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Charge Reservoirs in an Expanded Halide Perovskite Analog: Enhancing High–Pressure Conductivity through Redox–Active Molecules

Journal Article · · Angewandte Chemie (International Edition)
 [1];  [2];  [2];  [3];  [2];  [4];  [5];  [6];  [2]
  1. Stanford Univ., CA (United States); University of Illinois Chicago
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., CA (United States)
  3. Stanford Univ., CA (United States)
  4. Univ. of Illinois, Chicago, IL (United States)
  5. Univ. of Twente, Enschede (The Netherlands)
  6. SLAC National Accelerator Lab., Menlo Park, CA (United States)
As halide perovskites and their derivatives are being developed for numerous optoelectronic applications, controlling their electronic doping remains a fundamental challenge. Herein, we describe a novel strategy of using redox-active organic molecules as stoichiometric electron acceptors. The cavities in the new expanded perovskite analogs (dmpz)[Sn2X6], (X=Br(1Br) and I (1I)) are occupied by dmpz2+ (N,N'-dimethylpyrazinium), with the LUMOs lying ca. 1 eV above the valence band maximum (VBM). Compressing the metal-halide framework drives up the VBM in 1I relative to the dmpz LUMO. The electronic conductivity increases by a factor of 105 with pressure, reaching 50(17) S cm–1 at 60 GPa, exceeding the high-pressure conductivities of most halide perovskites. This conductivity enhancement is attributed to an increased hole density created by dmpz2+ reduction. Lastly, this work elevates the role of organic cations in 3D metal-halides, from templating the structure to serving as charge reservoirs for tuning the carrier concentration.
Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Univ. of Illinois, Chicago, IL (United States)
Sponsoring Organization:
National Science Foundation; USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
AC02-05CH11231; AC02-76SF00515; NA0003975; SC0012704
OSTI ID:
1874374
Alternate ID(s):
OSTI ID: 1866277
OSTI ID: 1889848
Journal Information:
Angewandte Chemie (International Edition), Journal Name: Angewandte Chemie (International Edition) Journal Issue: 25 Vol. 61; ISSN 1433-7851
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

References (34)

Perovskites book March 2016
Enhanced Structural Stability and Photo Responsiveness of CH 3 NH 3 SnI 3 Perovskite via Pressure-Induced Amorphization and Recrystallization journal August 2016
Tuning the Thermoelectric Performance of Hybrid Tin Perovskites by Air Treatment journal November 2020
High Compression‐Induced Conductivity in a Layered Cu–Br Perovskite journal January 2020
Expanded Analogs of Three‐Dimensional Lead‐Halide Hybrid Perovskites journal August 2020
High Compression‐Induced Conductivity in a Layered Cu–Br Perovskite journal January 2020
Expanded Analogs of Three‐Dimensional Lead‐Halide Hybrid Perovskites journal August 2020
Transport, Optical, and Magnetic Properties of the Conducting Halide Perovskite CH3NH3SnI3 journal January 1995
Optical properties and electronic structure of amorphous Ge and Si journal January 1968
Hall mobility in tin iodide perovskite CH3NH3SnI3: Evidence for a doped semiconductor journal September 2013
The halogen chemistry of halide perovskites journal March 2022
Tuning the Luminescence of Layered Halide Perovskites journal January 2019
How SnF 2 Impacts the Material Properties of Lead-Free Tin Perovskites journal December 2017
High-Pressure Single-Crystal Structures of 3D Lead-Halide Hybrid Perovskites and Pressure Effects on their Electronic and Optical Properties journal April 2016
Halide Perovskites under Pressure: Accessing New Properties through Lattice Compression journal June 2017
Tunable Charge Transport in Soluble Organic–Inorganic Hybrid Semiconductors journal December 2007
Why is mercury liquid? Or, why do relativistic effects not get into chemistry textbooks? journal February 1991
Pressure-Induced Conductivity and Yellow-to-Black Piezochromism in a Layered Cu–Cl Hybrid Perovskite journal January 2015
Three-Dimensional Lead Iodide Perovskitoid Hybrids with High X-ray Photoresponse journal March 2020
A Three-Dimensional Lead Halide Perovskite-Related Ferroelectric journal February 2020
Three-Dimensional Lead Bromide Hybrid Ferroelectric Realized by Lattice Expansion journal November 2020
Pressure-Induced Metallization of the Halide Perovskite (CH 3 NH 3 )PbI 3 journal March 2017
Mirrors of Bonding in Metal Halide Perovskites journal September 2018
Hybrid organic—inorganic perovskites: low-cost semiconductors with intriguing charge-transport properties journal January 2016
Genesis, challenges and opportunities for colloidal lead halide perovskite nanocrystals journal February 2018
Metal halide perovskite tandem and multiple-junction photovoltaics journal November 2017
Electrical doping in halide perovskites journal March 2021
Charge-transport in tin-iodide perovskite CH3NH3SnI3: origin of high conductivity journal January 2011
Large resistivity reduction in mixed-valent CsAuBr 3 under pressure journal October 2019
Pressure-induced phase transitions and templating effect in three-dimensional organic-inorganic hybrid perovskites journal July 2003
Electronic band structure, phonons, and exciton binding energies of halide perovskites CsSnCl 3 , CsSnBr 3 , and CsSnI 3 journal October 2013
Defects in Semiconductors: Some Fatal, Some Vital journal August 1998
Gold Valence Transition and Phase Diagram in the Mixed-Valence Complexes, M 2 [Au I X 2 ][Au III X 4 ] (M = Rb, Cs; X = Cl, Br, and I) journal July 2000
Hole Doping of Tin Bromide and Lead Bromide Organic–Inorganic Hybrid Semiconductors journal October 2014