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Title: Reversible photochromism in ⟨110⟩ oriented layered halide perovskite
Authors: Kanwat, Anil
Ghosh, Biplab
Ng, Si En
Rana, Prem Jyoti Singh
Lekina, Yulia
Hooper, Thomas J. N.
Yantara, Natalia
Kovalev, Mikhail
Chaudhary, Bhumika
Kajal, Priyanka
Febriansyah, Benny
Tan, Qi Ying
Klein, Maciej
Shen, Ze Xiang
Ager, Joel W.
Mhaisalkar, Subodh Gautam
Mathews, Nripan
Keywords: Engineering::Materials::Energy materials
Issue Date: 2022
Source: Kanwat, A., Ghosh, B., Ng, S. E., Rana, P. J. S., Lekina, Y., Hooper, T. J. N., Yantara, N., Kovalev, M., Chaudhary, B., Kajal, P., Febriansyah, B., Tan, Q. Y., Klein, M., Shen, Z. X., Ager, J. W., Mhaisalkar, S. G. & Mathews, N. (2022). Reversible photochromism in ⟨110⟩ oriented layered halide perovskite. ACS Nano.
Project: NRF‐CRP14‐2014‐03 
Journal: ACS Nano 
Abstract: Extending halide perovskites' optoelectronic properties to stimuli-responsive chromism enables switchable optoelectronics, information display, and smart window applications. Here, we demonstrate a band gap tunability (chromism) via crystal structure transformation from three-dimensional FAPbBr3 to a ⟨110⟩ oriented FAn+2PbnBr3n+2 structure using a mono-halide/cation composition (FA/Pb) tuning. Furthermore, we illustrate reversible photochromism in halide perovskite by modulating the intermediate n phase in the FAn+2PbnBr3n+2 structure, enabling greater control of the optical band gap and luminescence of a ⟨110⟩ oriented mono-halide/cation perovskite. Proton transfer reaction-mass spectroscopy carried out to precisely quantify the decomposition product reveals that the organic solvent in the film is a key contributor to the structural transformation and, therefore, the chromism in the ⟨110⟩ structure. These intermediate n phases (2 ≤ n ≤ ∞) stabilize in metastable states in the FAn+2PbnBr3n+2 system, which is accessible via strain or optical or thermal input. The structure reversibility in the ⟨110⟩ perovskite allowed us to demonstrate a class of photochromic sensors capable of self-adaptation to lighting.
ISSN: 1936-0851
DOI: 10.1021/acsnano.1c10098
DOI (Related Dataset): 10.21979/N9/YYMPCK
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Nano, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Fulltext Permission: embargo_20240125
Fulltext Availability: With Fulltext
Appears in Collections:ERI@N Journal Articles
IGS Journal Articles
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