Mercury Telluride Quantum Dot Based Phototransistor Enabling High-Sensitivity Room-Temperature Photodetection at 2000 nm

ACS Nano
Mengyu ChenNi Zhao

Abstract

Near-to-mid-infrared photodetection technologies could be widely deployed to advance the infrastructures of surveillance, environmental monitoring, and manufacturing, if the detection devices are low-cost, in compact format, and with high performance. For such application requirements, colloidal quantum dot (QD) based photodetectors stand out as particularly promising due to the solution processability and ease of integration with silicon technologies; unfortunately, the detectivity of the QD photodetectors toward longer wavelengths has so far been low. Here we overcome this performance bottleneck through synergistic efforts between synthetic chemistry and device engineering. First, we developed a fully automated aprotic solvent, gas-injection synthesis method that allows scalable fabrication of large sized HgTe QDs with high quality, exhibiting a record high photoluminescence quantum yield of 17% at the photoluminescence peak close to 2.1 μm. Second, through gating a phototransistor structure we demonstrate room-temperature device response to reach >2 × 1010 cm Hz1/2 W-1 (at 2 kHz modulation frequency) specific detectivity beyond the 2 μm wavelength range, which is comparable to commercial epitaxial-grown photodetectors. To de...Continue Reading

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Citations

Aug 24, 2019·Nanoscale Research Letters·Yue YangJianquan Yao
Dec 14, 2018·Frontiers in Chemistry·Clément LivacheEmmanuel Lhuillier
Mar 2, 2021·Chemical Reviews·Charlie GrébovalEmmanuel Lhuillier
Mar 23, 2021·Advanced Science·Matthias J GroteventIvan Shorubalko
May 7, 2021·Nano Letters·Sang-Soo CheeEmmanuel Lhuillier
Jun 5, 2018·The Journal of Physical Chemistry Letters·Ting ShenJianjun Tian
Jan 29, 2019·ACS Applied Materials & Interfaces·Dongsun ChoiKwang Seob Jeong
Apr 5, 2018·Journal of the American Chemical Society·Nicolas GoubetEmmanuel Lhuillier
Apr 1, 2020·ACS Nano·Ulrich Nguétchuissi NoumbéJean-Francois Dayen
Mar 27, 2018·ACS Applied Materials & Interfaces·Clément LivacheEmmanuel Lhuillier
Sep 29, 2017·ACS Applied Materials & Interfaces·Bertille MartinezEmmanuel Lhuillier
Jul 6, 2018·ACS Nano·Matthew M AckermanPhilippe Guyot-Sionnest
May 4, 2018·ACS Applied Materials & Interfaces·Matthew E CryerJonathan E Halpert
Aug 21, 2019·ACS Applied Materials & Interfaces·Audrey ChuEmmanuel Lhuillier
Jul 2, 2019·The Journal of Physical Chemistry Letters·Xuelin FanAlexander Eychmüller
Aug 28, 2021·Chemical Reviews·Matthew M D RoyEric Rivard

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