TY - JOUR
T1 - Van der Waals Epitaxial Growth of Mosaic-Like 2D Platinum Ditelluride Layers for Room-Temperature Mid-Infrared Photodetection up to 10.6 µm
AU - Zeng, Longhui
AU - Wu, Di
AU - Jie, Jiansheng
AU - Ren, Xiaoyan
AU - Hu, Xin
AU - Lau, Shu Ping
AU - Chai, Yang
AU - Tsang, Yuen Hong
N1 - Funding Information:
This work was financially supported by the Research Grants Council of Hong Kong, China (Project No. GRF 152093/18E, PolyU B-Q65N), the Hong Kong Polytechnic University grant (1-ZVGH), National Natural Science Foundation of China (Nos. 11804306, 51821002, 91833303, and 51672180), Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).
Funding Information:
This work was financially supported by the Research Grants Council of Hong Kong, China (Project No. GRF 152093/18E, PolyU B‐Q65N), the Hong Kong Polytechnic University grant (1‐ZVGH), National Natural Science Foundation of China (Nos. 11804306, 51821002, 91833303, and 51672180), Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO‐CIC), and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).
Publisher Copyright:
© 2020 Wiley-VCH GmbH
PY - 2020/12/28
Y1 - 2020/12/28
N2 - Mid-infrared (MIR) photodetection, covering diverse molecular vibrational regions and atmospheric transmission windows, is vital to civil and military purposes. Versatile use of MIR photodetectors is commonly dominated by HgCdTe alloys, InSb, and quantum superlattices, which are limited by strict operation demands, high-cost, and environmental toxicity. Despite the rapid advances of black phosphorus (BP)-based MIR photodetectors, these are subject to poor stability and large-area integration difficulty. Here, the van der Waals (vdW) epitaxial growth of a wafer-scale 2D platinum ditelluride (PtTe2) layer is reported via a simple tellurium-vapor transformation approach. The 2D PtTe2 layer possesses a unique mosaic-like crystal structure consisting of single-crystal domains with highly preferential [001] orientation along the normal direction, reducing the influence of interface defects and ensuring efficient out-of-plane carrier transportation. This characteristic, combined with the wide absorption of PtTe2 and well-designed vertical device architecture, makes the PtTe2/Si Schottky junction photodetector capable of sensing ultra-broadband light of up to 10.6 µm with a high specific detectivity. Also, the photodetector exhibits an excellent room-temperature infrared-imaging capability. This approach provides a new design concept for high-performance, room-temperature MIR photodetection based on 2D layered materials.
AB - Mid-infrared (MIR) photodetection, covering diverse molecular vibrational regions and atmospheric transmission windows, is vital to civil and military purposes. Versatile use of MIR photodetectors is commonly dominated by HgCdTe alloys, InSb, and quantum superlattices, which are limited by strict operation demands, high-cost, and environmental toxicity. Despite the rapid advances of black phosphorus (BP)-based MIR photodetectors, these are subject to poor stability and large-area integration difficulty. Here, the van der Waals (vdW) epitaxial growth of a wafer-scale 2D platinum ditelluride (PtTe2) layer is reported via a simple tellurium-vapor transformation approach. The 2D PtTe2 layer possesses a unique mosaic-like crystal structure consisting of single-crystal domains with highly preferential [001] orientation along the normal direction, reducing the influence of interface defects and ensuring efficient out-of-plane carrier transportation. This characteristic, combined with the wide absorption of PtTe2 and well-designed vertical device architecture, makes the PtTe2/Si Schottky junction photodetector capable of sensing ultra-broadband light of up to 10.6 µm with a high specific detectivity. Also, the photodetector exhibits an excellent room-temperature infrared-imaging capability. This approach provides a new design concept for high-performance, room-temperature MIR photodetection based on 2D layered materials.
KW - 2D platinum ditelluride
KW - mid-infrared photodetection
KW - mosaic-like structures
KW - photodetectors
UR - http://www.scopus.com/inward/record.url?scp=85096809662&partnerID=8YFLogxK
U2 - 10.1002/adma.202004412
DO - 10.1002/adma.202004412
M3 - Journal article
C2 - 33169465
AN - SCOPUS:85096809662
VL - 32
JO - Advanced Materials
JF - Advanced Materials
SN - 0935-9648
IS - 52
M1 - 2004412
ER -