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More Insight into the Transient Photocurrent Response of Three-Color Detectors

Published online by Cambridge University Press:  15 February 2011

H. Stiebig ,
B. Stannowski ,
D. Knipp  and
H. Wagner
H. Stiebig
Affiliation:
Forschungszentrum Juelich, D-52425 Juelich, Germany, h.stiebig@fz-juelich.de
B. Stannowski
Affiliation:
Debye Inst., Interface Physics, Univ. Utrecht, POBox 80000, 3508TA Utrecht, Netherlands
D. Knipp
Affiliation:
Forschungszentrum Juelich, D-52425 Juelich, Germany
H. Wagner
Affiliation:
Forschungszentrum Juelich, D-52425 Juelich, Germany
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Abstract

Nipiin structures with controlled bandgap and mobility-life-time product exhibit excellent stationary properties. However, the photocurrent transients of these devices show reasonable delay times in the range of tens of milliseconds before reaching steady state. Hence, the transient behavior after light switching of three color detectors based on a nipiin structure was studied by a detailed analysis of experimentally determined and simulated data. The numerical simulation reproduces well the characteristic features. The delayed current onset and the sign reversal of the transient photocurrent response are explained by trapping of holes in the vicinity of the central p-layer.

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