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Arrayed CdTeMicrodots and Their Enhanced Photodetectivity via Piezo-Phototronic Effect.

ABSTRACT: In this paper, a photodetector based on arrayed CdTe microdots was fabricated on Bi coated transparent conducting indium tin oxide (ITO)/glass substrates. Current-voltage characteristics of these photodetectors revealed an ultrahigh sensitivity under stress (in the form of force through press) while compared to normal condition. The devices exhibited excellent photosensing properties with photoinduced current increasing from 20 to 76 μA cm-2 under stress. Furthermore, the photoresponsivity of the devices also increased under stress from 3.2 × 10-4 A/W to 5.5 × 10-3 A/W at a bias of 5 V. The observed characteristics are attributed to the piezopotential induced change in Schottky barrier height, which actually results from the piezo-phototronic effect. The obtained results also demonstrate the feasibility in realization of a facile and promising CdTe microdots-based photodetector via piezo-phototronic effect.

SUBMITTER: Lee DJ

PROVIDER: S-EPMC6409905 | biostudies-other | 2019 Feb

REPOSITORIES: biostudies-other

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Arrayed CdTeMicrodots and Their Enhanced Photodetectivity via Piezo-Phototronic Effect.

Lee Dong Jin DJ Mohan Kumar G G Ilanchezhiyan P P Xiao Fu F Yuldashev Sh U SU Woo Yong Deuk YD Kim Deuk Young DY Kang Tae Won TW

Nanomaterials (Basel, Switzerland) 20190201 2

In this paper, a photodetector based on arrayed CdTe microdots was fabricated on Bi coated transparent conducting indium tin oxide (ITO)/glass substrates. Current-voltage characteristics of these photodetectors revealed an ultrahigh sensitivity under stress (in the form of force through press) while compared to normal condition. The devices exhibited excellent photosensing properties with photoinduced current increasing from 20 to 76 μA cm<sup>-2</sup> under stress. Furthermore, the photorespons ...[more]

PMID: 30717115

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