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Title: Laser beam apparatus and method for analyzing solar cells

Abstract

A laser beam apparatus and method for analyzing, inter alia, the current versus voltage curve at the point of illumination on a solar cell and the open circuit voltage of a solar cell. The apparatus incorporates a lock-in amplifier, and a laser beam light chopper which permits the measurement of the AC current of the solar cell at an applied DC voltage at the position on the solar cell where the cell is illuminated and a feedback scheme which permits the direct scanning measurements of the open circuit voltage. The accuracy of the measurement is a function of the intensity and wavelength of the laser light with respect to the intensity and wavelength distribution of sunlight and the percentage the dark current is at the open circuit voltage to the short circuit current of the solar cell.

Inventors:
 [1]
  1. (Lawrenceville, NJ)
Issue Date:
Research Org.:
RCA Labs., Princeton, NJ (USA)
OSTI Identifier:
863588
Patent Number(s):
4205265
Assignee:
RCA Corporation (New York, NY) OSTI
DOE Contract Number:  
EY-76-C-03-1286
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
laser; beam; apparatus; method; analyzing; solar; cells; alia; current; versus; voltage; curve; illumination; cell; circuit; incorporates; lock-in; amplifier; light; chopper; permits; measurement; applied; dc; position; illuminated; feedback; scheme; direct; scanning; measurements; accuracy; function; intensity; wavelength; respect; distribution; sunlight; percentage; dark; beam apparatus; circuit voltage; solar cell; laser beam; laser light; solar cells; dc voltage; beam light; lock-in amplifier; dark current; /324/136/

Citation Formats

Staebler, David L. Laser beam apparatus and method for analyzing solar cells. United States: N. p., 1980. Web.
Staebler, David L. Laser beam apparatus and method for analyzing solar cells. United States.
Staebler, David L. Tue . "Laser beam apparatus and method for analyzing solar cells". United States. https://www.osti.gov/servlets/purl/863588.
@article{osti_863588,
title = {Laser beam apparatus and method for analyzing solar cells},
author = {Staebler, David L.},
abstractNote = {A laser beam apparatus and method for analyzing, inter alia, the current versus voltage curve at the point of illumination on a solar cell and the open circuit voltage of a solar cell. The apparatus incorporates a lock-in amplifier, and a laser beam light chopper which permits the measurement of the AC current of the solar cell at an applied DC voltage at the position on the solar cell where the cell is illuminated and a feedback scheme which permits the direct scanning measurements of the open circuit voltage. The accuracy of the measurement is a function of the intensity and wavelength of the laser light with respect to the intensity and wavelength distribution of sunlight and the percentage the dark current is at the open circuit voltage to the short circuit current of the solar cell.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {1}
}

Patent:

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