PAM XIAMEN is comparable to the UK IQE to build Asian VCSEL epitaxial core supply chain Xiamen Powerway focuses on high-end compound semiconductor epitaxial R&D and manufacturing. In 2018, the 4-inch and 6-inch VCSELs were mass-produced and entered the mainstream chip manufacturers in Taiwan. Utilizing state-of-the-art MBE (Molecular Epitaxial Beam Epitaxy) [...]
GaAs pn diodes with heavily carbon-doped p-type GaAs grown by MOMBE were fabricated. The I-V and C-V characteristics were not significantly affected by the hole concentration of the p-GaAs although a lattice mismatch at the junction generates misfit dislocations. A good I-V characteristic with the ideality factor of 1.3 [...]
This study presents a new ultrathin SiC structure prepared by a catalyst free carbothermal method and post-sonication process. We have found that merging ultra-light 3D graphene foam and SiO together at high temperature leads to the formation of a complex SiC structure consisting of 3D SiC foam covered with [...]
The n-type silicon integrated-back contact (IBC) solar cell has attracted much attention due to its high efficiency, whereas its performance is very sensitive to the wafer of low quality or the contamination during high temperature fabrication processing, which leads to low bulk lifetime τbulk. In order to clarify the [...]
The electrical characteristics of GaN p–n junctions grown on freestanding GaN substrates by metal–organic chemical vapor deposition were investigated. The current–voltage (I–V) characteristics of the GaN p–n diode showed relatively low values and, little temperature dependence of the reverse leakage current. The breakdown voltage of the GaN p–n diode [...]
Newly engineered substrates consisting of semiconductor-on-insulator are gaining much attention as starting materials for the subsequent transfer of semiconductor nanomembranes via selective etching of the insulating layer. Germanium-on-insulator substrates are critically important because of the versatile applications of Ge nanomembranes (Ge NMs) toward electronic and optoelectronic devices. Among various [...]
The hexagonal wurtzite GaN nanowires embedded in the nanochannels of anodic alumina membrane were achieved by the direct reaction of Ga vapour with a constant flowing ammonia atmosphere. X-ray diffraction (XRD), scanning electron microscopy and transmission electron microscopy were used to measure the size and structures of the samples. [...]
Lattice bending in LEC-grown semi-insulating GaAs crystal wafers was investigated by X-ray diffraction. Various distributions in the lattice bending were observed in wafers from different boules. Prominent bends, with radii of curvature of about 20 m, were observed at places where the relevant topographs showed the presence of fine [...]
Silicon wafers contribute significantly to the photovoltaic module cost. Kerfless silicon wafers that grow epitaxially on porous silicon (PSI) and are subsequently detached from the growth substrate are a promising lower cost drop-in replacement for standard Czochralski (Cz) wafers. However, a wide technological processing window appears to be a [...]
The quasi-steady state photo conductance technique is employed to probe effective minority carrier lifetime (τ eff) modifications after integrating silver nanoparticles (Ag NPs) on n-type and p-type silicon wafers with a native oxide surface. Our observations reveal that τ eff modification is very sensitive to Ag NPs size, surface [...]
