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Title: Steady-state microwave conductivity reveals mobility-lifetime product in methylammonium lead iodide

Abstract

Many time-resolved techniques to study charge carrier recombination involve pulsed high-power optical excitation and photo-generated carrier densities many orders of magnitude higher than present under typical solar cell operating conditions. In this report, we demonstrate a steady-state contactless microwave conductivity technique to evaluate the photoconductivity of carriers in semiconductors at low illumination intensity, as a function of optical power density. Specifically, we studied characteristics of both thin films and single crystals of a hybrid halide perovskite compound, methylammonium lead iodide (MAPbI3). The aggregate mobility-lifetime product of majority and minority carriers in thin films of MAPbI3 was determined and found to be highly-dependent on incident optical power density, even at sub-1-sun illumination intensities, and attributed to trap states within the films.

Authors:
ORCiD logo [1];  [1];  [1]; ORCiD logo [1]
  1. Univ. of California, Santa Barbara, CA (United States). Department of Materials and California NanoSystems Inst. (CNSI)
Publication Date:
Research Org.:
Univ. of California, Santa Barbara, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC); Defense Threat Reduction Agency (DTRA); Virgil Elings and Betty Elings Wells
OSTI Identifier:
1611840
Alternate Identifier(s):
OSTI ID: 1476848
Grant/Contract Number:  
SC0012541
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 113; Journal Issue: 15; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Physics; Semiconductors; Optical properties; Charge recombination; Charge dynamics; Perovskites; Electronic transport; Thin films; Chemical compounds; Photoconductivity

Citation Formats

Labram, John G., Perry, Erin E., Venkatesan, Naveen R., and Chabinyc, Michael L. Steady-state microwave conductivity reveals mobility-lifetime product in methylammonium lead iodide. United States: N. p., 2018. Web. doi:10.1063/1.5041959.
Labram, John G., Perry, Erin E., Venkatesan, Naveen R., & Chabinyc, Michael L. Steady-state microwave conductivity reveals mobility-lifetime product in methylammonium lead iodide. United States. doi:10.1063/1.5041959.
Labram, John G., Perry, Erin E., Venkatesan, Naveen R., and Chabinyc, Michael L. Tue . "Steady-state microwave conductivity reveals mobility-lifetime product in methylammonium lead iodide". United States. doi:10.1063/1.5041959. https://www.osti.gov/servlets/purl/1611840.
@article{osti_1611840,
title = {Steady-state microwave conductivity reveals mobility-lifetime product in methylammonium lead iodide},
author = {Labram, John G. and Perry, Erin E. and Venkatesan, Naveen R. and Chabinyc, Michael L.},
abstractNote = {Many time-resolved techniques to study charge carrier recombination involve pulsed high-power optical excitation and photo-generated carrier densities many orders of magnitude higher than present under typical solar cell operating conditions. In this report, we demonstrate a steady-state contactless microwave conductivity technique to evaluate the photoconductivity of carriers in semiconductors at low illumination intensity, as a function of optical power density. Specifically, we studied characteristics of both thin films and single crystals of a hybrid halide perovskite compound, methylammonium lead iodide (MAPbI3). The aggregate mobility-lifetime product of majority and minority carriers in thin films of MAPbI3 was determined and found to be highly-dependent on incident optical power density, even at sub-1-sun illumination intensities, and attributed to trap states within the films.},
doi = {10.1063/1.5041959},
journal = {Applied Physics Letters},
number = 15,
volume = 113,
place = {United States},
year = {2018},
month = {10}
}

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