Intraband quantum dot barrier devices - Optimization of energy level alignment

Shihab Bin Hafiz, Mohammad Mostafa Al Mahfuz, Dong Kyun Ko

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Mid-infrared barrier detectors constructed from intraband colloidal quantum dots brings the advantage of greatly simplified device fabrication procedure with the potential for high temperature operation. Here, we report the fabrication and characterization of vertically-stacked Ag2Se / PbS / Ag2Se quantum dot barrier devices with improved infrared responsivity. Through optimizing the energy level alignment, 4.5 μm responsivity now reaches 84.1 mA/W which results in 570 % improvement in specific detectivity compared to the first generation quantum dot barrier devices.

Original languageEnglish (US)
Title of host publication239th ECS Meeting with the 18th International Meeting on Chemical Sensors, IMCS 2021 - Quantum Dot Science and Technology
EditorsD. K. Ko, D. Mariotti, V. Svrcek, S. J. Oh
PublisherIOP Publishing Ltd.
Pages45-51
Number of pages7
Edition1
ISBN (Electronic)9781607685395
DOIs
StatePublished - 2021
Event239th ECS Meeting with the 18th International Meeting on Chemical Sensors, IMCS 2021 - Chicago, United States
Duration: May 30 2021Jun 3 2021

Publication series

NameECS Transactions
Number1
Volume102
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862

Conference

Conference239th ECS Meeting with the 18th International Meeting on Chemical Sensors, IMCS 2021
Country/TerritoryUnited States
CityChicago
Period5/30/216/3/21

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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