TY - PAT
T1 - Phosphor-converted light-emitting diode with dielectric spacer
AU - Pal, Debapriya
AU - Koenderink, A. Femius
AU - Lopez-Julia, Antonio
AU - Abdelkhalik, Mohamed S.
AU - Gómez Rivas, Jaime
AU - Vaskin, Aleksandr
PY - 2024/9/19
Y1 - 2024/9/19
N2 - A light-emitting device includes: a semiconductor diode structure, a reflector, a wavelength-converting layer, and an intermediate spacer between the diode structure and the wavelength-converting layer. The diode structure emits diode output light at a vacuum wavelength λ0 to propagate within the diode structure. The reflector is on the back diode structure and internally reflects diode internally incident output light. The wavelength-converting layer is positioned with its back surface facing and spaced-apart from a front surface of the diode structure, and absorbs diode output light at λ0 and emits down-converted light at a vacuum wavelength λ1>λ0, which exits the wavelength-converting layer through its front surface. The intermediate spacer includes one or more transparent dielectric layers and has an effective refractive index less than that of the wavelength-converting layer, so that the wavelength-converting layer acts as an optical waveguide supporting one or more laterally propagating optical modes at λ0 and λ1.
AB - A light-emitting device includes: a semiconductor diode structure, a reflector, a wavelength-converting layer, and an intermediate spacer between the diode structure and the wavelength-converting layer. The diode structure emits diode output light at a vacuum wavelength λ0 to propagate within the diode structure. The reflector is on the back diode structure and internally reflects diode internally incident output light. The wavelength-converting layer is positioned with its back surface facing and spaced-apart from a front surface of the diode structure, and absorbs diode output light at λ0 and emits down-converted light at a vacuum wavelength λ1>λ0, which exits the wavelength-converting layer through its front surface. The intermediate spacer includes one or more transparent dielectric layers and has an effective refractive index less than that of the wavelength-converting layer, so that the wavelength-converting layer acts as an optical waveguide supporting one or more laterally propagating optical modes at λ0 and λ1.
M3 - Patent publication
M1 - US2024/0313178A1
Y2 - 2024/03/17
ER -