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Updated: Jun 4, 2025

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

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

Published on: October 3, 2015

Nanoparticle-Composed Photosensitive Thin Films Based on ZnO.

Tina Dilova¹, Anna Dikovska², Aleksandra Baeva¹

¹Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl.11, 1113 Sofia, Bulgaria.

Materials (Basel, Switzerland)

|December 17, 2024

Summary

Atmospheric pulsed laser deposition created porous ZnO and ZnO-TiO2 nanostructures for photosensitive elements. Nanosecond deposition yielded significantly higher photocurrents than picosecond deposition due to better absorption and less recombination.

Keywords:

PLD in open air composites nanoparticles photosensitive properties porous structures

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Last Updated: Jun 4, 2025

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Fabrication of Nano-engineered Transparent Conducting Oxides by Pulsed Laser Deposition

Fabrication of Nano-engineered Transparent Conducting Oxides by Pulsed Laser Deposition

Published on: February 27, 2013

Area of Science:

Materials Science
Nanotechnology
Optoelectronics

Background:

Porous nanostructures offer large surface areas for enhanced material properties.
Pulsed laser deposition (PLD) is a versatile technique for fabricating nanostructured thin films.
ZnO and TiO2 are promising materials for photosensitive applications.

Purpose of the Study:

To investigate the fabrication of photosensitive nanostructures using atmospheric pulsed laser deposition.
To explore the influence of laser ablation regimes (nanosecond vs. picosecond) and target composition (ZnO vs. ZnO-TiO2) on material properties.
To characterize the photosensitivity and electrical properties of the fabricated nanostructures under UV irradiation.

Main Methods:

Atmospheric pulsed laser deposition (PLD) using nanosecond or picosecond lasers.
Ablation of pure ZnO or mixed ZnO-TiO2 targets on quartz substrates with gold electrodes.
Structural, morphological, optical, and electrical characterization of deposited nanostructures.
Measurement of dark current and photogenerated current under UV light exposure.

Main Results:

PLD successfully produced highly porous ZnO and ZnO-TiO2 nanostructures.
Nanosecond-deposited samples exhibited significantly higher dark and photogenerated currents (up to 10^3 times) compared to picosecond-deposited samples.
Composite ZnO-TiO2 samples showed longer rise and decay times for photosensitivity.
Picosecond-deposited samples had lower absorption and higher defect-related recombination, limiting photocurrent.

Conclusions:

The laser ablation regime critically influences the photosensitive properties of ZnO and ZnO-TiO2 nanostructures.
Nanosecond PLD is more effective for fabricating high-performance UV photosensitive elements compared to picosecond PLD.
Composite materials and deposition parameters can be tuned to optimize photosensor response times and performance.