Growth Of CdTe Crystals By The Heat Exchanger Method (HEMN)

C. P. Khattak; F. Schmid

doi:10.1117/12.960628

12 September 1989 Growth Of CdTe Crystals By The Heat Exchanger Method (HEMN)

C. P. Khattak, F. Schmid

Proceedings Volume 1106, Future Infrared Detector Materials; (1989) https://doi.org/10.1117/12.960628
Event: SPIE 1989 Technical Symposium on Aerospace Sensing, 1989, Orlando, FL, United States

Abstract

The poor thermal conductivity of CdTe has prevented controlled directional solidification and, therefore, completely single crystal growth is not achieved on a routine basis. The Heat Exchanger Method (HE(TM)) has been adapted for the growth of 600 g, 5.5 cm diameter and 1300 g, 7.5 cm diameter CdTe ingots. Emphasis was placed on achieving controlled directional solidification. Unseeded crystal growth was carried out using presynthesized CdTe as meltstock and without the use of a separate Cd or Te reservoir to control stoichiometry. It was demonstrated that only two grains were formed and the structure was maintained during growth. Twinning was minimized and large twin-free samples could be obtained. The EPD values of CdTe were in the range of 103 to 5x105/cm2. Most of the material was p-type, but CdTe with 105 ohm-cm resistivity was grown. An absorption coefficient as low as 0.07/cm was measured showing that the crystals were suitable for CO2 laser modulator applications.

Citation Download Citation

C. P. Khattak and F. Schmid "Growth Of CdTe Crystals By The Heat Exchanger Method (HEMN)", Proc. SPIE 1106, Future Infrared Detector Materials, (12 September 1989); https://doi.org/10.1117/12.960628

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available