Electrically-driven single-photon sources based on colloidal quantum dots with near-optimal antibunching at room temperature

Nature Communications
Xing LinXiaogang Peng

Abstract

Photonic quantum information requires high-purity, easily accessible, and scalable single-photon sources. Here, we report an electrically driven single-photon source based on colloidal quantum dots. Our solution-processed devices consist of isolated CdSe/CdS core/shell quantum dots sparsely buried in an insulating layer that is sandwiched between electron-transport and hole-transport layers. The devices generate single photons with near-optimal antibunching at room temperature, i.e., with a second-order temporal correlation function at zero delay (g (2)(0)) being <0.05 for the best devices without any spectral filtering or background correction. The optimal g (2)(0) from single-dot electroluminescence breaks the lower g (2)(0) limit of the corresponding single-dot photoluminescence. Such highly suppressed multi-photon-emission probability is attributed to both novel device design and carrier injection/recombination dynamics. The device structure prevents background electroluminescence while offering efficient single-dot electroluminescence. A quantitative model is developed to illustrate the carrier injection/recombination dynamics of single-dot electroluminescence.

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Citations

Apr 1, 2020·Applied Optics·Xintong HouXiaoming Xie
May 10, 2020·Nature Communications·Yunzhou DengYizheng Jin
Apr 17, 2019·Nature Communications·Xiaoqi HouXiaogang Peng
Jan 31, 2021·The Review of Scientific Instruments·Shaojie LiuChaoyuan Jin
Dec 30, 2020·Chemical Reviews·Cherie R KaganSarah M Thompson
Jul 27, 2021·ACS Nano·Surendra B AnantharamanDeep Jariwala
Aug 7, 2021·Science·F Pelayo García de ArquerEdward H Sargent
Jun 30, 2018·Journal of the American Chemical Society·Runchen LaiXiaogang Peng
Jul 30, 2020·ACS Central Science·Zhiyuan CaoXiaogang Peng
Apr 10, 2019·Journal of the American Chemical Society·Yang LiXiaogang Peng
Oct 28, 2021·Journal of the American Chemical Society·Zhuang HuXiaogang Peng

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