Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
66 (1995), S. 2223-2225
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The features present in the capacitance– and conductance–voltage characteristics of [100]- and [111]-oriented InGaAs/GaAs multi-quantum well (MQW) p-i-n structures under illumination are described. Sequential tunneling of electrons and holes is proposed to explain the different peaks observed, as they occur at voltages corresponding to resonant alignment of energy levels of adjacent wells. Two kinds of piezoelectric [111] devices are analyzed, with positive or negative average electric fields in the MQW region. The voltage corresponding to zero average electric field in the MQW is detected by a feature in the dark device capacitance. For the sample with negative average electric field, the capacitance characteristics clearly reflect the presence and evolution with voltage of a long range screening of the piezoelectric fields by the photogenerated carriers. © 1995 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.113173
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