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IR Spectrometers

IR Spectrometers

There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...

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An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation

An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation

Published on: February 27, 2019

Self-powered electrochromic devices with tunable infrared intensity.

Jiangman Sun¹, Xiong Pu², Chunyan Jiang²

¹CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China.

Science Bulletin

|January 20, 2023

Summary

A self-powered infrared detector was created using a triboelectric nanogenerator (TENG) and an infrared electrochromic device (IR-ECD). This TENG-driven IR-ECD offers tunable intensity and potential for self-powered camouflage and thermal control applications.

Keywords:

Flexible Infrared electrochromical device Self-powered Thermal control Triboelectric nanogenerator

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Area of Science:

Energy Harvesting
Nanotechnology
Infrared Optics

Background:

Triboelectric nanogenerators (TENGs) efficiently convert mechanical energy into electricity for portable devices.
Infrared electrochromic devices (IR-ECD) offer tunable optical properties in the infrared spectrum.

Purpose of the Study:

To develop a self-powered infrared detector by integrating a TENG with an IR-ECD.
To demonstrate tunable intensity control for infrared detection using TENG-driven electrochromic reactions.

Main Methods:

Assembly of a flexible infrared electrochromic device (IR-ECD) with a stable triboelectric nanogenerator (TENG).
Operation of the IR-ECD in the mid-infrared region (8-14 μm) driven by TENG-generated electricity.
Characterization of infrared reflectance contrast and thermal imaging capabilities.

Main Results:

Achieved an average infrared reflectance contrast of 46% in the 8-14 μm range.
Demonstrated a clear thermal image change, indicating effective infrared detection.
The TENG successfully powered the IR-ECD for stable and tunable performance.

Conclusions:

The TENG-driven IR-ECD is a viable solution for self-powered infrared detection.
This technology holds promise for applications in self-powered camouflage and dynamic thermal control.
Integration of energy harvesting and responsive materials enables novel optoelectronic functionalities.