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@ARTICLE{Laird:909558,
author = {Laird, Jamie S. and Ravishankar, Sandheep and Rietwyk,
Kevin J. and Mao, Wenxin and Bach, Udo and Smith, Trevor A.},
title = {{I}ntensity {M}odulated {P}hotocurrent {M}icrospectrosopy
for {N}ext {G}eneration {P}hotovoltaics},
journal = {Small methods},
volume = {6},
number = {9},
issn = {2366-9608},
address = {Weinheim},
publisher = {WILEY-VCH Verlag GmbH $\&$ Co. KGaA},
reportid = {FZJ-2022-03247},
pages = {2200493},
year = {2022},
abstract = {In this report, a large-area laser beam induced current
microscope that has been adapted to perform intensity
modulated photocurrent spectroscopy (IMPS) in an imaging
mode is described. Microscopy-based IMPS method provides a
spatial resolution of the frequency domain response of the
solar cell, allowing correlation of the optoelectronic
response with a particular interface, bulk material,
specific transport layer, or transport parameter. The system
is applied to study degradation effects in back-contact
perovskite cells where it is found to readily differentiate
areas based on their markedly different frequency response.
Using the diffusion-recombination model, the IMPS response
is modeled for a sandwich structure and extended for the
special case of lateral diffusion in a back-contact cell. In
the low-frequency limit, the model is used to calculate
spatial maps of the carrier ambipolar diffusion length. The
observed frequency response of IMPS images is then
discussed.},
cin = {IEK-5},
ddc = {620},
cid = {I:(DE-Juel1)IEK-5-20101013},
pnm = {1215 - Simulations, Theory, Optics, and Analytics (STOA)
(POF4-121)},
pid = {G:(DE-HGF)POF4-1215},
typ = {PUB:(DE-HGF)16},
pubmed = {35973943},
UT = {WOS:000840898300001},
doi = {10.1002/smtd.202200493},
url = {https://juser.fz-juelich.de/record/909558},
}