Self-powered piezoelectric ultraviolet photodetectors based on TiO2-NFs:P(VDF-TrFE) nanocomposites via ultraviolet-assisted thermal annealing for the prevention of ultraviolet overexposure

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers Pub Date : 2024-11-07 DOI:10.1016/j.jtice.2024.105808

Jer-Chyi Wang , Tzu-Chuan Yang , Tzu-Wei Hsu , Ping-Jung Huang , Peng-Nang Chen , Chen-Yang Tseng , Ting-Han Lin , Jia-Mao Chang , Chang-Heng Liu , Wen-Ling Yeh , Ming-Chung Wu

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引用次数: 0

Abstract

Background

Ultraviolet (UV) radiation overexposure due to severe ozone layer depletion increases the risk of skin cancer. However, the traditional UV index meter needs the power supply which is not convenient for outdoor use. The study aims to develop a UV overexposure warning system with a self-powered piezoelectric UV photodetector to provide a real-time UV index.

Method

A self-powered piezoelectric UV photodetector with TiO₂-nanofibers (TiO₂-NFs)-doped poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) nanocomposite films via ultraviolet-assisted thermal annealing was fabricated. A lumped circuit was designed to realize the stepping illumination of light-emitting diodes (LEDs) under continuous tapping of self-powered piezoelectric UV photodetectors.

Significant Findings

At a fixed 40-kPa pressure and 2-Hz frequency with varying UV irradiation power densities, the self-powered piezoelectric UV photodetectors exhibited outstanding UV detection capabilities, with a responsivity and detectivity for 0.14 mA/W and 4 × 10⁸ Jones, respectively. A UV overexposure warning system was established by connecting a self-powered piezoelectric UV photodetector with a lumped circuit to achieve the stepping illumination of LEDs under continuous tapping, giving warnings for those performing outdoor activities to avoid UV overexposure.

Abstract Image

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基于 TiO2-NFs:P(VDF-TrFE) 纳米复合材料的自供电压电紫外线光电探测器，通过紫外线辅助热退火防止紫外线过度照射

背景由于臭氧层严重破坏，过度暴露于紫外线（UV）辐射会增加患皮肤癌的风险。然而，传统的紫外线指数仪需要电源，不方便在户外使用。方法通过紫外辅助热退火技术，用 TiO2 纳米纤维（TiO2-NFs）掺杂聚偏氟乙烯-三氟乙烯（P(VDF-TrFE)）纳米复合薄膜制作了自供电压电紫外线光电探测器。在固定的 40-kPa 压力和 2-Hz 频率条件下，随着紫外线辐照功率密度的变化，自供电压电紫外线光电探测器表现出卓越的紫外线检测能力，其响应率和检测率分别为 0.14 mA/W 和 4 × 108 Jones。通过将自供电压电紫外线光电探测器与叠加电路连接，建立了紫外线过曝警告系统，实现了 LED 灯在连续敲击下的步进式照明，为进行户外活动的人们提供了避免紫外线过曝的警告。

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来源期刊

Journal of the Taiwan Institute of Chemical Engineers 工程技术-工程：化工

CiteScore

9.10

自引率

14.00%

发文量

362

审稿时长

35 days

期刊介绍： Journal of the Taiwan Institute of Chemical Engineers (formerly known as Journal of the Chinese Institute of Chemical Engineers) publishes original works, from fundamental principles to practical applications, in the broad field of chemical engineering with special focus on three aspects: Chemical and Biomolecular Science and Technology, Energy and Environmental Science and Technology, and Materials Science and Technology. Authors should choose for their manuscript an appropriate aspect section and a few related classifications when submitting to the journal online.