光电子快报(英文版), 2014, 10 (1): 43, Published Online: Oct. 12, 2017   

Femtosecond laser deposition of TiO2nanoparticle- assembled films with embedded CdS nanoparticles

Author Affiliations
1 School of Electronic Engineering, Tianjin University of Technology and Education, Tianjin 300222, China
2 CNR-SPIN and Dipartimento di Fisica, Università degli Studi di Napoli Federico II, Complesso Universitario Monte S. Angelo, Via Cintia, Napoli 80126, Italy
3 Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, and Key Laboratory of Heat Transfer and Energy Conversion, Beijing Municipality, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
4 CNR-SPIN UOS Salerno, Via Ponte don Melillo, Fisciano (SA) 84084, Italy
5 Ultrafast Laser Laboratory, and Key Laboratory of Opto-electronic Information Technology, Ministry of Education, Tianjin University, Tianjin 300072, China
Abstract
Based on the normal pulsed laser ablation method, femtosecond pulsed laser deposition (fs-PLD) is adopted in vacuum for the production of TiO2nanoparticle-assembled films. We study the morphology and electronic characteristics of TiO2nanoparticle-assembled films deposited at different oxygen background gas pressures from high vacuum (~10-4 Pa) to 100 Pa and different deposition time. Our results show that TiO2nanoparticle-assembled films obtained in high vacuum present both a mixture with rutile phase and anatase phase and a pure rutile phase. At the same time, there are more mesoporous structures in the film after annealing, which is beneficial for the enhancement of photocatalytic activity. In water splitting experiment, part of the TiO2nanoparticle-assembled films embedded with a small mass fraction of CdS nanoparticles (~5%) present an interesting photocurrent enhancement with a maximum value of ~0.2 mA/cm2 under a solar simulator.

NI Xiao-chang, SANG Li-xia, ZHANG Hong-jie, Anoop Kiliyanamky, Salvatore Amoruso, WANG Xuan, Rosalba Fittipaldi, LI Tong, HU Ming-lie, XU Li-juan. Femtosecond laser deposition of TiO2nanoparticle- assembled films with embedded CdS nanoparticles[J]. 光电子快报(英文版), 2014, 10(1): 43.

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