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US 9,431,584 B2Granted
Light converting and emitting device with suppressed dark-line defects
Assignee3M Innovative Properties Company
InventorsMichael A. Haase, Thomas J. Miller, Terry L. Smith, Xiaoguang Sun, Junqing Xie
Life of this patent
Estimating the term…
Abstract
Light emitting systems are described. Particularly, light emitting systems and light converting components utilized within these systems are described. The light emitting system and components are formed such that dark-line defects do not interfere with the light emitting system efficiency.
Claims17
A wavelength converting stack of semiconductor layers, comprising:
- at least one absorber layer absorbing light at a wavelength λ1, but not light at a longer wavelength λ2,
- at least one potential well layer converting at least a portion of light of wavelength λ1 into light of wavelength λ2, and
- a window layer substantially transparent to λ1, wherein the window layer is a II-VI semiconductor having a composition of BeCdMgZnSe.
A light emitting system, comprising
- an LED emitting light at a first wavelength;
- and
- a light converting semiconductor element capable of receiving light of the first wavelength from the LED and converting at least part of the light into light of a second wavelength, wherein the light converting semiconductor element comprises a window layer that is a II-VI semiconductor having a composition of BeCdMgZnSe, wherein the window layer is substantially transparent to the light of the first wavelength.
Dependencies are inferred from the claim text.