Abstract

The thick N-B co-doped epilayers were grown by the fast sublimation growth method and the depth-resolved carrier lifetimes have been investigated by means of the free-carrier absorption (FCA) decay under perpendicular probe-pump measurement geometry. In some samples, we optically reveal in-grown carbon inclusions and polycrystalline defects of substantial concentration and show that these defects slow down excess carrier lifetime and prevent donor-acceptor pair photo luminescence (DAP PL). A pronounced electron lifetime reduction when injection level approaches the doping level was observed. It is caused by diffusion driven non-radiative recombination. However, the influence of surface recombination is small and insignificant at 300 K.

Details

Title
Carrier Lifetimes and Influence of In-Grown Defects in N-B Co-Doped 6H-SiC
Author
Grivickas, V 1 ; Gulbinas, K 1 ; Jokubavicius, V 2 ; Sun, J W 2 ; Karaliunas, M 1 ; Kamiyama, S 3 ; Linnarsson, M 4 ; Kaiser, M 5 ; Wellmann, P 5 ; Syväjärvi, M 2 

 Institute of Applied Research, Vilnius University, Sauletekio av. 10, Vilnius, 10223 Lithuania 
 Department of Physics, Chemistry and Biology, Linköping University, Linköping, 58183 Sweden 
 Faculty of Science and Technology, Meijo University, Tempaku-ku, Nagoya, 468-8502 Japan 
 School of Information and Communication Technology, Royal Institute of Technology, Kista-Stockholm, 58183 Sweden 
 Department of Materials Science – Materials for Electronics and Energy Technology, University of Erlangen-Nuremberg, Erlangen, 91058 Germany 
Publication year
2014
Publication date
Mar 2014
Publisher
IOP Publishing
ISSN
17578981
e-ISSN
1757899X
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2585058760
Copyright
© 2014. This work is published under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.