Momentum-matching and band-alignment van der Waals heterostructures for high-efficiency infrared photodetection

被引：71

作者：

Chen, Yunfeng ^{[1
,2
]}

Tan, Congwei ^{[3
]}

Wang, Zhen ^{[1
]}

Miao, Jinshui ^{[1
,2
]}

Ge, Xun ^{[1
,2
]}

Zhao, Tiange ^{[1
]}

Liao, Kecai ^{[1
,2
]}

Ge, Haonan ^{[1
]}

Wang, Yang ^{[1
]}

Wang, Fang ^{[1
]}

Zhou, Yi ^{[1
]}

Wang, Peng ^{[1
]}

Zhou, Xiaohao ^{[1
]}

Shan, Chongxin ^{[4
]}

Peng, Hailin ^{[3
]}

Hu, Weida ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Tech Phys, State Key Lab Infrared Phys, Shanghai 200083, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Peking Univ, Coll Chem & Mol Engn, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China

[4] Zhengzhou Univ, Sch Phys & Engn, Henan Key Lab Diamond Optoelect Mat & Devices, Zhengzhou 450001, Peoples R China

来源：

SCIENCE ADVANCES | 2022年 / 8卷 / 30期

基金：

中国国家自然科学基金;

关键词：

QUANTUM EFFICIENCY; HIGH DETECTIVITY; SILICON; INTEGRATION;

D O I：

10.1126/sciadv.abq1781

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Two-dimensional (2D) infrared photodetectors always suffer from low quantum efficiency (QE) because of the limited atomically thin absorption. Here, we reported 2D black phosphorus (BP)/Bi2O2Se van der Waals (vdW) photodetectors with momentum-matching and band-alignment heterostructures to achieve high QE. The QE was largely improved by optimizing the generation, suppressing the recombination, and improving the collection of photocarriers. Note that momentum-matching BP/Bi2O2Se heterostructures in k-space lead to the highly efficient generation and transition of photocarriers. The recombination process can be largely suppressed by lattice mismatching-immune vdW interfaces. Furthermore, type II BP/Bi2O2Se vdW heterostructures could also assist fast transport and collection of photocarriers. By constructing momentum-matching and band-alignment heterostructures, a record-high QE of 84% at 1.3 micrometers and 76.5% at 2 micrometers have been achieved in BP/Bi2O2Se vdW photodetectors.

引用

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