Objective CdTe and CdZnTe are the most promising semiconductor materials for substrates in IR detectors, X-ray and g-ray detectors for medical and industrial applications and nuclear radiation monitoring. These applications require large semi-insulating single crystals. To prepare such materials, a strict in situ composition control of the growing crystal is of primary importance, since the properties of II-VI materials are known to be strongly dependent on the non-stoichiometry of the crystal. This project is aimed at bringing about fundamental understanding of the relationship between stoichiometry and properties of II-VI materials CdTe and CdZnTe and, on this basis, to create crystal growth technologies capable of producing materials with the highest achievable properties to be utilized in devices.Two crystal growth technologies are proposed to be developed: growth from the vapour phase by Modified Markov Technique and from melt, by Horizontal Bridgman. The characteristic feature of this project is that it is based on vapour pressure scanning (VPS) - a new method, which proved to be able to determine the composition of the crystalline phase with an unparalleled accuracy of 10-4 - 10-5 at. directly at high temperature. Hence, VPS makes it possible to grow crystals with preliminary fixed and precisely in situ controlled stoichiometry.The prepared materials will be fully characterized and tested in nuclear radiation detectors. The project will be completed by recommendations for up scaling the experimental equipment for industrial applications. Programme(s) IC-INTAS - International Association for the promotion of cooperation with scientists from the independent states of the former Soviet Union (INTAS), 1993- Topic(s) 3 - Chemistry OPEN - OPEN Call Call for proposal Data not available Funding Scheme Data not available Coordinator Albert-Ludwigs-Universität Freiburg EU contribution No data Address Hebelstrasse 25 79104 Freiburg Germany See on map Total cost No data Participants (4) Sort alphabetically Sort by EU Contribution Expand all Collapse all Hebrew University of Jerusalem Israel EU contribution No data Address 91904 Jerusalem See on map Total cost No data Russian Academy of Sciences Russia EU contribution No data Address Politekhnicheskaya 26 194021 St. Petersburg See on map Total cost No data Russian Academy of Sciences Russia EU contribution No data Address Leninsky prospect, 31 117907 Moscow See on map Total cost No data Siberian branch of Russian Academy of Sciences Russia EU contribution No data Address 3 Acad. Lavrentiev prospekt 630090 Novosibirsk See on map Total cost No data
