Prismatic punching defects in CdTe compounds
- Authors
- Kim, K. H.; Bolotnikov, A. E.; Camarda, G. S.; Franc, J.; Fochuk, P.; James, R. B.
- Issue Date
- 15-3월-2014
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Defects; Bridgman technique; Cadmium compounds; Semiconducting II-VI materials
- Citation
- JOURNAL OF CRYSTAL GROWTH, v.390, pp.1 - 4
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF CRYSTAL GROWTH
- Volume
- 390
- Start Page
- 1
- End Page
- 4
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/99014
- DOI
- 10.1016/j.jcrysgro.2013.12.015
- ISSN
- 0022-0248
- Abstract
- The origin and nature of star-shaped prismatic punching defects (PPDs) were analyzed by white-beam X-ray diffraction topography (WBXDT) and photoluminescence (PL) measurements. PPDs were observed in CdTe-based compounds that had Te-rich secondary phase defects and were annealed only under Cd overpressure. The evolutional features of the PPDs during annealing were similar to those of a diffusion process, that is, the in-diffusion of Cd vapor via Cd vacancies. PL mapping around the PPDs reveals that the stoichiometry of PPDs is the same as that of a normal matrix, and that PPDs are just structural defects with non-radiative emission induced by the exothermic reaction between Cd and Te. We find that Te-rich secondary phase defects can be removed without the generation of star-shaped PPDs, if the exothermic reaction rate can be slowed down to reduce the thermal gradient between the Te-rich region and the surrounding matrix. (C) 2013 Elsevier B.V. All rights reserved
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Health Sciences > School of Health and Environmental Science > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.