本文以Zn(CH3COO)2·2H2O、CdCl2和硫脲的水溶液分别为前驱体,采用超声喷雾热解法在ITO导电玻璃上成功的制备了CdS量子点敏化ZnO薄膜(ZnO∶ CdS).通过扫描电镜(SEM),X射线衍射(XRD),光致发光(PL)谱和吸收光谱对CdS量子点敏化ZnO薄膜形貌,结构和光学性能进行了研究.SEM图表明CdS量子点已成功沉积到ZnO薄膜上,量子点呈颗粒状,直径约71 nm.XRD结果显示,除观察到原有的ZnO特征峰外,在2θ=30.3°处有一明显的特征峰,对应着CdS的(111)晶面.PL谱图表明在325 nm的光激发下,CdS量子点敏化ZnO薄膜在400 nm处有一较强的紫外发射峰,在500～700 nm处有一个较宽的黄绿发射带.吸收光谱表明,CdS量子点敏化后ZnO薄膜在可见光区的吸收边为586 nm.
参考文献
| [1] | Nozik, A.J.;Beard, M.C.;Luther, J.M.;Law, M.;Ellingson, R.J.;Johnson, J.C. .Semiconductor quantum dots and quantum dot arrays and applications of multiple exciton generation to third-generation photovoltaic solar cells[J].Chemical Reviews,2010(11):6873-6890. |
| [2] | Christophe J.Barbe;Francine Arendse;Pascal COmte .Nanocrystalline titanium oxide electrodes for photovoltaic applications[J].Journal of the American Ceramic Society,1997(12):3157-3171. |
| [3] | Nozik AJ. .Quantum dot solar cells[J].Physica, E. Low-dimensional systems & nanostructures,2002(1/2):115-120. |
| [4] | R. D. Schaller;V. I. Klimov .High Efficiency Carrier Multiplication in PbSe Nanocrystals: Implications for Solar Energy Conversion[J].Physical review letters,2004(18):186601.1-186601.4. |
| [5] | Beard MC;Knutsen KP;Yu PR;Luther JM;Song Q;Metzger WK;Ellingson RJ;Nozik AJ .Multiple exciton generation in colloidal silicon nanocrystals[J].Nano letters,2007(8):2506-2512. |
| [6] | Sun, WT;Yu, Y;Pan, HY;Gao, XF;Chen, Q;Peng, LM .CdS quantum dots sensitized TiO2 nanotube-array photoelectrodes[J].Journal of the American Chemical Society,2008(4):1124-1125. |
| [7] | T. Ganesh, Rajaram S. Mane;Gangeri Cai;Jin-Ho Chang .ZnO Nanoparticles-CdS Quantum Dots/N3 Dye Molecules: Dual Photosensitization[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2009(18):7666-7669. |
| [8] | Shan FK;Liu GX;Lee WJ;Lee GH;Kim IS;Shin BC .Aging effect and origin of deep-level emission in ZnO thin film deposited by pulsed laser deposition[J].Applied physics letters,2005(22):1910-1-1910-3-0. |
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