@article{02af507ad7d64a5ca71f4e5f93d45de5,
title = "High-Performance NaK2Li[Li3SiO4]4:Eu Green Phosphor for Backlighting Light-Emitting Diodes",
abstract = "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. ",
author = "Fang, {Mu Huai} and Mariano, {Carl Osby M.} and Chen, {Kuan Chun} and Lin, {Jia Cheng} and Zhen Bao and Sebastian Mahlik and Tadeusz Lesniewski and Lu, {Kuang Mao} and Lu, {Ying Rui} and Wu, {Yu Jong} and Sheu, {Hwo Shuenn} and Lee, {Jyh Fu} and Hu, {Shu Fen} and Liu, {Ru Shi} and Attfield, {J. Paul}",
note = "Funding Information: This work was supported by the Ministry of Science and Technology of Taiwan (contract nos. MOST 109-2112-M-003-011, MOST 109-2113-M-002-020-MY3, MOST 107-2113-M-002-008-MY3, MOST 110-2923-M-002-017-MY3, MOST 107-2923-M-002-004-MY3, and MOST 106-2112-M-003-007-MY3), the National Science Centre Poland Grant Opus (no. 2016/23/B/ST3/03911 and no. 2019/33/B/ST3/00406), and The National Centre for Research and Development Poland Grant (no. PL-TW/V/1/2018). J.P.A. acknowledges financial support from EPSRC, U.K. Publisher Copyright: {\textcopyright} 2021 American Chemical Society.",
year = "2021",
month = mar,
day = "9",
doi = "10.1021/acs.chemmater.1c00180",
language = "English",
volume = "33",
pages = "1893--1899",
journal = "Chemistry of Materials",
issn = "0897-4756",
publisher = "American Chemical Society",
number = "5",
}