Colloidal Quantum-Dot Heterojunction Imagers for Room-Temperature Thermal Imaging

Ge Mu; Xiaolong Zheng; Yimei Tan; Yanfei Liu; Qun Hao; Kangkang Weng; Xin Tang

doi:10.1002/adma.202416877

Colloidal Quantum-Dot Heterojunction Imagers for Room-Temperature Thermal Imaging

Ge Mu, Xiaolong Zheng, Yimei Tan, Yanfei Liu, Qun Hao, Kangkang Weng^*, Xin Tang^*

^*Corresponding author for this work

School of Optics and Photonics

Research output: Contribution to journal › Article › peer-review

Abstract

Room-temperature operation or high-operation temperature (HOT) is essential for mid-wave infrared (MWIR) optoelectronics devices providing low-cost and compact systems for numerous applications. Colloidal quantum dots (CQDs) have emerged as a rising candidate to enable photodetectors to operate at HOT or room temperature and develop the next-generation infrared focal plane array (FPA) imagers. Here, band-engineered heterojunctions are demonstrated to suppress dark current with well-passivated mercury telluride (HgTe) CQDs enabling room-temperature MWIR imaging by single-pixel scanning and 640 × 512 FPA sensitive thermal imaging above 250 K. As a result, the room-temperature detectivity reaches as high as 1.26 × 10¹⁰ Jones, and the noise equivalent temperature difference (NETD) is as good as 25 mK up to 200 K.

Original language	English
Article number	2416877
Journal	Advanced Materials
Volume	37
Issue number	10
DOIs	http://doi.org/10.1002/adma.202416877
Publication status	Published - 12 Mar 2025

Keywords

colloidal quantum dots
focal plane array imagers
heterojunctions
thermal imaging

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10.1002/adma.202416877

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title = "Colloidal Quantum-Dot Heterojunction Imagers for Room-Temperature Thermal Imaging",

abstract = "Room-temperature operation or high-operation temperature (HOT) is essential for mid-wave infrared (MWIR) optoelectronics devices providing low-cost and compact systems for numerous applications. Colloidal quantum dots (CQDs) have emerged as a rising candidate to enable photodetectors to operate at HOT or room temperature and develop the next-generation infrared focal plane array (FPA) imagers. Here, band-engineered heterojunctions are demonstrated to suppress dark current with well-passivated mercury telluride (HgTe) CQDs enabling room-temperature MWIR imaging by single-pixel scanning and 640 × 512 FPA sensitive thermal imaging above 250 K. As a result, the room-temperature detectivity reaches as high as 1.26 × 1010 Jones, and the noise equivalent temperature difference (NETD) is as good as 25 mK up to 200 K.",

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author = "Ge Mu and Xiaolong Zheng and Yimei Tan and Yanfei Liu and Qun Hao and Kangkang Weng and Xin Tang",

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T1 - Colloidal Quantum-Dot Heterojunction Imagers for Room-Temperature Thermal Imaging

AU - Mu, Ge

AU - Zheng, Xiaolong

AU - Tan, Yimei

AU - Liu, Yanfei

AU - Hao, Qun

AU - Weng, Kangkang

AU - Tang, Xin

PY - 2025/3/12

Y1 - 2025/3/12

N2 - Room-temperature operation or high-operation temperature (HOT) is essential for mid-wave infrared (MWIR) optoelectronics devices providing low-cost and compact systems for numerous applications. Colloidal quantum dots (CQDs) have emerged as a rising candidate to enable photodetectors to operate at HOT or room temperature and develop the next-generation infrared focal plane array (FPA) imagers. Here, band-engineered heterojunctions are demonstrated to suppress dark current with well-passivated mercury telluride (HgTe) CQDs enabling room-temperature MWIR imaging by single-pixel scanning and 640 × 512 FPA sensitive thermal imaging above 250 K. As a result, the room-temperature detectivity reaches as high as 1.26 × 1010 Jones, and the noise equivalent temperature difference (NETD) is as good as 25 mK up to 200 K.

AB - Room-temperature operation or high-operation temperature (HOT) is essential for mid-wave infrared (MWIR) optoelectronics devices providing low-cost and compact systems for numerous applications. Colloidal quantum dots (CQDs) have emerged as a rising candidate to enable photodetectors to operate at HOT or room temperature and develop the next-generation infrared focal plane array (FPA) imagers. Here, band-engineered heterojunctions are demonstrated to suppress dark current with well-passivated mercury telluride (HgTe) CQDs enabling room-temperature MWIR imaging by single-pixel scanning and 640 × 512 FPA sensitive thermal imaging above 250 K. As a result, the room-temperature detectivity reaches as high as 1.26 × 1010 Jones, and the noise equivalent temperature difference (NETD) is as good as 25 mK up to 200 K.

KW - colloidal quantum dots

KW - focal plane array imagers

KW - heterojunctions

KW - thermal imaging

UR - http://www.scopus.com/pages/publications/86000437438

U2 - 10.1002/adma.202416877

DO - 10.1002/adma.202416877

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VL - 37

JO - Advanced Materials

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Colloidal Quantum-Dot Heterojunction Imagers for Room-Temperature Thermal Imaging

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Keywords

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