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Title: Phase Stability and Diffusion in Lateral Heterostructures of Methyl Ammonium Lead Halide Perovskites

Abstract

Mixed-halide hybrid organic inorganic perovskites have band gaps that span the visible spectrum making them candidates for optoelectronic devices. Diffusion of the halide atoms in methyl ammonium lead iodide (MAPbI3) and its alloys with bromine has been observed in both dark and under illumination. While halide transport upon application of electric fields has received much attention, less is known regarding bromide and iodide interdiffusion down concentration gradients. This work provides an upper bound on the bromide-iodide interdiffusion coefficient $$D_i$$, in thin films of (MAPbBrxI1-x)3 using a diffusion couple of a lateral heterostructure. The upper bound of $$D_i$$ was extracted from changes in the interface profiles of the heterostructures upon exposure to heat. The stability of thoroughly-heated interfacial profiles suggests that the miscibility gap extends to higher temperatures and to a higher fractional composition of bromine than predicted by theory. The results of this work provide guidance for compositions of thermally stable heterostructures of hybrid halide perovskites.

Authors:
 [1];  [1];  [2];  [3]; ORCiD logo [4]; ORCiD logo [5];  [1]; ORCiD logo [1]
  1. Univ. of California, Santa Barbara, CA (United States). Dept. of Materials
  2. Mitsubishi Chemical Corporation (Japan). Electronics Materials and New Energy Lab.; Univ. of California, Santa Barbara, CA (United States). Dept. of Materials
  3. Mitsubishi Chemical Corporation (Japan). Electronics Materials and New Energy Lab.
  4. Univ. of California, Santa Barbara, CA (United States). Dept. of Electrical and Computer Engineering
  5. Univ. of California, Santa Barbara, CA (United States). Dept. of Materials; Univ. of California, Santa Barbara, CA (United States). Dept. of Chemistry and Biochemistry
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Quantum Materials for Energy Efficient Neuromorphic Computing (Q-MEEN-C); Univ. of California, Santa Barbara, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1594805
Grant/Contract Number:  
SC0012541; DMR-1720256; SC0019273; DBI-1625770
Resource Type:
Accepted Manuscript
Journal Name:
ACS Applied Materials and Interfaces
Additional Journal Information:
Journal Volume: 11; Journal Issue: 28; Journal ID: ISSN 1944-8244
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; halide perovskite; mixed halide; diffusion phase diagram; heterostructure; halide substitution; diffusion couple; Interfaces; Miscibility; Inorganic compounds; Heterostructures; Halogens

Citation Formats

Kennard, Rhys M., Dahlman, Clayton J., Nakayama, Hidenori, DeCrescent, Ryan A., Schuller, Jon A., Seshadri, Ram, Mukherjee, Kunal, and Chabinyc, Michael L. Phase Stability and Diffusion in Lateral Heterostructures of Methyl Ammonium Lead Halide Perovskites. United States: N. p., 2019. Web. doi:10.1021/acsami.9b06069.
Kennard, Rhys M., Dahlman, Clayton J., Nakayama, Hidenori, DeCrescent, Ryan A., Schuller, Jon A., Seshadri, Ram, Mukherjee, Kunal, & Chabinyc, Michael L. Phase Stability and Diffusion in Lateral Heterostructures of Methyl Ammonium Lead Halide Perovskites. United States. https://doi.org/10.1021/acsami.9b06069
Kennard, Rhys M., Dahlman, Clayton J., Nakayama, Hidenori, DeCrescent, Ryan A., Schuller, Jon A., Seshadri, Ram, Mukherjee, Kunal, and Chabinyc, Michael L. Wed . "Phase Stability and Diffusion in Lateral Heterostructures of Methyl Ammonium Lead Halide Perovskites". United States. https://doi.org/10.1021/acsami.9b06069. https://www.osti.gov/servlets/purl/1594805.
@article{osti_1594805,
title = {Phase Stability and Diffusion in Lateral Heterostructures of Methyl Ammonium Lead Halide Perovskites},
author = {Kennard, Rhys M. and Dahlman, Clayton J. and Nakayama, Hidenori and DeCrescent, Ryan A. and Schuller, Jon A. and Seshadri, Ram and Mukherjee, Kunal and Chabinyc, Michael L.},
abstractNote = {Mixed-halide hybrid organic inorganic perovskites have band gaps that span the visible spectrum making them candidates for optoelectronic devices. Diffusion of the halide atoms in methyl ammonium lead iodide (MAPbI3) and its alloys with bromine has been observed in both dark and under illumination. While halide transport upon application of electric fields has received much attention, less is known regarding bromide and iodide interdiffusion down concentration gradients. This work provides an upper bound on the bromide-iodide interdiffusion coefficient $D_i$, in thin films of (MAPbBrxI1-x)3 using a diffusion couple of a lateral heterostructure. The upper bound of $D_i$ was extracted from changes in the interface profiles of the heterostructures upon exposure to heat. The stability of thoroughly-heated interfacial profiles suggests that the miscibility gap extends to higher temperatures and to a higher fractional composition of bromine than predicted by theory. The results of this work provide guidance for compositions of thermally stable heterostructures of hybrid halide perovskites.},
doi = {10.1021/acsami.9b06069},
journal = {ACS Applied Materials and Interfaces},
number = 28,
volume = 11,
place = {United States},
year = {Wed Jul 03 00:00:00 EDT 2019},
month = {Wed Jul 03 00:00:00 EDT 2019}
}

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Cited by: 29 works
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Figure 1 Figure 1: Fabrication procedure for perovskite-perovskite heterostructures.

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