发明名称 |
Light emitting diode comprising semiconductor nanocrystal complexes and powdered phosphors |
摘要 |
A white light light emitting diode (LED) formed by depositing an LED chip that emits light at a first wavelength and forming a semiconductor nanocrystal complex. The semiconductor nanocrystal complex absorbs at least a portion of the light emitted by the LED chip and emits light at a second wavelength. The semiconductor nanocrystal complex and a powdered phosphor are deposited over the LED chip. The powdered phosphor also absorbs a portion of the light emitted by the LED chip and emits light at a third wavelength. The semiconductor nanocrystal complex is selected to provide a color of the spectrum that is lacking from the combined output of phosphor/LED chip combination, to improve a Color Rating Index (CRI) value and to provide a "warmer" light. The semiconductor nanocrystal complex and the powdered phosphor can be mixed into the same matrix material or into separate matrix materials and/or deposited as separate layers.
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申请公布号 |
US2007012928(A1) |
申请公布日期 |
2007.01.18 |
申请号 |
US20060485335 |
申请日期 |
2006.07.13 |
申请人 |
PENG ZOUYAN;LOCASCIO MICHAEL;CHEON KWANG-OHK |
发明人 |
PENG ZOUYAN;LOCASCIO MICHAEL;CHEON KWANG-OHK |
分类号 |
H01L33/50 |
主分类号 |
H01L33/50 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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