Journal of Guangxi Normal University(Natural Science Edition) ›› 2017, Vol. 35 ›› Issue (3): 104-110.doi: 10.16088/j.issn.1001-6600.2017.03.013

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Microwave-assisted Synthesis of CdTe Quantum Dotsand Application on Dye-sensitized Solar Cell

LAN Yuwei1,2*, YI Qilei1, HUANG Yantao1, LIU Jinling1, TAN Yanfang1   

  1. 1. School of Chemistry and Chemical Engineering, Guangxi University, Nanning Guangxi 530004, China;
    2. Guangxi KeyLaboratory of Petrochemical Resource Processing and Process Intensification Technology, Nanning Guangxi 530004, China
  • Online:2017-07-25 Published:2018-07-25

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Abstract: High-quality CdTe quantum dots were synthesized by microwave-assisted method with CdCl2 and Na2TeO3 as reactants and thiohydracrylic acid as a reducing and stabilizing agent. TiO2 nanotube arrays were co-sensitized by CdTe quantum dots and dye N719. And a solar cell was assembled using this sensitized TiO2 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 microwave-assisted 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 TiO2 nanotube array has the short-circuit current density of 3.82 mA/cm2, the open-circuit voltage of 0.518 V and 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.

Key words: microwave-assisted, CdTe quantum dots, dye sensitized solar cell

CLC Number: 

  • O644
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