TY  - JOUR
AU  - Ahl, J.-P.
AU  - Hertkorn, J.
AU  - Koch, H
AU  - Galler, B.
AU  - Michel, B.
AU  - Binder, M.
AU  - Holländer, B.
TI  - Morphology, growth mode and indium incorporation of MOVPE grown InGaN and AlInGaN: A comparison
JO  - Journal of crystal growth
VL  - 398
SN  - 0022-0248
CY  - Amsterdam [u.a.]
PB  - Elsevier
M1  - FZJ-2015-02802
SP  - 33 - 39
PY  - 2014
AB  - We compared InGaN- and AlInGaN-layers grown by metal-organic vapor phase epitaxy (MOVPE) in terms of morphology, growth mode and indium incorporation. The growth parameters of the AlInGaN layers only differed from InGaN growth by an additional trimethylaluminum (TMAl) flow. Rutherford backscattering spectrometry (RBS) and X-ray photoelectron spectroscopy (XPS) measurements showed that the indium incorporation in AlInGaN was significantly increased compared to InGaN. Atomic force microscopy (AFM) was used to analyze the morphology and the growth mode. The additional TMAl flow changed the growth mode from a step-flow mode to a 2-dimensional (2D) island nucleation mode, yielding a smoother layer morphology. This behavior can be explained by the low surface mobility of the Al adatoms and their nucleation on terraces between adjacent steps. Step bunching – as observed for InGaN – was avoided during AlInGaN growth. This reduced the AFM root mean square roughness by 40% compared to InGaN. Possible impacts on charge carrier localization in QWs are discussed.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000336430900006
DO  - DOI:10.1016/j.jcrysgro.2014.03.043
UR  - https://juser.fz-juelich.de/record/189772
ER  -