Material and detector properties of cadmium manganese telluride (Cd_1-xMn_xTe) crystals grown by the modified floating-zone method

Journal Article · Wed Dec 24 00:00:00 EST 2014 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI:https://doi.org/10.1016/j.nima.2014.12.060· OSTI ID:1213374

Hossain, A. ^[1]; Gu, G. D. ^[1]; Bolotnikov, A. E. ^[1]; Camarda, G. S. ^[1]; Cui, Y. ^[1]; Roy, U. N. ^[1]; Yang, G. ^[1]; Liu, T. ^[1]; Zhong, R. ^[1]; Schneelock, J. ^[1]; James, R. B. ^[1]

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1. Brookhaven National Lab. (BNL), Upton, NY (United States)

We demonstrated the material- and radiation-detection properties of cadmium manganese telluride (Cd_1-xMn_xTe; x=0.06), a wide-band-gap semiconductor crystal grown by the modified floating-zone method. We investigated the presence of various bulk defects, such as Te inclusions, twins, and dislocations of several as-grown indium-doped Cd_1-xMn_xTe crystals using different techniques, viz., IR transmission microscopy, and chemical etching. We then fabricated four planar detectors from selected CdMnTe crystals, characterized their electrical properties, and tested their performance as room-temperature X- and gamma-ray detectors. Thus, our experimental results show that CMT crystals grown by the modified floating zone method apparently are free from Te inclusions. However, we still need to optimize our growth parameters to attain high-resistivity, large-volume single-crystal CdMnTe.

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Office of Nonproliferation and Verification Research and Development (NA-22); USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation
• Grant/Contract Number: SC00112704
• OSTI ID: 1213374
• Alternate ID(s): OSTI ID: 1246249
• Report Number(s): BNL-108251-2015-JA; NN2001000
• Journal Information: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 784, Issue C; Conference: Symposium on Radiation Measurements and Applications 2014 (SORMA XV), 9-12 June 2014; ISSN 0168-9002
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CdMnTe
Te inclusions
dislocations
IR transmission
spectral response
mobility-lifetime product