Disentangling the Role of the SnO Layer on the Pyro-Phototronic Effect in ZnO-Based Self-Powered Photodetectors.

Autor: Vieira EMF; CMEMS - UMinho, University of Minho, Campus de Azurem, Guimarães, 4804-533, Portugal.; LABBELS -Associate Laboratory, Braga, Guimarães, Portugal., Silva JPB; Physics Center of Minho and Porto Universities (CF-UM-UP), University of Minho, Campus de Gualtar, Braga, 4710-057, Portugal.; Laboratory of Physics for Materials and Emergent Technologies, LapMET, University of Minho, Braga, 4710-057, Portugal., Gwozdz K; Department of Quantum Technologies, Wroclaw University of Science and Technology, Wroclaw, 50-370, Poland., Kaim A; Department of Quantum Technologies, Wroclaw University of Science and Technology, Wroclaw, 50-370, Poland., Gomes NM; CMEMS - UMinho, University of Minho, Campus de Azurem, Guimarães, 4804-533, Portugal.; LABBELS -Associate Laboratory, Braga, Guimarães, Portugal., Chahboun A; Université Abdelmalek Essaadi, FST Tanger, Laboratoire Couches Minces et Nanomatériaux (CMN), Tanger, 90000, Morocco., Gomes MJM; Physics Center of Minho and Porto Universities (CF-UM-UP), University of Minho, Campus de Gualtar, Braga, 4710-057, Portugal.; Laboratory of Physics for Materials and Emergent Technologies, LapMET, University of Minho, Braga, 4710-057, Portugal., Correia JH; CMEMS - UMinho, University of Minho, Campus de Azurem, Guimarães, 4804-533, Portugal.; LABBELS -Associate Laboratory, Braga, Guimarães, Portugal.
Jazyk: angličtina
Zdroj: Small (Weinheim an der Bergstrasse, Germany) [Small] 2023 Aug; Vol. 19 (32), pp. e2300607. Date of Electronic Publication: 2023 Apr 22.
DOI: 10.1002/smll.202300607
Abstrakt: Self-powered photodetectors (PDs) have been recognized as one of the developing trends of next-generation optoelectronic devices. Herein, it is shown that by introducing a thin layer of SnO film between the Si substrate and the ZnO film, the self-powered photodetector Al/Si/SnO/ZnO/ITO exhibits a stable and uniform violet sensing ability with high photoresponsivity and fast response. The SnO layer introduces a built-in electrostatic field to highly enhance the photocurrent by over 1000%. By analyzing energy diagrams of the p-n junction, the underlying physical mechanism of the self-powered violet PDs is carefully illustrated. A high photo-responsivity (R) of 93 mA W -1 accompanied by a detectivity (D*) of 3.1 × 10 10 Jones are observed under self-driven conditions, when the device is exposed to 405 nm excitation laser wavelength, with a laser power density of 36 mW cm -2 and at a chopper frequency of 400 Hz. The Si/SnO/ZnO/ITO device shows an enhancement of 3067% in responsivity when compared to the Al/Si/ZnO/ITO. The photodetector holds an ultra-fast response of ≈ 2 µs, which is among the best self-powered photodetectors reported in the literature based on ZnO.
(© 2023 The Authors. Small published by Wiley-VCH GmbH.)
Databáze: MEDLINE
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