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Pulsed laser preparation of nano titanium dioxide film and its photoelectric properties of

Author: ZhengBing
Tutor: BaiXuZuo
School: Heilongjiang University
Course: Polymer Chemistry and Physics
Keywords: The vertical pulse laser deposition Laser-induced transfer Dioxide Photoluminescence
CLC: TB383.1
Type: Master's thesis
Year: 2009
Downloads: 72
Quote: 1
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Abstract


Dioxide as a function of material used in many other areas of the pigments , gas sensing , photovoltaic , photocatalysis , optoelectronic devices , and self-cleaning surfaces . The body of titanium and titanium oxide phase at room temperature is difficult to exhibit photoluminescence properties , limiting its application in optoelectronic integrated circuits . Nanometer size titanium oxide due to its associated electronics and the surface state transitions excited to generate fluorescence emission. This paper the vertical pulse laser deposition method ( VPLD ) , the titanium oxide nano- particles were prepared at room temperature and under atmospheric pressure , to prepare a titanium oxide nano- film on a glass substrate , a titanium target , and using laser induced transfer (LIFT) in the titanium target prepared on titania nanofilm explore different preparation atmosphere , preparation method , the laser output power of film morphology , photoluminescence emission performance . SEM analysis showed that the the argon films prepared on the titanium target and the glass substrate is composed of mutual aggregation of nanoparticles ; air laser induced transfer method the films prepared on the titanium target by highly elongated Hyperbranched linear dioxide nano line network , the titanium target , a thin film obtained by a very compact hyperbranched titania nanowire ; oxygen in the titanium target to the films prepared by the mutual aggregation of the nanoparticles and nanowires . XRD, Raman spectra show that the film consists of a variety of titanium oxide . The photoluminescence spectra showed that the fluorescence response nanofilm sample fluorescence peak at around 440nm , fluorescence derived from the combined effects of the film surface oxygen vacancies and surface defects . Air conditions through VPLD-LIFT method with oxygen under conditions VPLD France prepared titanium oxide nano- film on the titanium target of the laser output power of 12.9W (16A) obtained at 440nm or so strong fluorescence emission intensity, can be used to prepare a photocrosslinkable light emitting material. Dioxide nano thin film prepared oxygen under the conditions of a titanium target used in photovoltaic cells , the test shows that the battery light current response .

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