engineering and Physical Sciences Research Council
Grant:
EP/S004947/1
Publisher:
American Chemical Society
Journal:
ACS Energy Letters More from this journal
Volume:
6
Issue:
2
Pages:
799-808
Place of publication:
United States
Publication date:
2021-02-01
Acceptance date:
2021-01-27
DOI:
EISSN:
2380-8195
Language:
English
Keywords:
Pubs id:
1161329
Local pid:
pubs:1161329
Deposit date:
2021-03-30

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