We have developed the detached Bridgman process for growth of CdZnTe crystals. Detachment of the solidification
interface from the growth ampoule results in a low density of dislocations in the grown material and large single crystal
grains. The detached Bridgman process also provides for direct control of the melt composition close to the growth front,
allowing for accurate control of both the density of the Te/Cd precipitates as well as the majority carrier concentration in
the grown material. The influence of melt-composition control and compensation by shallow and deep donors on
detector performance is presented.
CdZnTe (CZT) is one of the most promising materials for room-temperature X-ray and Gamma-ray detectors. The
electrical properties of CZT crystal decide the performance of CZT detector to a large degree. For high quality CZT
crystal using as detector, both high resistivity and high carrier transport properties are necessary. In this paper, the
electrical properties and defect levels of Al-doped CZT (CZT:Al) crystal were discussed. Utilizing the thermally
stimulated current (TSC) spectroscope measurement, the defect levels in CZT:Al crystal and their level-model were
determined and inferred. The carrier transport properties of the CZT:Al were charactered with the carrier
mobility-lifetime (μτ) products determined by the peak channel of241Am alpha particle 5.48 MeV spectrum as a function
of the bias voltage. Fitted by the single carrier Hecht equation, the μτ for the electron was evaluated to be 4.6×10-4
cm2·V-1.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
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.