D
Dmitri Kovalev
Researcher at Technische Universität München
Publications - 72
Citations - 4250
Dmitri Kovalev is an academic researcher from Technische Universität München. The author has contributed to research in topics: Photoluminescence & Silicon. The author has an hindex of 33, co-authored 71 publications receiving 4135 citations. Previous affiliations of Dmitri Kovalev include University of Bath.
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Journal ArticleDOI
Optical Properties of Si Nanocrystals
Journal ArticleDOI
Breakdown of the k -Conservation Rule in Si Nanocrystals
TL;DR: In this article, light emission from different systems of silicon nanocrystals does behave as expected for indirect-band-gap quantum dots, and the ratio of no-phonon transitions to TA and TO phonon-assisted processes over a wide range of confinement energies is determined.
Journal ArticleDOI
Ordering and Self-organization in Nanocrystalline Silicon
G. F. Grom,David J. Lockwood,John P. McCaffrey,H. J. Labbé,Philippe M. Fauchet,Bruce E. White,J. Diener,Dmitri Kovalev,F. Koch,Leonid Tsybeskov +9 more
TL;DR: Self-organization of Si nanocrystals larger than 80 Å into brick-shaped crystallites oriented along the 〈111〉 crystallographic direction is reported, which should aid the development of maskless, reproducible Si nanofabrication techniques.
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Properties of the yellow luminescence in undoped GaN epitaxial layers
D.M. Hofmann,Dmitri Kovalev,G. Steude,Bruno K. Meyer,Axel Hoffmann,L. Eckey,R. Heitz,T Detchprom,Hiroshi Amano,Isamu Akasaki +9 more
TL;DR: In this article, a recombination model involving shallow donors and deep donors of probably intrinsic origin was proposed to study the 2.2 eV emission in undoped GaN epitaxial layers.
Journal ArticleDOI
Silicon Nanocrystals: Photosensitizers for Oxygen Molecules
Dmitri Kovalev,Minoru Fujii +1 more
TL;DR: In this article, the interaction between O 2 and silicon nanocrystals was explored, which can be employed in the photosynthesis of singlet oxygen, and it was shown that nanoscale Si has entirely new properties owing to morphological and quantum size effects, i.e., large accessible surface areas and excitons of variable energies.