Article (Scientific journals)
Intragrain charge transport in kesterite thin films-Limits arising from carrier localization
Hempel, Hannes; Redinger, Alex; Repins, Ingrid et al.
2016In JOURNAL OF APPLIED PHYSICS, 120 (17)
Peer reviewed
 

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Abstract :
[en] Intragrain charge carrier mobilities measured by time-resolved terahertz spectroscopy in state of the art Cu2ZnSn(S,Se)(4) kesterite thin films are found to increase from 32 to 140 cm(2) V-1 s(-1) with increasing Se content. The mobilities are limited by carrier localization on the nanometer-scale, which takes place within the first 2 ps after carrier excitation. The localization strength obtained from the Drude-Smith model is found to be independent of the excited photocarrier density. This is in accordance with bandgap fluctuations as a cause of the localized transport. Charge carrier localization is a general issue in the probed kesterite thin films, which were deposited by co-evaporation colloidal inks, and sputtering followed by annealing with varying Se/S contents and yield 4.9\%-10.0 efficiency in the completed device. (C) 2016 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Disciplines :
Physics
Author, co-author :
Hempel, Hannes
Redinger, Alex ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit
Repins, Ingrid
Moisan, Camille
Larramona, Gerardo
Dennler, Gilles
Handwerg, Martin
Fischer, Saskia F.
Eichberger, Rainer
Unold, Thomas
External co-authors :
yes
Language :
English
Title :
Intragrain charge transport in kesterite thin films-Limits arising from carrier localization
Publication date :
2016
Journal title :
JOURNAL OF APPLIED PHYSICS
Volume :
120
Issue :
17
Peer reviewed :
Peer reviewed
Focus Area :
Physics and Materials Science
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