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Proceedings Paper

Preparation of low-dislocation density and semi-insulating InP using LEC technique
Author(s): V. Jagadeesh Kumar; P. Ramasamy; R. Fornari
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Paper Abstract

Indium Phosphide is a semiconductor which is very useful for applications in the field of micro and optoelectronics. Growth of InP bulk sin9le crystals by Liquid Encapsulation Czochralski (LEC) is stil a major problem of scientific and technological importance. The lack of a suitable dopant to reduce the EPD without enhancing the number of free carrier concentration has been eliminated by the addition of codopants, namely Cadmium and Sulpihur. In the present work, it will be shown that it is possible to obtain LEC boules having n-type conductivity over the entire crystal length with a distribution of carriers more homogeneous than in crystals doped, for instance with sulphur alone. The doping procedure adopted leads to a good evaluation of the segregation coefficient of Cadmium in InP. The coefficients reported in the literature are so scattered that it is difficult to set accurately the amount of dopant to be added for obtdining the desired doping level. A variety of dopants have been made use of to understand the nature of dopants and their role in the structural and electrical characteristics of the crystal.

Paper Details

Date Published: 16 December 1992
PDF: 5 pages
Proc. SPIE 1622, Emerging Optoelectronic Technologies, (16 December 1992); doi: 10.1117/12.636970
Show Author Affiliations
V. Jagadeesh Kumar, Anna Univ. (India)
P. Ramasamy, Anna Univ. (India)
R. Fornari, MASPEC/CNR (Italy)

Published in SPIE Proceedings Vol. 1622:
Emerging Optoelectronic Technologies
Krishna Shenai; Ananth Selvarajan; C. Kumar N. Patel; C. N. R. Rao; B. S. Sonde; Vijai K. Tripathi, Editor(s)

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