Enhanced performance of near-infrared photodetectors based on InGaAs nanowires enabled by a two-step growth method

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Detail(s)

Original languageEnglish
Pages (from-to)17025-17033
Journal / PublicationJournal of Materials Chemistry C
Volume8
Issue number47
Online published22 Oct 2020
Publication statusPublished - 21 Dec 2020

Abstract

Because of the tunable bandgap, high carrier mobility and strong interaction with light, ternary III-V nanowires (NWs) have been demonstrated with tremendous potential for advanced electronics and optoelectronics. However, their further performance enhancement and practical implementation are still a challenge in the presence of kinked morphology and surface coating of the nanowires. Here, we report the development of high-performance near-infrared photodetectors based on high-quality InGaAs nanowires enabled by the two-step chemical vapor deposition method. Importantly, the optimized In0.51Ga0.49As NW devices exhibit excellent photodetector performance at room temperature, with a responsivity of 7300 A W-1, a specific detectivity of 4.2 × 1010 Jones and an external quantum efficiency of 5.84 × 106% under 1550 nm irradiation. The rise and decay time constants are as efficient as 480 μs and 810 μs, respectively, constituting a record high performance among all arsenide-based nanowire photodetectors. Large-scale NW parallel-arrayed devices are also fabricated to illustrate their promising potential for next-generation ultrafast high-responsivity near-infrared photodetectors.

Citation Format(s)

Enhanced performance of near-infrared photodetectors based on InGaAs nanowires enabled by a two-step growth method. / Zhang, Heng; Wang, Wei; Yip, SenPo; Li, Dapan; Li, Fangzhou; Lan, Changyong; Wang, Fei; Liu, Chuntai; Ho, Johnny C.

In: Journal of Materials Chemistry C, Vol. 8, No. 47, 21.12.2020, p. 17025-17033.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review