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《Journal of Guangxi Normal University(Natural Science Edition)》 2017-03
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Microwave-assisted Synthesis of CdTe Quantum Dots and Application on Dye-sensitized Solar Cell

LAN Yuwei;YI Qilei;HUANG Yantao;LIU Jinling;TAN Yanfang;School of Chemistry and Chemical Engineering,Guangxi University;Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology;  
High-quality CdTe quantum dots were synthesized by microwave-assisted method with CdCl_2 and Na_2TeO_3 as reactants and thiohydracrylic acid as a reducing and stabilizing agent.TiO_2 nanotube arrays were co-sensitized by CdTe quantum dots and dye N719.And a solar cell was assembled using this sensitized TiO_2 nanotube array as photo-anode.The quantum dots and the photo-anode were characterized by Uv-vis absorption spectroscopy,fluorescence spectra, X-Ray diffraction and transmission electron microscope.Compared to traditional synthesis of CdTe quantum dots,thiohydracrylic acid served as a stabilizing and reducing agent,which makes the two-step synthesis into the one-step,can simplify the synthesis operation and reduce the poisonous gas release;and microwaveassisted synthesis can make the quantum dots grow faster.With the heating time of microwave becoming longer,the particle size of quantum dots become bigger,and the fluorescence emission and the Uv-vis absorption are shift red.At most the quantum yield can get to 63.6%.The solar cell assembled by CdTe quantum dots and N719 dye co-sensitized TiO_2 nanotube array has the short-circuit current density of3.82mA/cm~2,the open-circuit voltage of 0.518 Vand the fill factor of 0.32.The photon to current conversion efficiency is 0.63%that is higher 152%than the no-sensitized solar cell.
【Fund】: 国家自然科学基金(61264003);; 南宁市科学研究与技术开发计划项目(20145200);; 广西大学科研基金(XBZ120723);; 广西石化资源加工及过程强化技术重点实验室主任课题基金(2012K05)
【CateGory Index】: TB383.1;TM914.4
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