| 摘要 |
Solid state lighting devices include a first luminescent element (612) emitting light having a first spectrum, and a second luminescent element (614) emitting light having a second spectrum. The first luminescent element includes a first electroluminescent element (612a) that emits a first pump light, and a first light converting element (612b) that converts at least some of the first pump light to a first re-emitted light component. The second luminescent element includes a second electroluminescent element (614a) that emits a second pump light, and a second light converting element (614b) that converts at least some second pump light to a second re-emitted light component. The first and/or second light converting element includes a potential well. Light emitted by the first and second luminescent elements combine to provide a device output, which can approximate a Planckian locus over a range of color temperatures and exhibit a color rendering index of at least 60, 70, or 80. |
