Patent ID: 6327554
Filing Date: 2001-12-04
Classification: G06E,H01L

Abstract:
A simulation method utilizing a simulation model from which emission spectra of an organic EL device are obtained, the organic EL device comprising a q-species layer located on a metal surface side of a light emitting source, and a p-species layer located on a side facing away from said metal surface side and having a refractive index different from that of said q-species layer, wherein said simulation model comprises the steps of:calculating a total composite wave .PHI.[.lambda.] composed of waves .PHI.nm reflected at interfaces of the organic EL device given by ##EQU27##wherein .lambda. is a wavelength, .PHI.nm is a reflected wave upon incidence from an n-layer on an m-layer, p>1, and q>1, and the p-layer is made of a glass or atmosphere;calculating a composite wave .PHI.1, which is encompassed in the total composite wave .PHI.[.lambda.] and is composed of a light component emitted in a first direction from the light emitting source and then emitted out without reflection at an interface, and a light component emitted in a second direction from the light emitting source, reflected in the first direction at the metal surface and then emitted out without reflection at another interface, given by ##EQU28##wherein nm is a refractive index of the m-layer, .DELTA.m is an optical path length of the m-layer, rmn is an amplitude reflectance upon incidence of a light wave from the m-layer on the n-layer, .PHI. is an amplitude of the light wave, .rho. is a square of the amplitude of the light wave, L is an optical path length, .lambda. is a wavelength, d is a film thickness, and n is a refractive index;calculating a light component, which is encompassed in the total composite wave .PHI.[.lambda.], and is emitted in the first direction from the light emitting source, reflected at a t-th layer interface, reflected in the first direction at the metal surface and then emitted out without reflection at the another interface, given by ##EQU29##calculating a light component, which is encompassed in the total composite wave .PHI.[.lambda.], and is emitted in the second direction from the light emitting source, reflected in the first direction at the t-th layer interface and then emitted out without reflection at the another interface, given by ##EQU30##calculating a light component, which is encompassed in the total composite wave .PHI.[.lambda.], and is emitted in the second direction from the light emitting source, reflected in the first direction at the metal surface, reflected at the t-th layer interface, reflected in the first direction at the metal surface and then emitted out without reflection at the another interface, given by ##EQU31##calculating a modulated spectrum .rho.[.lambda.] obtained from a composite wave of said light components given by ##EQU32##where -k is an amplitude reflectance at the metal surface and * is a complex number, andcalculating a spectrum I.sub.EL [.lambda.] subjected to optical modulation and emitted out through the p-layer given byI.sub.EL [.lambda.]=I.sub.PL [.lambda.].rho.[.lambda.]where I.sub.PL [.lambda.] is a spectrum of the light emitting source.