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PV Cell Testing

Photonics Spectra
Sep 2010
CRAIC TechnologiesRequest Info
 
For solar photovoltaic (PV) cell testing applications, Craic Technologies Inc. has unveiled the 20/20 Solar microspectrophotometer, which is designed to measure the thickness of thin films as well as the optical efficiencies and clarity of photovoltaic cells. This can be done by both transmission and reflectance, whether the solar cells are the traditional crystalline silicon substrates or one of the thin-film varieties. Protective glasses and concentrator modules also can be analyzed for their efficiency. The device can be combined with proprietary contamination imaging capabilities to locate and identify process contaminants. It combines advanced microspectroscopy with sophisticated software to enable the user to measure transmissivity, reflectivity and luminescence. It can determine the thin-film thickness of many types of materials and substrates and can measure the transmissivity and reflectivity from many of the components used to manufacture PV cells, such as concentrators.


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GLOSSARY
luminescence
See fluorescence; phosphorescence.
microspectrophotometer
A specialized spectrophotometer for use through a microscope on very small areas of an object.
optical
Pertaining to optics and the phenomena of light.
photovoltaic cell
Also known as a self-generating barrier layer cell. A photoelectric detector that converts radiant flux directly into electrical current. Generally, it consists of a thin silver film on a semiconductor layer deposited on an iron substrate.  
reflectance
The ratio of reflected flux to incident flux. Unless otherwise specified, the total reflectance is meant; it is sometimes convenient to divide this into the sum of the specular and the diffuse reflectance.
thin film
A thin layer of a substance deposited on an insulating base in a vacuum by a microelectronic process. Thin films are most commonly used for antireflection, achromatic beamsplitters, color filters, narrow passband filters, semitransparent mirrors, heat control filters, high reflectivity mirrors, polarizers and reflection filters.
transmissivity
The internal transmittance per unit thickness of a nondiffusing material.
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