相关实验视频

Updated: Jul 28, 2025

Fabrication and Testing of Photonic Thermometers

Fabrication and Testing of Photonic Thermometers

Published on: October 24, 2018

高灵敏的光感应热弹性光谱氧气传感器,配合合石英调音叉的光电和热弹性效应

Cunguang Lou¹, Jialiang Dai¹, Yaxin Wang¹

¹College of Electronic Information and Engineering & Hebei Key Laboratory of Digital Medical Engineering, Hebei University, Baoding 071000, China.

|May 30, 2023

概括

一种新的气体检测方法使用矿涂层的石英调音叉 (QTF) 来提高灵敏度. 这种光诱导热弹性光谱学 (LITES) 系统显著提高了信号幅度和信号噪声比,用于精确的气体传感.

科学领域:

材料科学材料科学材料科学
频谱学是一种光谱学.
传感器技术传感器技术

背景情况:

石英调音叉 (QTF) 广泛用于共振传感器中.
矿材料具有独特的光电子特性.
开发高度敏感的气体检测方法对于环境监测和安全至关重要.

研究的目的:

提出一种新的光诱导热弹性光谱 (LITES) 气体检测方法.
通过加入CH3NH3PbI3矿来提高QTF传感器的检测性能.
为了研究光电和热弹性性质的联合合效应,以改进气体传感.

主要方法:

在QTF上涂上CH3NH3PbI3薄膜,以与银电极形成矿Schottky结.
使用LITES技术进行气体检测,氧气 (O2) 作为目标分析物.
分析2f信号幅度,信号与噪声比 (SNR),最小检测极限 (MDL) 和规范噪声等效吸收系数 (NNEA).

主要成果:

与标准QTF相比,CH3NH3PbI3矿Schottky结显著增加了2f信号幅度约106倍和SNR约114倍.
该LITES系统实现了260ppm的最小检测极限 (MDL) 和9.21×10^-13cm^-1·W·Hz^-1/2.2的正常化噪声等效吸收系数 (NNEA).
艾伦差异分析显示,检测灵敏度为83ppm,平均时间为564秒.

结论:

矿Schottky连接与QTF共振检测的整合提供了一个高度敏感的光学气体检测策略.
这种新的方法代表了QTF共振检测和矿Schottky连接用于光学气体传感的首次成功组合.
开发的LITES系统显示了先进气体检测应用的有前途潜力.

关键词:

CH3NH3PbI3 佩洛夫斯基特是一种气体检测气体检测气体检测光诱导的热弹性光谱学氧气氧气是一种石英调音叉的使用方法

更多相关视频

Author Spotlight: Fabrication of a Low-Cost, Fiber-Coupled, and Air-Spaced Fabry-Pérot Etalon

Author Spotlight: Fabrication of a Low-Cost, Fiber-Coupled, and Air-Spaced Fabry-Pérot Etalon

Published on: February 3, 2023

High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings

High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings

Published on: April 16, 2017

相关概念视频

Flame Photometry: Overview

Flame Photometry: Overview

Flame photometry, also known as flame emission spectrometry, is a technique used for the qualitative and quantitative analysis of elements present in a sample using a flame as the source of excitation energy. The concept of flame photometry was realized in the early 1860s by Kirchhoff and Bunsen, who discovered that specific elements emit characteristic radiation when excited in flames. The first instrument developed for this purpose was used to measure sodium (Na) in plant ash using a Bunsen...

UV–Vis Spectrometers

UV–Vis Spectrometers

The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.