Laser-induced surface recrystallization of polycrystalline PbI2 thick films for X-ray detector application

Laser-induced surface recrystallization of polycrystalline PbI2 thick films for X-ray detector... Article history: In this work, laser-induced surface recrystallization process was developed to improve the surface prop- Received 2 May 2017 erties and device performance of the polycrystalline PbI thick films prepared by using close space Received in revised form 21 August 2017 vapor deposition method. A continuous polycrystalline PbI recrystallized layer with a better mechanical Accepted 23 August 2017 strength and reflectivity improved from 2% to 4%–6% was obtained by this recrystallization process for Available online 26 August 2017 the films with mechanical pretreatment. Other polytypes is absent in the recrystallized layer with the 2H- polytype remaining before and after treatment and obtaining improved electrical and X-ray photoelectric Keywords: response performance. The pretreatment such as mechanical cutting/polishing and hydrogenation is nec- PbI2 film essary to lower the non-wetting crystallization behavior during the recrystallization process due to the Nd:YAG laser rough surface state and oxygen contamination. Surface recrystallization © 2017 Elsevier B.V. All rights reserved. Surface treatment 1. Introduction would lead to discontinuous electrode layer and structure insta- bility. It is thought that the laser-induced surface recrystallization Polycrystalline lead iodide (PbI ) thick film is considered to be a is an alternative process to further improve the surface smooth- promising http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Surface Science Elsevier

Laser-induced surface recrystallization of polycrystalline PbI2 thick films for X-ray detector application

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Publisher
Elsevier
Copyright
Copyright © 2017 Elsevier B.V.
ISSN
0169-4332
eISSN
1873-5584
D.O.I.
10.1016/j.apsusc.2017.08.144
Publisher site
See Article on Publisher Site

Abstract

Article history: In this work, laser-induced surface recrystallization process was developed to improve the surface prop- Received 2 May 2017 erties and device performance of the polycrystalline PbI thick films prepared by using close space Received in revised form 21 August 2017 vapor deposition method. A continuous polycrystalline PbI recrystallized layer with a better mechanical Accepted 23 August 2017 strength and reflectivity improved from 2% to 4%–6% was obtained by this recrystallization process for Available online 26 August 2017 the films with mechanical pretreatment. Other polytypes is absent in the recrystallized layer with the 2H- polytype remaining before and after treatment and obtaining improved electrical and X-ray photoelectric Keywords: response performance. The pretreatment such as mechanical cutting/polishing and hydrogenation is nec- PbI2 film essary to lower the non-wetting crystallization behavior during the recrystallization process due to the Nd:YAG laser rough surface state and oxygen contamination. Surface recrystallization © 2017 Elsevier B.V. All rights reserved. Surface treatment 1. Introduction would lead to discontinuous electrode layer and structure insta- bility. It is thought that the laser-induced surface recrystallization Polycrystalline lead iodide (PbI ) thick film is considered to be a is an alternative process to further improve the surface smooth- promising

Journal

Applied Surface ScienceElsevier

Published: Jan 1, 2018

References

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