Strain-activated light-induced halide segregation in mixed-halide perovskite solids

Yicheng Zhao (), Peng Miao, Jack Elia, Huiying Hu, Xiaoxia Wang, Thomas Heumueller, Yi Hou, Gebhard J. Matt, Andres Osvet, Yu-Ting Chen, Mariona Tarragó, Dominique Ligny, Thomas Przybilla, Peter Denninger, Johannes Will, Jiyun Zhang, Xiaofeng Tang, Ning Li, Chenglin He, Anlian Pan, Alfred J. Meixner, Erdmann Spiecker, Dai Zhang () and Christoph J. Brabec ()
Additional contact information
Yicheng Zhao: Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
Peng Miao: University of Tübingen
Jack Elia: Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
Huiying Hu: Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
Xiaoxia Wang: Hunan University
Thomas Heumueller: Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
Yi Hou: Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
Gebhard J. Matt: Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
Andres Osvet: Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
Yu-Ting Chen: University of Tübingen
Mariona Tarragó: University of Erlangen-Nuremberg
Dominique Ligny: University of Erlangen-Nuremberg
Thomas Przybilla: Friedrich-Alexander-Universität Erlangen-Nürnberg
Peter Denninger: Friedrich-Alexander-Universität Erlangen-Nürnberg
Johannes Will: Friedrich-Alexander-Universität Erlangen-Nürnberg
Jiyun Zhang: Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
Xiaofeng Tang: Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
Ning Li: Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
Chenglin He: Hunan University
Anlian Pan: Hunan University
Alfred J. Meixner: University of Tübingen
Erdmann Spiecker: Friedrich-Alexander-Universität Erlangen-Nürnberg
Dai Zhang: University of Tübingen
Christoph J. Brabec: Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)

Nature Communications, 2020, vol. 11, issue 1, 1-9

Abstract: Abstract Light-induced halide segregation limits the bandgap tunability of mixed-halide perovskites for tandem photovoltaics. Here we report that light-induced halide segregation is strain-activated in MAPb(I1−xBrx)3 with Br concentration below approximately 50%, while it is intrinsic for Br concentration over approximately 50%. Free-standing single crystals of CH3NH3Pb(I0.65Br0.35)3 (35%Br) do not show halide segregation until uniaxial pressure is applied. Besides, 35%Br single crystals grown on lattice-mismatched substrates (e.g. single-crystal CaF2) show inhomogeneous segregation due to heterogenous strain distribution. Through scanning probe microscopy, the above findings are successfully translated to polycrystalline thin films. For 35%Br thin films, halide segregation selectively occurs at grain boundaries due to localized strain at the boundaries; yet for 65%Br films, halide segregation occurs in the whole layer. We close by demonstrating that only the strain-activated halide segregation (35%Br/45%Br thin films) could be suppressed if the strain is properly released via additives (e.g. KI) or ideal substrates (e.g. SiO2).

Date: 2020
References: Add references at CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.nature.com/articles/s41467-020-20066-7 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-20066-7

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-020-20066-7

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().