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@ARTICLE{Frauenrath:1023073,
author = {Frauenrath, M. and Concepción Díaz, Omar and Gauthier, N.
and Nolot, E. and Buca, D. and Hartmann, J.-M.},
title = {{A}dvances in {I}n {S}itu {B}oron and {P}hosphorous
{D}oping of {S}i{G}e{S}n},
journal = {ECS journal of solid state science and technology},
volume = {12},
number = {6},
issn = {2162-8769},
address = {Pennington, NJ},
publisher = {ECS},
reportid = {FZJ-2024-01646},
pages = {064001 -},
year = {2023},
abstract = {Dopant concentrations higher than 1 × 1019 cm−3 are
required to improve the performances of various GeSn based
devices such as photodetectors, electrically pumped lasers
and so on. In this study, the in situ Boron and Phosphorous
doping of SiGeSn was investigated, building upon recent
studies on in situ B or P doped GeSn. The surfaces of
intrinsic and lowly doped pseudomorphic SiGeSn layers were
rough. By contrast, a 〈110〉 cross hatch was recovered
and surfaces as smooth as the Ge Strain-Relaxed Buffers
underneath were obtained for the highest B2H6 or PH3
mass-flows. The surface Root Mean Square roughness and
Zrange values were then as low as 0.36 nm and 2.86 nm for
SiGeSn:B, and 0.47 nm and 4.60 nm for SiGeSn:P. In addition,
Si contents as high as $25\%$ were obtained, notably in
SiGeSn:B layers. Dopants were almost fully electrically
active in those SiGeSn:B and SiGeSn:P layers, with carrier
concentrations as high as 2.0 × 1020 cm−3 and 2.7 × 1020
cm−3, respectively. For SiGeSn:P, the shortcoming of in
situ doped GeSn:P was overcome, that is the formation of
electrically inactive SnmPnV clusters for high PH3
mass-flows. Such electrically active carrier concentrations
will be beneficial for (Si)GeSn based devices, but also for
all Group-IV based devices with extremely low thermal budget
constraints.},
cin = {PGI-9},
ddc = {660},
cid = {I:(DE-Juel1)PGI-9-20110106},
pnm = {5234 - Emerging NC Architectures (POF4-523)},
pid = {G:(DE-HGF)POF4-5234},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000999127900001},
doi = {10.1149/2162-8777/acd720},
url = {https://juser.fz-juelich.de/record/1023073},
}