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
Applied Surface Science – Elsevier
Published: Jan 1, 2018
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