요오드화수은은 우수한 엑스선 민감도 특성을 가진 광도전체로 비정질 셀레늄을 대체할 수 있는 후보물 질로 많은 연구가 진행되고 있지만 높은 누설전류로 인해 상용화에 많은 한계점을 나타내고 있다. 본 연구 에서는 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.

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 HgI2 unit-cells with mixed silicon oxide(SiO2) and titanium oxide(TiO2) 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 HgI2 and x-ray sensitivity were significantly increased in fabricated HgI2-TiO2 unit-cell.

ABSTRACT
 Ⅰ. INTRODUCTION
 Ⅱ. MATERIAL AND METHODS
  1. Fabrication of the digital X-ray detector unti-cell
  2. Evaluation of the fabricated digital X-raydetector unti-cell
 Ⅲ. RESULT AND DISCUSSION
 Ⅳ. CONCLUSION
 Reference
 요 약

• Gyu-Seok Cho(Department of Radiation Instrument, Korea Institute of Radiological and Medical Science) | 조규석
• Ji-koon Park(Department of Radiological Science, Korea International University) | 박지군
• Seung-Wook Heo(Department of Biomedical Engineering, Inje University) | 허승욱
• Yong-keun Song(Department of Biomedical Engineering, Inje University) | 송용근
• Moo-Jae Han(Department of Biomedical Engineering, Inje University) | 한무재
• Kum-Bae Kim(Department of Radiation Instrument, Korea Institute of Radiological and Medical Science) | 김금배
• Sang-Hyun Choi(Department of Radiation Instrument, Korea Institute of Radiological and Medical Science) | 최상현 교신저자