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Crystals 2017, 7(5), 149; doi:10.3390/cryst7050149

Material and Device Architecture Engineering Toward High Performance Two-Dimensional (2D) Photodetectors

1
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2,3
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4,* and 1,2,3,*
1
Department of Physics, School of Science, Beijing Jiaotong University, No. 3 Shang Yuan Cun, Hai Dian District, Beijing 100044, China
2
Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, Tianjin University, Tianjin 300072, China
3
Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
4
Key Laboratory of Luminescence and Optical Information, Ministry of Education, School of Science, Beijing Jiaotong University, Beijing 100044, China
*
Authors to whom correspondence should be addressed.
Academic Editors: Cristina E. Giusca and Spyros Yannopoulos
Received: 1 April 2017 / Revised: 4 May 2017 / Accepted: 10 May 2017 / Published: 22 May 2017
View Full-Text   |   Download PDF [5701 KB, uploaded 22 May 2017]   |  

Abstract

Photodetectors based on two-dimensional (2D) nanostructures have led to a high optical response, and a long photocarrier lifetime because of spatial confinement effects. Since the discovery of graphene, many different 2D semiconductors have been developed and utilized in the ultrafast and ultrasensitive detection of light in the ultraviolet, visible, infrared and terahertz frequency ranges. This review presents a comprehensive summary of recent breakthroughs in constructing high-performance photodetectors based on 2D materials. First, we give a general overview of 2D photodetectors based on various single-component materials and their operating wavelength (ultraviolet to terahertz regime). Then, we summarize the design and controllable synthesis of heterostructure material systems to promote device photoresponse. Subsequently, special emphasis is put on the accepted methods in rational engineering of device architectures toward the photoresponse improvements. Finally, we conclude with our personal viewpoints on the challenges and promising future directions in this research field. View Full-Text
Keywords: two-dimensional (2D) photodetectors; graphene; heterojunctions; device architecture two-dimensional (2D) photodetectors; graphene; heterojunctions; device architecture
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Cui, Q.; Yang, Y.; Li, J.; Teng, F.; Wang, X. Material and Device Architecture Engineering Toward High Performance Two-Dimensional (2D) Photodetectors. Crystals 2017, 7, 149.

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