Low dark current photovoltaic multiquantum well long wavelength infrared detectors
- Sato, R. N.
- Jul 1, 1990.
- Physical Description:
- 1 electronic document
- Additional Creators:
- Hu, M., Wu, C. S., and Wen, Cheng P.
- hdl.handle.net , Connect to this object online.
- Restrictions on Access:
- Unclassified, Unlimited, Publicly available.
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- The authors have, for the first time, demonstrated photovoltaic detection for an multiple quantum well (MQW) detector. With a blocking layer, the MQW detector exhibits Schottky I-V characteristics with extremely low dark current and excellent ideality factor. The dark current is 5 times 10(exp -14) A for an 100x100 square micron 10 micron detector at 40 K, 8 to 9 orders of magnitude lower than that of a similar 10 micron MQW detector without blocking layer. The ideality factor is about 1.01 to 1.05 at T = 40 to 80 K. The measured barrier height is consistent with the energy difference between first excited states and ground states, or the peak of spectral response. The authors also, for the first time, report the measured effective Richardson constant (A asterisk asterisk) for the GaAs/AlGaAs heterojunction using this blocking layer structure. The A asterisk asterisk is low approx. 2.3 A/sq cm/K(exp 2).
- Other Subject(s):
- NASA Technical Reports Server (NTRS) Collection.
- Document ID: 19910005083.
Accession ID: 91N14396.
JPL, California Inst. of Tech., Innovative Long Wavelength Infrared Detector Workshop Proceedings; p 263-274.
- No Copyright.
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