| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5489443 | Journal of Crystal Growth | 2017 | 19 Pages |
Abstract
Wire on Well (WoW) structure embedded in a matrix is naturally formed by growing InxGa1âxAs/GaAs1âyPy strained multiple quantum wells (MQW) on vicinal substrates and employing triethylgallium (TEGa) as a precursor in low-temperature MOVPE. The structure is useful for the subcell in current-matched mult-junction solar cells with lattice-matched materials because of its ability of band-gap tuning. In this research, high density and uniform In0.30Ga0.70As/GaAs0.6P0.4 WoW was obtained up to 200 stacks and its structure was analyzed by X-ray diffraction reciprocal space mapping, atomic force microscopy and scanning transmission electron microscopy. The structure of the wire can be controlled by changing the equivalent layer thicknesses of In0.30Ga0.70As and GaAs0.6P0.4. The photoluminescence peak from the WoW shifted according to the size of InGaAs wires and the intensity was dependent on the accumulation of lattice-mismatch stress.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Hirofumi Cho, Kasidit Toprasertpong, Hassanet Sodabanlu, Kentaroh Watanabe, Masakazu Sugiyama, Yoshiaki Nakano,