李先卯,简基康,吴荣,孙言飞,李锦

• 1:新疆大学物理科学与技术学院

摘要(Abstract)：

本文以氯化镉(CdCl2·2.5H2O)、碲粉(Te)为源,硼氢化钾(KBH4)为还原剂,使用溶剂热法制备了厚100nm左右,宽200～400nm,长2～3μm的碲化镉(CdTe)纳米带.采用X射线衍射(XRD)、扫描电子显微镜(SEM)和紫外可见吸收光谱(UV-vis spectra)等测试手段对产物的物相、形貌及光学性能进行了表征.研究了不同的反应温度、镉源和反应时间对产物物相和形貌的影响,并初步推测了带状产物的形成机理.发现产物形貌随温度升高由带状变为颗粒状.不同镉源对带状形貌的形成有很大影响,用Cd粉为镉源时,无法得到带状CdTe产物.反应时间较短时,产物为棒状和无定形颗粒,反应时间过长,产物尺寸差异变大.对光学性能表征时发现CdTe带状产物的紫外吸收出现了一定的蓝移,禁带宽度与块体材料相比偏大了0.4eV.

关键词(KeyWords)： 溶剂热;碲化镉;纳米带;硼氢化钾

Abstract:

Keywords:

基金项目(Foundation): 新疆维吾尔自治区自然科学基金项目(2012211A010);; 新疆大学博士科研启动基金项目(BS090113)

作者(Author): 李先卯,简基康,吴荣,孙言飞,李锦

参考文献(References)：

• [1]Romeo N,Bosio A,Romeo A.An Innovative Process Suitable to Produce High-effciency CdTe/CdS Thin-film Modules[J].Solar Energy Materials&Solar Cells,2010,94:2-7.
• [2]Li J,Yang L Y,Jian J K,et al.Effects of Sn-doping on Morphology and Optical Properties of CdTe Polycrystalline Films[J].Journal of Semiconductors,2009,30(11):112003.
• [3]Li Y D,Liao H W,Qian Y T,et al.Nonaqueous Synthesis of CdS Nanorod Semiconductor[J].Chem Mater,1998,10(9):2301-2303.
• [4]Yang J,Yu S H,Qian Y T,et al.CdTe Nanocrystallites With Different Morphologies and Phases by Solvothermal Process[J].Materials Research Bulletin,2000,35:1509-1515.
• [5]Deng Z X,Li L B,Li Y D,et al.Novel InorganicOrganic-Layered Structures:Crystallographic Understanding of BothPhase and Morphology Formations of One-Dimensional CdE(E=S,Se,Te)Nanorods in Ethylenediamine[J].InorganicChemistry,2003,42(7):2331-2341.
• [6]Wang Y,Tang Z Y,Kotov N,et al.Mirror-Like Photoconductive Layer-by-Layer Thin Films of Te Nanowires:The Fusionof Semiconductor,Metal,and Insulator Properties[J].Adv Mater,2006,18:518-522.
• [7]Yang L Y,Li J,Jian J K,et al.Novel route to scalable synthesis of II–VI semiconductor nanowires:Catalyst-assistedvacuum thermal evaporation[J].Journal of Crystal Growth,2010,312:2852-2856.
• [8]Zhao X B,Ji X H,Lu B H,et al.Effect of solvent on the microstructures of nanostructured Bi2Te3 prepared by solvothermalsynthesis[J].Journal of alloys and compounds,2004,368:349-352.
• [9]Wang W Z,Poudel B,Ren Z F,et al.High-Yield Synthesis of Single-Crystalline Antimony Telluride Hexagonal NanoplatesUsing a Solvothermal Approach[J].J AM CHEM SOC,2005,127:13792-13793.
• [10]Gong H B,Hao X P,Gao C,et al.Facile aqueous synthesis and growth mechanism of CdTe nanorods[J].Nanotechnology,2008,19:445603.
• [11]Xi G C,Wang X,Qian Y T,et al.Te/Carbon and Se/Carbon Nanocables:Size-Controlled in Situ Hydrothermal Synthesisand Applications in Preparing Metal M/Carbon Nanocables(M)Tellurides and Selenides)[J].J Phys Chem C,2008,112:965-971.
• [12]Zheng R B,Guo S J,Dong S J.Synthesis of CdTe Nanocrystals Using Te Nanorods as the Te Source and the Formation ofMicrotubes with Red Fluorescence[J].Inorganic Chemistry,2007,46(17):6920-6923.
• [13]Zhang L H,Yang H Q,Li Li,et al.Controlled Solvothermal Synthesis of Nanosheets,Nanobelts,and Ultralong NanobeltArrays with Honeycomb-Like Micropatterns of ZnSe on Zinc Substrate[J].Inorganic Chemistry.2008,47(24):11950-11957.
• [14]Cao X B,Lan X M,Zhao C,et al.From CdTe Nanoparticles Precoated on Silicon Substrate to Long Nanowires andNanoribbons:Oriented Attachment Controlled Growth[J].Crystal Growth&Design,2008,8(2):575-580.
• [15]Yin H Y,Xu Z D,Bai J Y,et al.Ethylenediamine Assisted Growth of Single Crystal Tellurium Channels[J].MaterialsLetters,2005,59:3779-3782.