Realization of white-light-emitting diodes from a high-brightness zirconium-based metal–organic gel driven by the AIE effect

Jianxin Song; Lisha Jiang; Xiaoze Wang; Chuanxin Hou; Xuemin Wang; Zijun Xu; Chao Liang; Mengnan Yuan; Chuan Tan; Jing Yang; Enhai Song; Yanlong Wang; Wei Liu

doi:10.1039/D3DT03184E

Realization of white-light-emitting diodes from a high-brightness zirconium-based metal–organic gel driven by the AIE effect†

Jianxin Song,

‡^a Lisha Jiang,‡*^a Xiaoze Wang,^b Chuanxin Hou,*^a Xuemin Wang,^a Zijun Xu,^a Chao Liang,^a Mengnan Yuan,^d Chuan Tan,^a Jing Yang,^e Enhai Song,

^c Yanlong Wang*^f and Wei Liu

*^a

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* Corresponding authors

^a School of Environmental and Material Engineering, Yantai University, Yantai, Shandong, China
E-mail: jianglisha0112@ytu.edu.cn, chuanxin210@ytu.edu.cn, wliu@ytu.edu.cn

^b MOE Key Laboratory for Analytical Science of Food Safety and Biology and State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, China

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

^d School of Civil Engineering, Yantai University, Yantai 264005, China

^e College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, PR China

^f 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, PR China
E-mail: ylwang@suda.edu.cn

Abstract

Developing luminescent materials with suitable correlated color temperature (CCT) and sufficient color-rendering index (CRI) is a challenging problem in the field of commercialized warm white LED lighting. Herein, a novel metal–organic gel (MOG) material named YTU-G-1(SE) was synthesized, consisting of zirconium metal coordinated with 1,1,2,2-tetrakis(4-carboxyphenyl) ethylene. YTU-G-1(SE) exhibits strong fluorescent properties with an aggregation-induced emission (AIE) effect, emitting yellow-green fluorescence at 515 nm. The internal and external quantum efficiencies (IQE/EQE) of YTU-G-1(SE) are close to unity, with values of 95.74 ± 0.5% and 88.67 ± 0.5%, respectively. Finally, we combined YTU-G-1(SE) with a commercial blue chip and a commercial red phosphor (Sr,Ca)AlSiN₃:Eu²⁺ to fabricate a warm white light LED with a color temperature of 3736 K, a color-rendering index R_a of 88.2, and a lumen efficiency of 79.42 lm W⁻¹. This work provides a new approach to regulating the emission of AIE and offers a novel idea for developing high-performance warm-white pc-WLEDs.

Dalton Transactions

Realization of white-light-emitting diodes from a high-brightness zirconium-based metal–organic gel driven by the AIE effect†

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Realization of white-light-emitting diodes from a high-brightness zirconium-based metal–organic gel driven by the AIE effect

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