The luminescence study ofNaK2Li[Li3SiO4]4:Eu coumpounds.

Description

Narrowband green phosphors with high quantum efficiency are required for backlighting white light-emitting diode (WLED) devices. Materials from the A[Li₃SiO₄]₄:Eu²⁺ family have recently been proposed as having superior properties to industry-standard β-SiAlON green phosphors. Here, we show that a cheap, easily synthesized host NaK₂Li[Li₃SiO₄]₄ (NKLLSO) doped with a mixture of Eu²⁺ and Eu³⁺ is an outstanding narrowband green phosphor, with an external quantum efficiency of 51% and superb thermal stability (97.1% of room-temperature performance at 150 °C). Structural studies reveal that green emission occurs from two Eu²⁺ sites, while Eu³⁺ introduces a high concentration of vacancies that may suppress quenching from energy transfer between Eu²⁺ sites. A WLED package constructed using our NKLLSO phosphor shows extremely high color vividness, competitive with a β-SiAlON comparator. This work will stimulate further research on efficient green phosphors for practical WLED devices.

In that dataset, the photoluminescence spectra: at cryogenic temperature, temperature dependence and pressure dependence of photoluminescence and temperature dependence of luminescence kinetics: temperature dependence are provided.

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NaKLiSiO raw data.rar

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Raw data:: Data contained in dataset was not processed.

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Year of publication:

2021

Verification date:

2022-03-04

Dataset language:

English

Fields of science:

physical sciences (Natural sciences)

DOI:

10.34808/6fm6-at98

Verified by:

No verification

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