journal article·2021-08-24

Fabrication of a Wide Color Gamut pc-WLED Surpassing 107% NTSC Based on a Robust Luminescent Uranyl Phosphate

Xiaoze Wang, Enhai Song, Lianjie Qin, Daxiang Gui, Zhijun Xu, Jian Xie, Min Lei, Hongfa Zhang, Yanlong Wang, Yaxing Wang, Zhiguo Xia, Wei Liu, Wei Du, Shuao Wang

Chemistry of Materials· Volume 33· Issue 16
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Abstract

The development of green-light-emitting phosphors with combined narrow emission band, high quantum efficiency, and high chemical resistance remains to date one of the most challenging issues for wide color gamut WLED fabrication. In this work, uranyl ion (UO22+) endowed with broad and intense absorption capacity in blue region was incorporated into a rigid phosphate skeleton (namely HUP-2, formulated as (H3O)UO2PO4·(H2O)3) and results in near-unity internal and external quantum efficiencies (IQE/EQE) of up to 93.66 and 82.05% under the excitation of 282 nm, respectively. Benefiting from the structural robustness, the emission of HUP-2 displays excellent resistance to humidity, UV to visible light irradiation, and elevated temperature. The distinct electronic structure of UO22+ coupled with vibration gives rise to narrow emission bands (full width at half-maximum peak, FWHM = 43 nm), thus leading to a wide color gamut reaching 107.6% of the National Television System Committee standard (NTSC) of the fabricated pc-WLED. This work sheds light on the great potential of UO22+-containing phosphor for the application in liquid crystal display (LCD) backlighting.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Luminescence Properties of Advanced Materials · Radioactive element chemistry and processing · Radiation Detection and Scintillator Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Environmental and Material Engineering, Yantai University, Yantai 264005, China

State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510641, China

Anhui Province Key Laboratory of Functional Coordinated Complexes for Materials Chemistry and Application, School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, China

State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, 199 Ren’ai Road, Suzhou 215123, China

Funding

National Natural Science Foundation of China · Natural Science Foundation of Shandong Province · Top Discipline in Materials Science of Shandong Province · Young Taishan Scholars Program

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