PROJECT DETAILS
Name: Utilization of specific properties of rare earths in preparation of InP based radiation detector structures
Sponsor: Grant Agency of the Czech Republic
Principal investigator: Olga Procházková, Ph.D.
Co-principal investigator: Ladislav Pekárek, MSc.
Member: P. Boháček; Jan Grym, Ph.D.; Marie Hamplová, MSc.; Zdeněk Jarchovský, MSc.; Zdislava Podvalová, MSc.; V. Studnička; Fedor Šrobár, DSc.; Jiří Zavadil, Ph.D.; Karel Žďánský, Ph.D.
From: 2006-01-01
To: 2008-12-31
The aim of the project proposal is the utilization of InP epitaxial layers prepared with the addition of rare earths into the growth melt for the detection of ionizing radiation. This novel approach, in the context of radiation detection, enables to prepare pure, undoped p-type InP layers and generates knowledge relevant for both the basic research and applications. Two types of detector structures will be prepared and investigated: A) Structures for X- and γ- ray detection, based on bulk semi-insulating (SI) InP material with a thin p-type InP contact layer. SI-InP bulk crystals will be prepared by Czochralski method with various dopants and regimes of temperature annealing and the contact p-InP layer will be grown by liquid phase epitaxial (LPE) growth. B) Structures on the base of p-type InP for α- particle and soft X- ray detection. P-type InP layers with thickness exceeding 10 μm and impurity concentrations below 1015 cm-3 will be prepared by LPE on n-type InP Czochralski grown substrate. Suitable metal contacts will be formed by vacuum evaporation for both types of structures. Prepared materials and structures will be investigated by the following diagnostic methods: SEM – structure, low temperature photoluminescence spectroscopy – optical properties, temperature dependent Hall effect, DLTS, C-V measurement by Hg probe – electrical properties and detection spectra of α- particles, X- and γ- rays from 241Am and other radioactive sources by multi-channel analyser – detection properties.