Abstract Single crystals of binary III-V-semiconductors, e.g. GaAs or InP, are important basic materials for optoelectronic devices, e.g. LED's and lasers. Device production needs highly perfect substrate crystals with low defect densities and homogeneous dopant distributions. In our experiment we applied the Travelling-Heater-Method to grow the III-V compound GaSb. The aim of this research project was to improve the crystal quality by investigating convective transport phenomena and the origins of dopant inhomogeneities under earth and space conditions. Earth grown crystals show strong dopant variations mainly due to convective flow phenomena. The preliminary result of our SPACELAB 1 experiment reveals an increase of dopant homogeneity in the space grown crystal because of the absence of natural convection under reduced gravity.


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    Title :

    Travelling heater growth of GaSb under reduced gravity during the first spacelab-mission


    Contributors:
    Nagel, G. (author) / Benz, K.W. (author)

    Published in:

    Publication date :

    1984-01-01


    Size :

    4 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    The First Spacelab Mission

    Craft, H. | NTRS | 1984


    The first Spacelab mission

    PACE, JR., R. | AIAA | 1976


    The first Spacelab mission

    Pace, R. E., Jr. | NTRS | 1976


    The First Spacelab Mission

    Craft, Harry | SPIE | 1984