Volume 14 Issue 1
Jan.  2021
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Chinese Optics  > 2021  >  14(1): 163-169.
WANG Jia-tong, HUANG Qi-zhang, GAO Jian-qiao, MA Yue, XING Xiao-xue, ZHANG Yu. Size and temperature dependence of spectral transmittance for CdSe colloidal quantum dot film filters[J]. Chinese Optics, 2021, 14(1): 163-169. doi: 10.37188/CO.2020-0198
Citation: WANG Jia-tong, HUANG Qi-zhang, GAO Jian-qiao, MA Yue, XING Xiao-xue, ZHANG Yu. Size and temperature dependence of spectral transmittance for CdSe colloidal quantum dot film filters[J]. Chinese Optics, 2021, 14(1): 163-169. doi: 10.37188/CO.2020-0198
shu

Size and temperature dependence of spectral transmittance for CdSe colloidal quantum dot film filters

  • 1.

    College of Electronic Science and Engineering, Jilin University, Changchun 130012, China

  • 2.

    College of Electronic Information Engineering, Changchun University, Changchun 130022, China

Funds:  Outstanding Youth Fund of the National Natural Science Foundation of China (No. 61722504); Key R&D Program Project of the Ministry of Science and Technology (No. 2017YFB0403601); General Project of National Natural Science Foundation of China (No. 61675086); National Natural Science Foundation of China (No. 61850021)
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  • Corresponding author: xiaoxue8184@126.com; yuzhang@jlu.edu.cn
  • Received Date: 10 Nov 2020
  • Rev Recd Date: 30 Nov 2020
    • Available Online: 08 Jan 2021
  • Publish Date: 25 Jan 2021
    Abstract
  • In order to reduce the size of spectrometers and make it suitable for military satellites and other fields, we used colloidal quantum dots as filter materials to study the optical properties of CdSe colloidal quantum dot filters. The high-quality CdSe colloidal quantum dots were synthesized by an organic phase reaction method and prepared into CdSe colloidal quantum dots thin film filters after p-phenylenediamine extinction treatment. The Transmission Electron Microscope (TEM) was used to characterize the morphology and particle size of the as-prepared samples. The UV-visible absorption and UV-visible transmittance were measured at different temperatures. The results indicated that the increase in particle size caused both absorption and transmittance to increase for CdSe colloidal quantum dots thin film filters at room temperature. Under a given particle size, the absorption and transmittance of the first exciton absorption peak red shifted with the rise in temperature. The red shift of absorption curve of CdSe colloidal quantum dots thin film filters did not exceed 1nm per 10 K temperature rising and the half-width increased. In addition, the stability and tunable characteristics of the CdSe colloidal quantum dots thin film filters have been verified through repeated experiments, and it is suitable as a cut-off filter. Therefore, CdSe colloidal quantum dots thin film filters have high value in micro-spectrometers.

     

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