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Title: Pressure-induced phase transformation, reversible amorphization, and anomalous visible light response in organolead bromide perovskite

Journal Article · · Journal of the American Chemical Society
 [1];  [2];  [3];  [4];  [5];  [6];  [3];  [7];  [2]
  1. Univ. of Nevada, Las Vegas, NV (United States); Carnegie Inst. of Washington, Argonne, IL (United States); Huanghe Science and Technology College, Henan (China); UNLV
  2. Univ. of Nevada, Las Vegas, NV (United States)
  3. Carnegie Inst. of Washington, Argonne, IL (United States); Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai (China)
  4. Huanghe Science and Technology College, Henan (China)
  5. Carnegie Inst. of Washington, Argonne, IL (United States)
  6. Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai (China)
  7. Chinese Academy of Sciences (CAS), Beijing (China)

Hydrostatic pressure, as an alternative of chemical pressure to tune the crystal structure and physical properties, is a significant technique for novel function material design and fundamental research. In this article, we report the phase stability and visible light response of the organolead bromide perovskite, CH3NH3PbBr3 (MAPbBr3), under hydrostatic pressure up to 34 GPa at room temperature: Two phase transformations below 2 GPa (from Pm3¯m to Im3¯, then to Pnma) and a reversible amorphization starting from about 2 GPa were observed, which could be attributed to the tilting of PbBr6 octahedra and destroying of long-range ordering of MA cations, respectively. The visible light response of MAPbBr3 to pressure was studied by in situ photoluminescence, electric resistance, photocurrent measurements and first-principle simulations. The anomalous band gap evolution during compression with red-shift followed by blue-shift is explained by the competition between compression effect and pressure-induced amorphization. Along with the amorphization process accomplished around 25 GPa, the resistance increased by 5 orders of magnitude while the system still maintains its semiconductor characteristics and considerable response to the visible light irradiation. Lastly, our results not only show that hydrostatic pressure may provide an applicable tool for the organohalide perovskites based photovoltaic device functioning as switcher or controller, but also shed light on the exploration of more amorphous organometal composites as potential light absorber.

Research Organization:
Univ. of Nevada, Las Vegas, NV (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
NA0001982
OSTI ID:
1332921
Journal Information:
Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Journal Issue: 34 Vol. 137; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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High-Pressure Band-Gap Engineering in Lead-Free Cs 2 AgBiBr 6 Double Perovskite journal November 2017
Stable Blue Luminescent CsPbBr 3 Perovskite Nanocrystals Confined in Mesoporous Thin Films journal June 2018
Pressure-Induced Emission Enhancement, Band-Gap Narrowing, and Metallization of Halide Perovskite Cs 3 Bi 2 I 9 journal July 2018
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High-Pressure Band-Gap Engineering in Lead-Free Cs 2 AgBiBr 6 Double Perovskite journal November 2017
Stable Blue Luminescent CsPbBr 3 Perovskite Nanocrystals Confined in Mesoporous Thin Films journal June 2018
Pressure-Induced Emission Enhancement, Band-Gap Narrowing, and Metallization of Halide Perovskite Cs 3 Bi 2 I 9 journal July 2018
Enhanced Sensitivity and Piezochromic Contrast through Single-Direction Extension of Molecular Structure journal December 2016
Room Temperature Phase Transition in Methylammonium Lead Iodide Perovskite Thin Films Induced by Hydrohalic Acid Additives journal September 2016
Structural, Optical, and Thermal Properties of Cs 2 SnI 6 - x Br x Mixed Perovskite Solid Solutions: Structural, Optical, and Thermal Properties of Cs 2 SnI 6 - x Br x Mixed Perovskite Solid Solutions journal May 2019
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Strain induced electronic structure variation in methyl-ammonium lead iodide perovskite journal May 2018
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Drastic photoluminescence modulation of an organic molecular crystal with high pressure journal January 2019
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Advances in the application of high pressure in carbon dots journal January 2019
Metal halide perovskites under compression journal January 2019
Strategic modification of ligands for remarkable piezochromic luminescence (PCL) based on a neutral Ir( iii ) phosphor journal January 2019
Pressure-induced structural evolution, optical and electronic transitions of nontoxic organometal halide perovskite-based methylammonium tin chloride journal December 2017
Pressure dependence of excited-state charge-carrier dynamics in organolead tribromide perovskites journal May 2018
Characterization of colloidal nanocrystal surface structure using small angle neutron scattering and efficient Bayesian parameter estimation journal June 2019
Pressure responses of halide perovskites with various compositions, dimensionalities, and morphologies journal January 2020
Simultaneous band-gap narrowing and carrier-lifetime prolongation of organic–inorganic trihalide perovskites journal July 2016
Pressure-induced semiconductor-to-metal phase transition of a charge-ordered indium halide perovskite journal November 2019
Pressure-induced phase transformation of CsPbI 3 by X-ray diffraction and Raman spectroscopy journal June 2017
Pressure induced transformation and subsequent amorphization of monoclinic Nb 2 O 5 and its effect on optical properties journal January 2019
Pressure-induced emission of cesium lead halide perovskite nanocrystals. text January 2018
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