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Vanadium-pumped titanium x-ray laser
A resonantly photo-pumped x-ray laser is formed of a vanadium and titanium foil combination that is driven by two beams of intense line focused optical laser radiation. Ground state neon-like titanium ions are resonantly photo-pumped by line emission from fluorine-like vanadium ions.
Date:
February 13, 1991
Creator:
Nilsen, J.
System:
The UNT Digital Library
Amorphous silicon/polycrystalline thin film solar cells
An improved photovoltaic solar cell is described including a p-type amorphous silicon layer, intrinsic amorphous silicon, and an n-type polycrystalline semiconductor such as cadmium sulfide, cadmium zinc sulfide, zinc selenide, gallium phosphide, and gallium nitride. The polycrystalline semiconductor has an energy bandgap greater than that of the amorphous silicon. The solar cell can be provided as a single-junction device or a multijunction device.
Date:
March 13, 1991
Creator:
Ullal, H. S.
System:
The UNT Digital Library