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Investigation of PbI2 film fabricated by a new sedimentation method as an x-ray conversion material

Title
Investigation of PbI2 film fabricated by a new sedimentation method as an x-ray conversion material
Authors
Yun M.-S.Cho S.-H.Lee R.Jang G.-W.Kim Y.-S.Shin W.-J.Nam S.-H.
Ewha Authors
이레나
SCOPUS Author ID
이레나scopus
Issue Date
2010
Journal Title
Japanese Journal of Applied Physics
ISSN
0021-4922JCR Link
Citation
vol. 49, no. 4 PART 1, pp. 418011 - 418014
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Radiation detectors are currently fabricated by a screen-print method at room temperature. However, this method has many disadvantages in terms of thickness control and electron trapping. We fabricated polycrystalline PbI 2 films by a new sedimentation method and compared the results with those obtained by the existing screen-print (SP) method. We investigated the electrical and structural properties of the films. We fabricated 2 × 2 cm2 sample films with a thickness of about 200 mm. A field emission scanning electron microscopy (FE-SEM) analysis showed that these films were of higher density than those fabricated by a conventional SP method. We also measured the photosensitivity and dark current of the films. The photosensitivity of the films fabricated by the new sedimentation method was 4.8 pC/(mRdot;mm2), and the dark current was 2.2 pA/mm2 at 1.0 V/mm. The linearity of the film ranged from 3 to 12 mAs, which is promising for diagnostic radiography. © 2010 The Japan Society of Applied Physics.
DOI
10.1143/JJAP.49.041801
Appears in Collections:
의학전문대학원 > 의학과 > Journal papers
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