TY  - JOUR
AU  - von den Driesch, Nils
AU  - Stange, Daniela
AU  - Wirths, Stephan
AU  - Rainko, Denis
AU  - Povstugar, Ivan
AU  - Savenko, Aleksei
AU  - Breuer, Uwe
AU  - Geiger, Richard
AU  - Sigg, Hans
AU  - Ikonic, Zoran
AU  - Hartmann, Jean-Michel
AU  - Grützmacher, Detlev
AU  - Mantl, Siegfried
AU  - Buca, Dan Mihai
TI  - SiGeSn Ternaries for Efficient Group IV Heterostructure Light Emitters
JO  - Small
VL  - 13
IS  - 16
SN  - 1613-6810
CY  - Weinheim
PB  - Wiley-VCH
M1  - FZJ-2017-01615
SP  - 1603321
PY  - 2017
AB  - SiGeSn ternaries are grown on Ge-buffered Si wafers incorporating Si or Sn contents of up to 15 at%. The ternaries exhibit layer thicknesses up to 600 nm, while maintaining a high crystalline quality. Tuning of stoichiometry and strain, as shown by means of absorption measurements, allows bandgap engineering in the short-wave infrared range of up to about 2.6 µm. Temperature-dependent photoluminescence experiments indicate ternaries near the indirect-to-direct bandgap transition, proving their potential for ternary-based light emitters in the aforementioned optical range. The ternaries' layer relaxation is also monitored to explore their use as strain-relaxed buffers, since they are of interest not only for light emitting diodes investigated in this paper but also for many other optoelectronic and electronic applications. In particular, the authors have epitaxially grown a GeSn/SiGeSn multiquantum well heterostructure, which employs SiGeSn as barrier material to efficiently confine carriers in GeSn wells. Strong room temperature light emission from fabricated light emitting diodes proves the high potential of this heterostructure approach.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000399455900004
C6  - pmid:28160408
DO  - DOI:10.1002/smll.201603321
UR  - https://juser.fz-juelich.de/record/827490
ER  -