Distribution of components in Ge-Si bulk single crystals grown under the continuous feeding of the melt with the second component (Si)

AZHDAROV G., Kucukomeroglu T., VARILCI A., ALTUNBAS M., KOBYA A. İ., AZHDAROV P.

JOURNAL OF CRYSTAL GROWTH, cilt.226, sa.4, ss.437-442, 2001 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 226 Sayı: 4
  • Basım Tarihi: 2001
  • Doi Numarası: 10.1016/s0022-0248(01)01270-2
  • Dergi Adı: JOURNAL OF CRYSTAL GROWTH
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.437-442
  • Anahtar Kelimeler: segregation, supply of solute elements, double crucible technique, growth from melt, single crystal growth, germanium silicon alloys, FLOAT-ZONE TECHNIQUE, CZOCHRALSKI GROWTH, ALLOY CRYSTALS, RICH, BRIDGMAN
  • Karadeniz Teknik Üniversitesi Adresli: Evet

Özet

A component distribution in Ge-rich Ge-Si single crystals grown under the continuous feeding of the melt with the second component (Si) has been analyzed theoretically and investigated experimentally with a view to establish the operational parameters and optimum processing conditions in preparing bulk crystals with a desired uniform and/or graded composition profiles. It was found that a numerical model can be successfully applied for estimating the macroscopic axial composition profiles in Ge-rich Ge-Si single crystals. A modified double crucible method was developed to grow graded and uniform Ge-Si bulk single crystals using the continuous feeding of the melt with a Si rod. The method for the growth of compositionally graded and uniform Ge-Si bulk single crystals from a starting pure Ge melt using a Ge seed followed with continuous feeding of the melt with a Si rod was used and considered. Two stages of the feeding rate of the melt were developed to increase a uniform portion of the crystals grown by this method. We were successful in growing compositionally graded and uniform Ge-Si single crystals with Si content up to 15 at% using theoretically established operational parameters (growth and feeding rates: a starting melt composition). The length and diameter of the crystals are 30-70 and 5-9 mm, respectively. (C) 2001 Elsevier Science B.V. All rights reserved.