Stabilized tilted-octahedra halide perovskites inhibit local formation of performance-limiting phases-Reference-Cited by-同舟云学术

Stabilized tilted-octahedra halide perovskites inhibit local formation of performance-limiting phases

Published:2021-12-24 Issue:6575 Volume:374 Page:1598-1605
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Doherty Tiarnan A. S.¹^ORCID,Nagane Satyawan¹^ORCID,Kubicki Dominik J.¹²^ORCID,Jung Young-Kwang³^ORCID,Johnstone Duncan N.⁴^ORCID,Iqbal Affan N.¹⁵^ORCID,Guo Dengyang¹⁵^ORCID,Frohna Kyle¹^ORCID,Danaie Mohsen⁶⁷^ORCID,Tennyson Elizabeth M.¹^ORCID,Macpherson Stuart¹^ORCID,Abfalterer Anna¹^ORCID,Anaya Miguel¹⁵^ORCID,Chiang Yu-Hsien¹^ORCID,Crout Phillip⁴^ORCID,Ruggeri Francesco Simone⁸^ORCID,Collins Sean⁹^ORCID,Grey Clare P.²^ORCID,Walsh Aron³¹⁰^ORCID,Midgley Paul A.⁴^ORCID,Stranks Samuel D.¹⁵^ORCID

Affiliation:

1. Department of Physics, Cavendish Laboratory, University of Cambridge, Cambridge, UK.

2. Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, UK.

3. Department of Materials Science and Engineering, Yonsei University, Seoul, Korea.

4. Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, UK.

5. Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, UK.

6. Electron Physical Science Imaging Centre, Diamond Light Source Ltd., Didcot, UK.

7. Department of Materials, University of Oxford, Oxford, UK.

8. Laboratories of Organic and Physical Chemistry, Wageningen University and Research, Wageningen, Netherlands.

9. School of Chemical and Process Engineering and School of Chemistry, University of Leeds, Leeds, UK.

10. Department of Materials, Imperial College London, London, UK.

Abstract

Stable but not quite cubic The black, photoactive phase of formamidinium (FA) perovskites, which is usually stabilized by cation alloying to avoid the formation of inactive hexagonal phases, is assumed to be cubic. High-resolution microscopy studies by Doherty et al . using nanoscale probes revealed that these FA-rich phases are not cubic but rather undergo slight tilting (by two degrees) of the octahedra. Black phases can have localized regions of hexagonal phases that nucleate degradation. Surface-bound ethylenediaminetetraacetic acid stabilized the tilted phase of pure FA lead triiodide against environmental degradation. —PDS

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference63 articles.

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4. High-performance photovoltaic perovskite layers fabricated through intramolecular exchange

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