Structural study of hydrogenated a-Ge using EXAFS

C. E. Bouldin, E. A. Stern, B. Von Roedern, J. Azoulay

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4 Scopus citations


EXAFS measurements have been made on amorphous germanium, a-Ge, and amorphous germanium with 4.9 and 6 atomic % hydrogen concentration levels as determined by infrared absorption. Assuming that the hydrogen is binding to the internal surfaces of voids in the germanium and comparing the change in the coordination number with the known change in density it is estimated that these voids are ∼30 A ̊ in diameter.

Original languageEnglish
Pages (from-to)105-108
Number of pages4
JournalJournal of Non-Crystalline Solids
Issue number1-2
StatePublished - Jul 1984
Externally publishedYes

Bibliographical note

Funding Information:
In this work we measured the EXAFS of unhydrogenated a-Ge, crystalline Ge, and hydrogenated a-Ge. Comparisons were made to determine the structural changes in a-Ge:H relative to a-Ge and crystalline Ge. The EXAFS signal of a-Ge:H with 4.9 atomic % H as determined by infrared absorption is shown in Research of E.A.S. and Y.A. was supported by N.S.F. grant DMR 80-22221, that of C.E.B. by NASA grant NAGW-199, and that of B.R. by SERI subcontract XW-I-9358-1 of prime contract EG-77-C-01-4042 with the U.S. Department of Energy.


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