Ultrasensitive Colloidal Quantum-Dot Upconverters for Extended Short-Wave Infrared

Ge Mu; Tianyu Rao; Shuo Zhang; Chong Wen; Menglu Chen; Qun Hao; Xin Tang

doi:10.1021/acsami.2c12002

Ultrasensitive Colloidal Quantum-Dot Upconverters for Extended Short-Wave Infrared

Ge Mu, Tianyu Rao, Shuo Zhang, Chong Wen, Menglu Chen^*, Qun Hao^*, Xin Tang^*

^*Corresponding author for this work

School of Optics and Photonics

Beijing Institute of Technology

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

23 Citations (Scopus)

Abstract

Infrared-to-visible upconverters converting low-energy infrared to higher-energy visible light without bringing in complicated readout integrated circuits have triggered enormous excitement. However, existing upconverters suffer from limited sensing wavelengths, low photon-to-photon (p-p) efficiency, and high minimum detectable infrared power. Here, we reported the colloidal quantum-dot (CQD) upconverters with unprecedented performance. By using HgTe CQDs as the sensing layer, the operation spectral ranges of the upconverters are, for the first time, extended to short-wave infrared. More importantly, the resistance-area products of the HgTe CQD photodetectors are carefully optimized by interface engineering to match with the visible light-emitting diodes so that the quantum efficiency and sensitivity of upconverters can be maximized.

Original language	English
Pages (from-to)	45553-45561
Number of pages	9
Journal	ACS applied materials & interfaces
Volume	14
Issue number	40
DOIs	https://doi.org/10.1021/acsami.2c12002
Publication status	Published - 12 Oct 2022

Keywords

colloidal quantum dots
infrared-to-visible upconverters
photon-to-photon efficiency
sensitivity
short-wave infrared

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10.1021/acsami.2c12002

Cite this

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abstract = "Infrared-to-visible upconverters converting low-energy infrared to higher-energy visible light without bringing in complicated readout integrated circuits have triggered enormous excitement. However, existing upconverters suffer from limited sensing wavelengths, low photon-to-photon (p-p) efficiency, and high minimum detectable infrared power. Here, we reported the colloidal quantum-dot (CQD) upconverters with unprecedented performance. By using HgTe CQDs as the sensing layer, the operation spectral ranges of the upconverters are, for the first time, extended to short-wave infrared. More importantly, the resistance-area products of the HgTe CQD photodetectors are carefully optimized by interface engineering to match with the visible light-emitting diodes so that the quantum efficiency and sensitivity of upconverters can be maximized.",

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AU - Mu, Ge

AU - Rao, Tianyu

AU - Zhang, Shuo

AU - Wen, Chong

AU - Chen, Menglu

AU - Hao, Qun

AU - Tang, Xin

PY - 2022/10/12

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N2 - Infrared-to-visible upconverters converting low-energy infrared to higher-energy visible light without bringing in complicated readout integrated circuits have triggered enormous excitement. However, existing upconverters suffer from limited sensing wavelengths, low photon-to-photon (p-p) efficiency, and high minimum detectable infrared power. Here, we reported the colloidal quantum-dot (CQD) upconverters with unprecedented performance. By using HgTe CQDs as the sensing layer, the operation spectral ranges of the upconverters are, for the first time, extended to short-wave infrared. More importantly, the resistance-area products of the HgTe CQD photodetectors are carefully optimized by interface engineering to match with the visible light-emitting diodes so that the quantum efficiency and sensitivity of upconverters can be maximized.

AB - Infrared-to-visible upconverters converting low-energy infrared to higher-energy visible light without bringing in complicated readout integrated circuits have triggered enormous excitement. However, existing upconverters suffer from limited sensing wavelengths, low photon-to-photon (p-p) efficiency, and high minimum detectable infrared power. Here, we reported the colloidal quantum-dot (CQD) upconverters with unprecedented performance. By using HgTe CQDs as the sensing layer, the operation spectral ranges of the upconverters are, for the first time, extended to short-wave infrared. More importantly, the resistance-area products of the HgTe CQD photodetectors are carefully optimized by interface engineering to match with the visible light-emitting diodes so that the quantum efficiency and sensitivity of upconverters can be maximized.

KW - colloidal quantum dots

KW - infrared-to-visible upconverters

KW - photon-to-photon efficiency

KW - sensitivity

KW - short-wave infrared

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Ultrasensitive Colloidal Quantum-Dot Upconverters for Extended Short-Wave Infrared

Abstract

Keywords

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