abstract

• Low-cost, light-weight, low-power, large-format, room-temperature, mid-wave infrared (MWIR) detectors are needed for reduced-scale aircraft. An opportunity, suggested by direct-read X-radiography systems, is the use of thin film transistor (TFT) array as read-out integrated circuit (ROIC) for low-cost sensors deposited directly and unpatterned onto this ROIC. TFTs have already been thoroughly optimized for power, weight, large-format, and cost by the flat-panel-display industry. We present experimental investigation of aqueous-spray-deposited, mid-wave-IR, metal-chalcogenide heterojunction CdS/PbS photodiodes for this application. Measured responsivity, detectivity D∗, and photoresponse spectra are reported. Copyright © Materials Research Society 2020.

authors

• Boroumand J.
• Boykin T.
• Dhakal N.
• Figueiredo P.
• González Contreras Francisco Javier
• Neushul S.
• Oladeji I.O.
• Peale R.E.

publication date

• 2020-01-01

published in

• MRS Advances  Journal

keywords

• Cadmium sulfide; Chalcogenides; Deposits; Flat panel displays; Heterojunctions; II-VI semiconductors; Infrared radiation; Photodiodes; Scales (weighing instruments); Thin film circuits; Thin film transistors; Experimental investigations; Infrared imagers; Low-cost sensors; Metal chalcogenide; Mid wave infrared (MWIR); Photoresponses; Readout integrated circuits; Spray-deposited; Costs

Digital Object Identifier (DOI)

• 10.1557/adv.2020.324

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