title: Synthesis and optoelectronic properties of quaternary GaInAsSb alloy nanosheets.
abstract: Quasi-one-dimensional (1D) nanostructures have been extensively explored for electronic and optoelectronic devices on account of their unique morphologies and versatile physical properties. Here, we report the successful synthesis of GaInAsSb alloy nanosheets by a simple chemical vapor deposition method. The grown GaInAsSb alloy nanosheets are pure zinc-blende single crystals, which show nanosize-induced extraordinary optoelectronic properties as compared with bulk materials. μ-Raman spectra exhibit a multi-mode phonon vibration behavior with clear frequency shifts under varied laser power. Photoluminescence measurements reveal a strong light emission in the near-infrared region (1985 nm), and the obtained Varshni thermal coefficients α and β are smaller than those of the bulk counterparts due to the size confinement effect. In addition, photodetectors (PDs) based on these single-alloy nanosheets were constructed for the first time. The PDs show a strong response in the near-infrared region with the external quantum efficiency of 8.05 × 104%, and the responsivity of 0.675 × 103A W-1. These novel nanostructures would make contributions to the study of fundamental physical phenomena in quasi-1D nanomaterial systems and can be potential building blocks for optoelectronic and quantum devices.
authors.affiliation: Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education, School of Physics and Electronic Science, and State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, People's Republic of China.
authors.forename: Xinliang
authors.initials: X
authors.lastname: Chen
authors.forename: Honglai
authors.initials: H
authors.lastname: Li
authors.forename: Zhaoyang
authors.initials: Z
authors.lastname: Qi
authors.forename: Tiefeng
authors.initials: T
authors.lastname: Yang
authors.forename: Yankun
authors.initials: Y
authors.lastname: Yang
authors.forename: Xuelu
authors.initials: X
authors.lastname: Hu
authors.forename: Xuehong
authors.initials: X
authors.lastname: Zhang
authors.forename: Xiaoli
authors.initials: X
authors.lastname: Zhu
authors.forename: Xiujuan
authors.initials: X
authors.lastname: Zhuang
authors.forename: Wei
authors.initials: W
authors.lastname: Hu
authors.forename: Anlian
authors.initials: A
authors.lastname: Pan