Optical Properties of Red-Emitting Rb2Bi(PO4)(MoO4):Eu3+ Powders and Ceramics with High Quantum Efficiency for White LEDs
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2019
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Abstract
There are several key requirements that a very good LED phosphor should meet, i.e., strong absorption, high quantum efficiency, high colour purity, and high luminescence quenching temperature. The reported Rb2Bi(PO4)(MoO4):Eu3+ phosphors have all these properties. The Rb2Bi(PO4)(MoO4):Eu3+ phosphors emit bright red light if excited with near-UV radiation. The calculated colour coordinates show good stability in the 77–500 K temperature range. Moreover, sample doped with 50% Eu3+ possesses quantum efficiency close to unity. Besides the powder samples, ceramic disks of Rb2Eu(PO4)(MoO4) specimen were also prepared, and the red light sources from these disks in combination with near-UV emitting LED were fabricated. The obtained results indicated that ceramic disks efficiently absorb the emission of 375 and 400 nm LED and could be applied as a red component in phosphor-converted white LEDs.
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grigorjevaite2019materialsoptical
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| Authors | Julija Grigorjevaite;Egle Ezerskyte;Agne Minderyte;Sandra Stanionyte;Remigijus Juskenas;Simas Sakirzanovas;Arturas Katelnikovas;Grigorjevaite, Julija;Ezerskyte, Egle;Minderyte, Agne;Stanionyte, Sandra;Juskenas, Remigijus;Sakirzanovas, Simas;Katelnikovas, Arturas; |
| Journal | Materials (Basel, Switzerland) |
| Year | 2019 |
| DOI |
10.3390/ma12193275
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