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US 10,538,699 B2Granted
Lighting device having a photoconversion layer
AssigneeSamsung Display Co., Ltd.
InventorsDongchan Kim, Yisu Kim, Byoungduk Lee, Yoonhyeung Cho, Yongchan Ju
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Abstract
A lighting device includes a light source and a photoconversion layer including a perovskite compound represented by Formula 1. The perovskite compound absorbs at least part of light emitted from the light source and emits light having a different wavelength range from the absorbed light: [A][B][X]3 <Formula 1> In Formula 1, A is at least one monovalent organic cation, at least one a monovalent inorganic cation, or any combination thereof, B is at least one divalent inorganic cation, and X is at least one monovalent anion.
Claims19
A lighting device comprising:
- a light source;
- and
- a photoconversion layer comprising a perovskite compound represented by Formula 1, the perovskite compound absorbing at least part of light emitted from the light source and emitting light having a different wavelength range from a wavelength range of the absorbed light:
- [A][B][X]3 <Formula 1>
- wherein, in Formula 1,
- A is at least one monovalent organic cation, at least one a monovalent inorganic cation, or any combination thereof,
- B is at least one divalent inorganic cation, wherein B includes at least one divalent inorganic cation selected from La2+, Ce2+, Pr2+, Nd2+, Pm2+, Eu2+, Gd2+, Tb2+, Ho2+, Er2+, Tm2+, Yb2+, Lu2+, Be2+, Mg2+, Ca2+, Sr2+, Ba2+, Ra2+, and
- X is at least one monovalent anion.
5 more elements
Dependencies are inferred from the claim text.