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A flexible self-powered ultra-violet photodetector based on sandwiched zinc oxide nanorods between polyaniline layers

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Abstract

Nowadays, the improvement of flexible self-powered ultra-violet light (UV) photodetectors (UPs) to maintain health and optimization of photovoltaic energy utilization has drawn immense attention. In this literature, a Polyaniline/Zinc oxide nanorods /Polyaniline heterojunction (PZP)-based self-powered UP (SZP) on a flexible substrate is constructed. The morphology, structure, and optical features of the synthesized materials and PZP were precisely examined. Upon examining the I-V-T plots for the SZP, the device exhibited nonlinear rectifying characteristics under forward-reverse bias voltages and different temperatures. The Richardson constant and mean built-in potential were found to be 29 A.cm2.K2 and 0.02 eV, respectively. The assessment of the I–V characteristic of the SZP under UV illumination at zero bias voltage offers a short-circuit current which proves that the device can generate an independent photocurrent from external bias voltage. Moreover, the SZP showed an outstanding maximum photocurrent (Iph,Max) of 71.96 µA and a response speed of 1.08 s at a light power density of 25.48 mW/cm2, while it displayed significant photoresponsivity of 50.38 mA/W under light power density of 1.02 mW/cm2 at zero bias voltage. The effect of external strain on the Iph,Max of the device was offered an increment of the relative Iph,Max up to 2.86% under a compressive strain of − 1.01% at UV illumination of 1.02 mW/cm2. Furthermore, our hand-made device presented less than 10% change in photoresponsivity over 5 months, which provides long-term performance with the correct accuracy and reliability.

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  1. Department of Electrical and Medical Engineering, Mazandaran University of Science and Technology, Babol, Iran

    Farnaz Hadizadeh & Shahruz Nasirian

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  1. Farnaz Hadizadeh
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  2. Shahruz Nasirian
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All authors contributed to the study’s conception, design, and implementation. FH contributed toward methodology, software, validation, investigation, formal analysis, resources, data curation, and writing—original draft. SN contributed toward conceptualization, methodology, software, validation, investigation, resources, data curation, writing—original draft, writing—review & editing, visualization, supervision, and project administration.

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Correspondence to Shahruz Nasirian.

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Hadizadeh, F., Nasirian, S. A flexible self-powered ultra-violet photodetector based on sandwiched zinc oxide nanorods between polyaniline layers. J Mater Sci: Mater Electron 34, 2219 (2023). https://doi.org/10.1007/s10854-023-11584-3

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  • DOI: https://doi.org/10.1007/s10854-023-11584-3

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