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:
Jul. 12, 2011
Filed:
Aug. 25, 2010
Rajesh R. Naik, Dayton, OH (US);
Lawrence L. Brott, West Chester, OH (US);
George D. Jia, Lock Haven, PA (US);
Rajesh R. Naik, Dayton, OH (US);
Lawrence L. Brott, West Chester, OH (US);
George D. Jia, Lock Haven, PA (US);
The United States of America as represented by the Secretary of the Air Force, Washington, DC (US);
Abstract
This patent covers infrared phosphorescent materials which exhibit extended persistence lifetimes and are composed of mixtures of the elements zinc, antimony, gallium, tellurium, oxygen and nitrogen, and are doped with varying amounts of chromium, neodymium, dysprosium, yttrium or thulium. A typical formula is given by ZnSbGaTeON: n % Cr, m % P, l % Q, where Zn is zinc, Sb is antimony, Ga is gallium, Te is tellurium, O is oxygen, N is nitrogen. Additionally, x (0 to 2) y (0 to 0.5) and z (0 to 1) are the molar concentration in the composition. Cris the doped chromium ion, P is a codopant and Q is a second codopant and n, m, l are the concentration respectively (m,m,l are from 0.1 to 10). An example is the material ZnSbGaTeON:3% Cr, 1% Nd, which has an emission peak at 760 nm and a persistent time of over 20 hours (measured with Fluorolog-3 spectrometer with a PMT detector).