体系pH对MoO_3薄膜结构及光致变色性能的影响
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摘要
采用溶胶-凝胶法制备了MoO3光致变色薄膜,主要探讨溶液pH值对薄膜结构及性能的影响,运用XRD、SEM、UV-Vis-DRS及全自动色差计对氧化钼薄膜的结构及性能进行了表征.实验表明:随溶液pH值的升高,MoO3薄膜光致变色性能先增强后减弱.pH=1.0时薄膜结晶度较好,颗粒粒径较小,分布较均匀,激发波长蓝移,薄膜的吸收光波区域变宽,色差值达到2.427,光致变色性能提高.
The photochromic MoO3 thin films were prepared via sol-gel dip-coating method.The effects of solution pH on the microstructure and properties of MoO3 thin films were investigated by X-ray diffraction,scanning electron microscope and ultraviolet-visible absorption spectroscopy.The results show that the photochromic properties of MoO3 thin films first increase and then decrease with the rise of pH value of reaction system.When the pH was 1.0,the MoO3 thin film has higher crystallinity,smaller particle size,and more homogeneous distribution.Its chromatism value also reaches its maximum value of 2.427.The wavelength of the excitation light shifts to a short-wavelength and the light absorption region of the thin film becomes wider at pH value of reaction system was 1.0.Accordingly,the photochromic properties are enhanced.
The photochromic MoO3 thin films were prepared via sol-gel dip-coating method.The effects of solution pH on the microstructure and properties of MoO3 thin films were investigated by X-ray diffraction,scanning electron microscope and ultraviolet-visible absorption spectroscopy.The results show that the photochromic properties of MoO3 thin films first increase and then decrease with the rise of pH value of reaction system.When the pH was 1.0,the MoO3 thin film has higher crystallinity,smaller particle size,and more homogeneous distribution.Its chromatism value also reaches its maximum value of 2.427.The wavelength of the excitation light shifts to a short-wavelength and the light absorption region of the thin film becomes wider at pH value of reaction system was 1.0.Accordingly,the photochromic properties are enhanced.
引文
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[22]Tao C,Xie G,Liu C,et al.Semitransparent inverted polymer solar cells with MoO3/Ag/MoO3as transparent electrode[J].Applied Physics Letters,2009,95(5):053303.
[23]余火根,余家国,郭瑞,等.溶胶-凝胶薄膜的制备和应用[J].材料导报,2003,17(6):31-33.
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[25]张克从,张乐潓.晶体生长科学与技术[M].北京:北京科学出版社,1981.
[26]杨玉芬,陈清如.纳米材料的基本特征与纳米科技的发展[J].中国粉体技术,2002,8(3):22-27.
[2]沈庆月,陆春华,许仲梓.光致变色材料的研究与应用[J].材料导报,2006,19(10):31-35.
[3]Lin S Y,Wang C M,Kao K S,et al.Electrochromic properties of MoO3thin films derived by a sol-gel process[J].Journal of Sol-gel Science and Technology,2010,53(1):51-58.
[4]孔庆升.薄膜电子学[M].北京:电子工业出版社,1994.
[5]李亚平,朱绪敏,赵绍娟,等.三氧化钼薄膜的制备及其光学性质研究(英文)[J].安徽大学学报:自然科学版,2013,5:80-85.
[6]阳雅丽,沈毅.三氧化钼薄膜材料的制备及其变色性能的研究[J].中国陶瓷,2012,7:011.
[7]孙杰兵,王世敏.三氧化钼薄膜的制备和结构研究[J].武汉大学学报:理学版,2002,48(5):589-592.
[8]Zayim E O,Baydogan N D.Irradiation effect in WO3thin films[J].Solar Energy Materials and Solar Cells,2006,90(4):402-413.
[9]Kwak D J,Kuantama E,Han D W,et al.Preparation of molybdenum oxide film by a magnetic null discharge sputtering method[J].Surface and Coatings Technology,2008,202(22):5452-5456.
[10]邵红红,徐涛,王晓静,等.磁控溅射硅钼薄膜的抗氧化性能研究[J].功能材料,2012,43(15):2095-2097.
[11]汪中柱,程继健.溶胶-凝胶法制备氧化钼薄膜[J].华东化工学院学报,1992,18(A00):48-54.
[12]Julien C,Khelfa A,Guesdon J P,et al.Lithium intercalation in MoO3:A comparison between crystalline and disordered phases[J].Applied Physics A,1994,59(2):173-178.
[13]Mariotti D,Lindstrm H,Bose A C,et al.Monoclinicβ-MoO3 nanosheets produced by atmospheric microplasma:Application to lithium-ion batteries[J].Nanotechnology,2008,19(49):495302.
[14]Epifani M,Imperatori P,Mirenghi L,et al.Synthesis and characterization of MoO3thin films and powders from a molybdenum chloromethoxide[J].Chemistry of Materials,2004,16(25):5495-5501.
[15]Sabhapathi V K,Hussain O M,Uthanna S,et al.Ac conductivity studies on Al/MoO3/Al sandwich structures[J].Materials Science and Engineering:B,1995,32(1):93-97.
[16]Ramana C V,Utsunomiya S,Ewing R C,et al.Structural stability and phase transitions in WO3thin films[J].The Journal of Physical Chemistry B,2006,110(21):10430-10435.
[17]Ramana C V,Atuchin V V,Troitskaia I B,et al.Lowtemperature synthesis of morphology controlled metastable hexagonal molybdenum trioxide(MoO3)[J].Solid State Communications,2009,149(1):6-9.
[18]López‐Carreo L D,Pardo A,Zuluaga M,et al.Electrical transport properties of MoO3thin films prepared by laser assisted evaporation[J].Physica Status Solidi(C),2007,4(11):4064-4069.
[19]Hsu C S,Chan C C,Huang H T,et al.Electrochromic properties of nanocrystalline MoO3thin films[J].Thin Solid Films,2008,516(15):4839-4844.
[20]Mohamed S H,El-Rahman A M A,Ahmed M R.Investigation of zirconium oxynitride thin films deposited by reactive pulsed magnetron sputtering[J].Journal of Physics D:Applied Physics,2007,40(22):7057.
[21]Krger M,Hamwi S,Meyer J,et al.Role of the deep-lying electronic states of MoO3in the enhancement of hole-injection in organic thin films[J].Applied Physics Letters,2009,95(12):123301-123303.
[22]Tao C,Xie G,Liu C,et al.Semitransparent inverted polymer solar cells with MoO3/Ag/MoO3as transparent electrode[J].Applied Physics Letters,2009,95(5):053303.
[23]余火根,余家国,郭瑞,等.溶胶-凝胶薄膜的制备和应用[J].材料导报,2003,17(6):31-33.
[24]倪星元,沈军,张志华.纳米材料的理化特性与应用[M].北京:化学工业出版社,2006.
[25]张克从,张乐潓.晶体生长科学与技术[M].北京:北京科学出版社,1981.
[26]杨玉芬,陈清如.纳米材料的基本特征与纳米科技的发展[J].中国粉体技术,2002,8(3):22-27.