Organic salt semiconductor with high photoconductivity and long carrier lifetime

Wang, Lei; Jenatsch, Sandra; Ruhstaller, Beat; Hinderling, Christian; Gesevičius, Donatas; Hany, Roland; Nüesch, Frank

doi:10.1002/adfm.201705724

Publication type:	Article in scientific journal
Type of review:	Peer review (publication)
Title:	Organic salt semiconductor with high photoconductivity and long carrier lifetime
Authors:	Wang, Lei Jenatsch, Sandra Ruhstaller, Beat Hinderling, Christian Gesevičius, Donatas Hany, Roland Nüesch, Frank
DOI:	10.1002/adfm.201705724
Published in:	Advanced Functional Materials
Volume(Issue):	28
Issue:	16
Page(s):	1705724
Issue Date:	2018
Publisher / Ed. Institution:	Wiley
ISSN:	1616-301X 1616-3028
Language:	English
Subject (DDC):	530: Physics
Abstract:	Intrinsic photogeneration of charge carriers in organic semiconductors is generally attributed to high energy ionization or exciton dissociation by a strong electric field. Here, high bulk photoconductivity is reported in pristine pentamethine cyanine films with photocurrent onset at the band‐edge of the organic semiconductor. Single‐layer cyanine diodes with selective hole and electron contacts show linear dependence of photocurrent with reverse voltage and light intensity. Numerical drift‐diffusion simulations reveal that the linear resistor behavior stems from low and unbalanced carrier mobilities giving rise to negative space charge. Slow bimolecular recombination kinetics of photoinduced charges obtained by time delayed charge extraction measurements show strongly reduced Langevin recombination with long carrier lifetime of the order of a millisecond. Such reduced charge carrier recombination puts forward a materials concept to be exploited in photodiodes and more generally in optoelectronic devices.
URI:	https://digitalcollection.zhaw.ch/handle/11475/16128
Fulltext version:	Published version
License (according to publishing contract):	Licence according to publishing contract
Departement:	School of Engineering
Organisational Unit:	Institute of Computational Physics (ICP)
Appears in collections:	Publikationen School of Engineering

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Wang, L., Jenatsch, S., Ruhstaller, B., Hinderling, C., Gesevičius, D., Hany, R., & Nüesch, F. (2018). Organic salt semiconductor with high photoconductivity and long carrier lifetime. Advanced Functional Materials, 28(16), 1705724. https://doi.org/10.1002/adfm.201705724

Wang, L. et al. (2018) ‘Organic salt semiconductor with high photoconductivity and long carrier lifetime’, Advanced Functional Materials, 28(16), p. 1705724. Available at: https://doi.org/10.1002/adfm.201705724.

L. Wang et al., “Organic salt semiconductor with high photoconductivity and long carrier lifetime,” Advanced Functional Materials, vol. 28, no. 16, p. 1705724, 2018, doi: 10.1002/adfm.201705724.

WANG, Lei, Sandra JENATSCH, Beat RUHSTALLER, Christian HINDERLING, Donatas GESEVIČIUS, Roland HANY und Frank NÜESCH, 2018. Organic salt semiconductor with high photoconductivity and long carrier lifetime. Advanced Functional Materials. 2018. Bd. 28, Nr. 16, S. 1705724. DOI 10.1002/adfm.201705724

Wang, Lei, Sandra Jenatsch, Beat Ruhstaller, Christian Hinderling, Donatas Gesevičius, Roland Hany, and Frank Nüesch. 2018. “Organic Salt Semiconductor with High Photoconductivity and Long Carrier Lifetime.” Advanced Functional Materials 28 (16): 1705724. https://doi.org/10.1002/adfm.201705724.

Wang, Lei, et al. “Organic Salt Semiconductor with High Photoconductivity and Long Carrier Lifetime.” Advanced Functional Materials, vol. 28, no. 16, 2018, p. 1705724, https://doi.org/10.1002/adfm.201705724.