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Hailin Peng's research group and collaborators in the School of Chemistry and Molecular Engineering reported on the infrared detection of a new two-dimensional semiconductor Bi2O2Se heterojunction

 Last Update: 2022-09-21
 Source: Internet
 Author: User

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As the "clairvoyance" for people to observe nature, infrared light detectors play an important role

In the past five years, Professor Peng Hailin's research group and collaborators in the School of Chemistry and Molecular Engineering of Peking University have discovered for the first time a new class of two-dimensional semiconductor chip materials (bismuth selenium oxide, Bi_2O2_Se)with ultra-high electron mobility, suitable band gap, environmental stability and batch preparation characteristics, and developed two-dimensional_Bi2O2 Se high-performance electronic and optoelectronic devices such as high-speed and low-power electronic devices, quantum transport devices, ultra-fast high-sensitivity infrared light detection (Nature Nanotech.

Recently, Peng Hailin's research group and the Shanghai Institute of Technology of the Chinese Academy of Sciences Hu Weida and Miao Jinshui team cooperated to propose that the van Der Waal heterojunction of momentum matching and energy band matching (momentum matching) should be applied to infrared detection

The research results were published in Science Advances 2022, 8, eabq1781, under the title "Momentum-matching and band-alignment van der Waals heterostructures for high-efficiency infrared photodetection"

2D semiconductor Bi_2O2Se/BP van Der Waals heterojunction infrared photodetector with quantum efficiency and polarization characteristics

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