The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 27, 1979
Filed:
Feb. 22, 1978
Nobuyuki Koguchi, Tokyo, JP;
Katashi Masumoto, Tokyo, JP;
National Research Institute for Metals, Tokyo, JP;
Abstract
A photovoltaic converter, useful for example as a photodetector or solar cell, comprising a main unit consisting of a p-n heterojunction of a p- or n-type magnetic semiconductor MCr.sub.2 X.sub.4 in which M is Zn, Cd or Hg and X is O, S, Se or Te and an n- or p-type semiconductor M'In.sub.2 S.sub.4 in which M' is Zn, Cd or Hg and which has an optical absorption edge at a shorter wavelength than the optical absorption edge of the MCr.sub.2 X.sub.4 ; a first electrode ohmically fixed to the surface of the MCr.sub.2 X.sub.4 ; and a second electrode fixed ohmically to the surface of the M'In.sub.2 S.sub.4 and allowing light to reach the surface of M'In.sub.2 S.sub.4. With a decrease in temperature, the photovoltaic converter has the long wavelength edge of its spectral photovoltaic response shifted to a longer wavelength contrary to known photovoltaic converters.