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Article
Short period p-type AlN/AlGaN superlattices for deep UV light emitters.
The Mg doped AlN/AlxGa1-xN (0.03 ≤ x ≤ 0.05) short period superlattices (SPSLs) were grown by gas source molecular beam epitaxy on (0001) sapphire substrates. The average AlN mole fraction is ∼ 0.7 and the hole c...
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Article
Effect of Hydrogen Dilution on Structure and Electronic Properties of Ge:H and GeYSi1-Y Films Deposited by Low Frequency Plasma
We report on a systematic study of growth rate, surface morphology, hydrogen and oxygen incorporation, optical and electrical properties in Ge:H and GeYSi1-Y:H, Y> 0.85 films, deposited in a capacitive reactor by...
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Article
Mechano-chemical Synthesis, Deposition and Structural Characterization of CIGS
CuInGaSe2 (CIGS) is a prominent thin-film photovoltaic material. However, commonly used physical vapour deposition and sputtering techniques used to fabricate CIGS thin-film photovoltaic (PV) devices are complex ...
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Article
Low Resistance Ohmic Contacts Formation and Mechanism of Current Transport Through p-GaN and p-AlGaN
We report the influence of surface treatment, annealing temperature and metal bilayer thickness on the specific contact resistance (ρc) of Au/Ni ohmic contacts to p-GaN and p-AlGaN. Ohmic contact on p-GaN...
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Article
Silicon-germanium films deposited by low-frequency plasma-enhanced chemical vapor deposition: Effect of H2 and Ar dilution
We have studied structure and electrical properties of Si1−YGeY:H films deposited by low-frequency plasma-enhanced chemical vapor deposition over the entire composition range from Y = 0 to Y = 1. The deposition r...
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Article
Gas source molecular beam epitaxy of high quality AlGaN on Si and sapphire
We report the results of epitaxial growth experiments on AlxGa1−xN (0≤ x ≤ 1) on Si(111) and sapphire substrates aimed at understanding the origin and elimination of cracking. We describe growth procedures result...
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Article
Physical Characterization of Zirconium Doped Zinc Oxide Thin Firms Deposited by Spray Pyrolysis
Zinc oxide thin films doped with zirconium were prepared from solutions with do** material dispersed at several concentrations and using the spray pyrolysis technique.The films were deposited over sodocalcic...
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Article
ZnO: In Thin Films Prepared with Different Precursor Salts by Spray Pyrolysis and Studied by Electron Microscopy.
In this work we present some results of a systematical study of structural and optoelectronic properties of Zn O: In thin films obtained by spray pyrolysis when the acidity and the solvent used in starting sol...
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Article
Quantitative Measurement of Hydrogen Content in a-Si:H by Ar+ Excited Auger.
Hydrogenated amorphous silicon (a-Si:H) is well known by its applications for solar energy conversion devices in a large scale. Hydrogen has the capability of terminating the dangling bonds in the amorphous si...