Journal of the Korean Society of Radiology (한국방사선학회논문지)

The Korean Society of Radiology (한국방사선학회)
권호 표지
DOI QR코드

DOI QR Code

Study on the effect of DSSC(Dye Sensitizer Solar Cell) Material on the electrical properties of Mercuric Iodide

염료감응형태양열 물질이 요오드화수은의 전기적 특성에 미치는 영향에 관한 연구

  • Cho, Gyu-Seok (Department of Radiation Instrument, Korea Institute of Radiological and Medical Science) ;
  • Park, Ji-koon (Department of Radiological Science, Korea International University) ;
  • Heo, Seung-Wook (Department of Biomedical Engineering, Inje University) ;
  • Song, Yong-keun (Department of Biomedical Engineering, Inje University) ;
  • Han, Moo-Jae (Department of Biomedical Engineering, Inje University) ;
  • Kim, Kum-Bae (Department of Radiation Instrument, Korea Institute of Radiological and Medical Science) ;
  • Choi, Sang-Hyun (Department of Radiation Instrument, Korea Institute of Radiological and Medical Science)
  • 조규석 (한국원자력의학원 방사선기기부) ;
  • 박지군 (한국국제대학교 방사선학과) ;
  • 허승욱 (인제대학교 의용공학과) ;
  • 송용근 (인제대학교 의용공학과) ;
  • 한무재 (인제대학교 의용공학과) ;
  • 김금배 (한국원자력의학원 방사선기기부) ;
  • 최상현 (한국원자력의학원 방사선기기부)
  • Received : 2017.10.27
  • Accepted : 2017.11.30
  • Published : 2017.11.30
Download PDF
⟨ Previous Next ⟩

Abstract

As a photoconductive material with a high X-ray sensitivity, many researches about mercury iodide has been carried out to substitute for amorphous selenium. However, it has many limitations in commercialization because of the high leakage current. In this study, we fabricated $HgI_2$ unit-cells with mixed silicon oxide($SiO_2$) and titanium oxide($TiO_2$) to reduce a high leakage current and we evaluated an electrical properties of the fabricated unit-cells. As a result, we confirmed that both mixtures were effective in reduing the leakage current of the $HgI_2$ and x-ray sensitivity were significantly increased in fabricated $HgI_2-TiO_2$ unit-cell.

요오드화수은은 우수한 엑스선 민감도 특성을 가진 광도전체로 비정질 셀레늄을 대체할 수 있는 후보물질로 많은 연구가 진행되고 있지만 높은 누설전류로 인해 상용화에 많은 한계점을 나타내고 있다. 본 연구에서는 요오드화수은의 높은 누설전류를 저감하기 위해 요오드화수은에 비해 입자가 작은 이산화규소 및 이산화티타늄을 물리적으로 혼합하여 단위시편을 제작하였으며 제작된 단위시편의 전기적 특성을 비교 분석하였다. 그 결과 혼합한 두 물질 모두 요오드화수은의 높은 누설전류를 저감하는데 효과가 있었으며 요오드화수은-이산화티타늄 혼합물에서는 방사선 민감도 특성이 상당히 높아짐을 확인하였다.

Keywords

References

  1. Paul R. Bennett, Kanai S. Shah, Yuri Dmitriev, "Poly crystalline lead iodide films for digital X-ray sensors," Nuclear instruments and methods in physics research A, Vol. 505, pp. 269-272, 2003. https://doi.org/10.1016/S0168-9002(03)01066-0
  2. Satoshi Tokuda, Hiroyuki Kishihara, Susumu Adachi, "Preparation and characterization of polycrystalline CdZnTe films for large area, high sensitivity X-ray detectors," Journal of materals science, Vol. 15, pp. 1-8, 2004.
  3. R. A. Street, S. E. Ready, K. Van Schuylenbergh, "Comparison of $PbI_{2}$ and $HgI^{2}$ for direct detection active matrix X-ray image sensors" Journal of applied physics, vol. 91, pp. 3345-3355, 2002. https://doi.org/10.1063/1.1436298
  4. M. Schieber, H. Hermon, A. Zuck, A. Vilensky, L. Melekhov, R.Shatunovsky, E. Meerson, Y. Saado, M. Lukach, E. Pinkhasy, S. E. Ready, and R. A. Street, "Thick films of X-ray polycrystalline mercuric iodide detectors," Journal of Crystal Growth, pp. 118, 2001
  5. G. Belev, S. O. Kasap, "Amorphous selenium as an X-ray photoconductor," Journal of Non-crystalline Solids, Vol. 345, pp. 484-488, 2004.
  6. A. M. D. Ede, E. J. Morton and P. DeAntonis, "Thin film CdTe for imaging detector applications," Nuclear instruments and methods in physics research A, Vol. 408, pp. 7-11, 2001.
  7. M. Simon, R.A. Ford, A.R. Franklin, "Analysis of lead oxide PbO layers for direct conversion X-ray detection,"Institute of electrical and electronics engineering, pp. 4268-4272, 2004.