Patent ID: 6631147
Filing Date: 2003-10-07
Classification: H01S

Abstract:
An organic semiconductor laser device comprising a positive electrode layer, an electron hole-transporting layer, a light-emitting layer containing an organic dye and having an open end, an electron-transporting layer, and a negative electrode layer in order, under the condition that light emitted in the light-emitting layer by applying a voltage between the positive electrode layer and the negative electrode layer is recovered from the open end of the light-emitting layer, wherein the electron hole-transporting layer and the electron transporting layer satisfy the following conditions:11/n2 and 11/n3 wherein n1 is a refractive index of the light-emitting layer determined at a wavelength of the light emitted in the light-emitting layer, n2 is a refractive index of the electron hole-transporting layer determined at the wavelength of the emitted light, and n3 is a refractive index of the electron-transporting layer determined at the wavelength of the emitted light; 0.16<n2Ã—d2Ã—(n1n2)2-1Î»0.16<n3Ã—d3Ã—(n1n3)2-1Î»wherein n1, n2 and n3 have the same meanings as defined above, d2 stands for thickness of the electron hole-transporting layer, d3 stands for thickness of the electron transporting layer, and &lgr; stands for the wavelength of light emitted in the light-emitting layer; andwherein the thickness of the electron hole-transporting layer is less than 2000 nm and the thickness of the electron-transporting layer is less than 2000 nm.