Distribution of components in Ge-Si bulk single crystals grown under the continuous feeding of the melt with the second component (Si)
JOURNAL OF CRYSTAL GROWTH, cilt.226, sa.4, ss.437-442, 2001 (SCI-Expanded, Scopus)
- 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.