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

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.5041959· OSTI ID:1611840

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.

Research Organization:
Univ. of California, Santa Barbara, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); Defense Threat Reduction Agency (DTRA); Virgil Elings and Betty Elings Wells
Grant/Contract Number:
SC0012541
OSTI ID:
1611840
Alternate ID(s):
OSTI ID: 1476848
Journal Information:
Applied Physics Letters, Vol. 113, Issue 15; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 10 works
Citation information provided by
Web of Science

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