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
Journal	Advanced Materials
DOIs	https://doi.org/10.1002/adma.202416877
Publication status	Accepted/In press - 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.",

keywords = "colloidal quantum dots, focal plane array imagers, heterojunctions, thermal imaging",

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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year = "2025",

doi = "10.1002/adma.202416877",

language = "English",

journal = "Advanced Materials",

issn = "0935-9648",

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TY - JOUR

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

Y1 - 2025

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

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U2 - 10.1002/adma.202416877

DO - 10.1002/adma.202416877

M3 - Article

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SN - 0935-9648

JO - Advanced Materials

JF - Advanced Materials

ER -

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

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Keywords

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