Open AccessCALCULATION OF LUMINOUS EFFICACY,AND BOTH POWER AND QUANTUM EFFICIENC IES OF LED BY DIRECT INTEGRATION OF GAUSSIAN FUNCTIONS
Author(s) -
Kaisheng Hu
Publication year - 1978
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.27.691
Subject(s) - luminous flux , luminous efficacy , gaussian , semiconductor , visibility , light emitting diode , physics , luminous intensity , luminescence , optics , quantum efficiency , power (physics) , diode , quantum , spectral power distribution , optoelectronics , computational physics , materials science , quantum mechanics , nanotechnology , layer (electronics) , light source
The visibility aurve and the spectral energy distribution curve of light emitted by semiconductor diodes are approximated by Gaussian functions with appropriate parameters. The buminous efficiency and both power and quantum efficiencies of luminescence of LED can then be evaluated by direct integration when the total luminous flux was measured. Comparison of the calculated values with those obtained by means of planimeter shows fairly good agreement for three kinds of LED: GaP. GaAs0.62P0.38 and Ga0.68Al0.32As.