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Proceedings Paper

PbS and HgTe quantum dots for SW IR devices
Author(s): W. Palosz; S. Trivedi; G. Meissner; K. Olver; E. DeCuir Jr.; P. S. Wijewarnasuriya; J. L. Jensen
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Paper Abstract

HgTe and PbS colloidal quantum dots (CQD) with first excitonic absorption peak of about 2 μm and shorter (down to about 1 μm) have been synthesized and characterized. The synthesized CQDs were characterized using FTIR spectroscopy and TEM technique. The nanomaterials were tested for photo-electrical properties with photoconductive (PC) devices. The devices were fabricated by drop-casting a suspension of the CQDs on the fanout, followed by solid state ligand exchange (SSLE) process, and then spectral and electrical photoresponse of the device were measured. The SSLE process was evaluated thru absorption spectra of test samples. The device fabrication parameters were the number of deposited layers, the thickness of individual layers, the type of the substituting ligand, and the ligand exchange duration. For selected devices external quantum efficiency (EQE) was also determined.

Paper Details

Date Published: 19 September 2017
PDF: 9 pages
Proc. SPIE 10404, Infrared Sensors, Devices, and Applications VII, 104040M (19 September 2017); doi: 10.1117/12.2275677
Show Author Affiliations
W. Palosz, Brimrose Corp. of America (United States)
S. Trivedi, Brimrose Corp. of America (United States)
G. Meissner, U.S. Army Research Lab. (United States)
K. Olver, U.S. Army Research Lab. (United States)
E. DeCuir Jr., U.S. Army Research Lab. (United States)
P. S. Wijewarnasuriya, U.S. Army Research Lab. (United States)
J. L. Jensen, U.S. Army Edgewood Chemical Biological Ctr. (United States)

Published in SPIE Proceedings Vol. 10404:
Infrared Sensors, Devices, and Applications VII
Paul D. LeVan; Ashok K. Sood; Priyalal Wijewarnasuriya; Arvind I. D'Souza, Editor(s)

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