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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. Samples for...

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Updated: May 8, 2026

Synthesis and Characterization of High c-axis ZnO Thin Film by Plasma Enhanced Chemical Vapor Deposition System and its UV Photodetector Application

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Self-powered UV-vis photodetector based on ZnIn2S4/hydrogel interface.

Lily Mandal¹, Nilima S Chaudhari, Satishchandra Ogale

¹Centre of Excellence in Solar Energy, Physical and Materials Chemistry Division, National Chemical Laboratory (CSIR-NCL) , Pune, Maharashtra 411008, India.

ACS Applied Materials & Interfaces

|August 28, 2013

Summary

This summary is machine-generated.

This study introduces a novel self-powered UV-visible light photodetector using zinc indium disulfide (ZnIn2S4) nanopetals and agarose gel. The hybrid device exhibits a significantly enhanced photoresponse under zero bias, outperforming the bare ZnIn2S4 film.

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Area of Science:

Materials Science
Nanotechnology
Optoelectronics

Background:

Vertically aligned ZnIn2S4 nanopetal films on FTO-coated glass are synthesized for photosensing applications.
Investigating the photosensing properties of these films with and without agarose gel is crucial for device enhancement.

Purpose of the Study:

To examine the photosensing characteristics of ZnIn2S4 nanopetal films.
To evaluate the performance of a hybrid electronic-iontronic system incorporating agarose gel for self-powered photodetector applications.

Main Methods:

Hydrothermal growth of vertically aligned ZnIn2S4 nanopetal films on FTO-coated glass.
Surface dispensation of agarose gel to create a hybrid interface.
Characterization of photosensing properties, including photoresponse under zero bias and applied bias.

Main Results:

The bare ZnIn2S4 nanopetal film shows no photoresponse at zero bias.
The hybrid ZnIn2S4/agarose gel system demonstrates a strong photoresponse even under zero bias, indicating self-powered operation.
The zero-bias photoresponse of the hybrid device is approximately 100 times stronger than the bare ZnIn2S4 device at -1.5 V bias, with no significant degradation in response time.

Conclusions:

The integration of agarose gel creates an efficient hybrid electronic-iontronic interface for self-powered photodetectors.
The developed ZnIn2S4/gel photodetector shows promising performance for UV-visible light detection without external power.
Further investigation into the operating mechanisms of this self-powered photodetector is warranted.