Thermally Stable White Emitting Eu3+ Complex@Nanozeolite@Luminescent Glass Composite with High CRI for Organic-Resin-Free Warm White LEDs
Thermally Stable White Emitting Eu3+ Complex@Nanozeolite@Luminescent Glass Composite with High CRI for Organic-Resin-Free Warm White LEDs
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用于无有机树脂暖白光 LED 的热稳定白光发射 Eu3 配合物@纳米沸石@高显色指数发光玻璃复合材料
DOI：
10.1021/acsami.6b15739
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发表时间：
2017
影响因子：
9.5
通讯作者：
Wang Jing
中科院分区：
文献类型：
--
作者：
Zhang Jinhui;Gong Shuming;Yu Jinbo;Li Peng;Zhang Xuejie;He Yuwei;Zhou Jianbang;Shi Rui;Li Huanrong;Peng Aiyun;Wang Jing
目前，镧系配合物在固态照明中的应用仍是一个很大的挑战，特别是在大功率LED中，当LED工作在大电流下时，它们会遭受严重的热致发光猝灭和透射率损失。本论文通过在咪唑基阻挡层功能化的纳米沸石（NZ）中引入铕配合物，不仅获得了高效、热化学稳定的红色发光杂化材料，而且通过将其涂覆到具有高热导率（1.07 W/mK）的耐热发光玻璃（LG）上，降低了其热致透射率损失和发光猝灭行为。结果表明，Eu（PPO）n-C4 Si @NZ@LG在400 K时的强度为300 K时的21.48%，分别是Eu（PPO）3·2 H2O和Eu（PPO）n-C4 Si @NZ的153倍和13倍。此外，简单地通过将NUV-Chip-On-Board与发射暖白色光的玻璃-膜复合材料（即，涂有红色发射混合膜的黄绿色发射发光玻璃）。我们的方法和结果为镧系配合物应用于普通照明提供了一条可行的途径。
Nowadays, it is still a great challenge for lanthanide complexes to be applied in solid state lighting, especially for high-power LEDs because they will suffer severe thermal-induced luminescence quenching and transmittance loss when LEDs are operated at high current. In this paper, we have not only obtained high efficient and thermally chemical stable red emitting hybrid material by introducing europium complex into nanozeolite (NZ) functionalized with the imidazolium-based stopper but also abated its thermal-induced transmittance loss and luminescence quenching behavior via coating it onto a heat-resistant luminescent glass (LG) with high thermal conductivity (1.07 W/mK). The results show that the intensity at 400 K for Eu(PPO)n-C4Si@NZ@LG remains 21.48% of the initial intensity at 300 K, which is virtually 153 and 13 times the intensity of Eu(PPO)3·2H2O and Eu(PPO)n-C4Si@NZ, respectively. Moreover, an organic-resin-free warm white LEDs device with a low CCT of 3994K, a high Ra of 90.2 and R9 of 57.9 was successfully fabricated simply by combining NUV-Chip-On-Board with a warm white emitting glass-film composite (i.e., yellowish-green emitting luminescent glass coated with red emitting hybrid film). Our method and results provide a feasible and promising way for lanthanide complexes to be used for general illumination in the future.