PbS and HgTe quantum dots for SW IR devices

W. Palosz; S. Trivedi; G. Meissner; K. Olver; E. DeCuir Jr.; P. S. Wijewarnasuriya; J. L. Jensen

doi:10.1117/12.2275677

19 September 2017 PbS and HgTe quantum dots for SW IR devices

W. Palosz, S. Trivedi, G. Meissner, K. Olver, E. DeCuir Jr., P. S. Wijewarnasuriya, J. L. Jensen

Proceedings Volume 10404, Infrared Sensors, Devices, and Applications VII; 104040M (2017) https://doi.org/10.1117/12.2275677
Event: SPIE Optical Engineering + Applications, 2017, San Diego, California, United States

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.

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Citation Download Citation

W. Palosz, S. Trivedi, G. Meissner, K. Olver, E. DeCuir Jr., P. S. Wijewarnasuriya, and J. L. Jensen "PbS and HgTe quantum dots for SW IR devices", Proc. SPIE 10404, Infrared Sensors, Devices, and Applications VII, 104040M (19 September 2017); https://doi.org/10.1117/12.2275677

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