Electron-radiation effect on Freon-gas-treated CdTe solar cells

Sangsu Kim, Ju Young Song, Deok Kim, Jinki Hong, Yong H. Kim, Jae Uk Jeong, Mee S. Yoon, Sung Ja Ahn, Taek Keun Nam, Jung Yeol Yeom, Chansun Park, Shinhaeng Cho

Research output: Contribution to journalArticlepeer-review


In this study, CdTe solar cells were fabricated, with 12%-13% efficiencies, using CdCl2 dipping and Freon gas treatments and irradiated with a 6-MeV electron beam of various fluences. The efficiency of the CdCl2-dipped samples decreased by approximately 61% at a dose of 1 × 1016 e/cm2, while that of the Freon-gas-treated samples was reduced by only 43%. The measured external quantum efficiencies indicated that the short-circuit current density (Jsc) values of the treated devices differed significantly under the electron-beam irradiation. The Jsc of the CdCl2-dipped samples decreased from 23.5 to 10.8 mA/cm2, while that of the Freon-gas-treated samples decreased from 24.7 to 16.4 mA/cm2. The drift mobility values, derived through time-of-flight measurements, decreased by approximately 1000 times in the CdCl2-dipped device and by ~100 times in the Freon-gas-treated device at a dose of 1 × 1016 e/cm2. These results reveal that in electron-beam-irradiated devices, the treatment method influences the reduction in Jsc.

Original languageEnglish
Pages (from-to)24120-24129
Number of pages10
JournalInternational Journal of Energy Research
Issue number15
Publication statusPublished - 2022 Dec

Bibliographical note

Funding Information:
Chonnam National University Hwasun Hospital, Grant/Award Number: HCRI20‐001; National Research Foundation of Korea, Grant/Award Numbers: NRF‐2020R1C1C1007296, NRF‐2020R1I1A1A01070761, NRF‐2020R1A2C2007376 Funding information

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean Government (MSIT) (NRF‐2020R1C1C1007296, NRF‐2020R1I1A1A01070761, and NRF‐2020R1A2C2007376) and Chonnam National University, Hwasun Hospital Institute for Biomedical Science (HCRI20‐001).

Publisher Copyright:
© 2022 John Wiley & Sons Ltd.


  • CdCl dipping treatment
  • CdTe solar cells
  • Freon gas treatment
  • electron-beam irradiation
  • high-energy degradation

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology


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