Electroluminescent Guest@MOF Nanoparticles for Thin Film Optoelectronics and Solid‐State Lighting,Advanced Optical Materials

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Electroluminescent Guest@MOF Nanoparticles for Thin Film Optoelectronics and Solid‐State Lighting
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2020-06-11 , DOI: 10.1002/adom.202000670
Mario Gutiérrez ₁ , Cristina Martín _{2,

3} , Mark Van der Auweraer ₃ , Johan Hofkens ₃ , Jin‐Chong Tan ₁

Affiliation

Light‐emitting diodes (LEDs) are an efficient source of lighting, with many commercial applications like general illumination, camera flashes, phone or laptop displays, and TV screens. However, they present certain limitations, including low‐quality color rendition, and the use of expensive/toxic rare‐earth elements. There is therefore an urgent need for the development of improved luminescent materials free of rare earths. Luminescent metal–organic framework (LMOF) materials are promising candidates for photonics devices. Most MOF‐LEDs reported are of the down‐converter type, where UV or blue LED are coated with LMOFs, however there is limited progress in the development of LED using LMOFs as the electroluminescent layer. Herein, it is reported a novel Guest@MOF composite synthesized by encapsulating a semiconducting Gaq3 metal complex [gallium(III) tris(8‐hydroxyquinolinato)], into the ZIF‐8 pore [Zn (2‐methylimidazolate)₂], yielding a green‐yellowish luminescent material exhibiting a relatively high quantum yield of 15% upon photoexcitation. Subsequently, a down‐converter LED comprising 405‐nm violet LED coated with Gaq3@ZIF‐8, yielding a white MOF‐LED is shown. Then the use of Gaq3@ZIF‐8 as an electroluminescent layer in a hybrid‐LED, achieving an orange‐yellowish light emitting device is demonstrated. This work reveals the potential of LMOFs for next‐generation LED technology, by exploiting the Guest@MOF concept to enable electroluminescent applications.

中文翻译：

用于薄膜光电和固态照明的电致发光Guest @ MOF纳米颗粒

发光二极管（LED）是一种高效的照明源，在许多商业应用中，例如普通照明，照相机闪光灯，电话或笔记本电脑的显示器以及电视屏幕。但是，它们存在一定的局限性，包括低质量的颜色再现以及昂贵/有毒稀土元素的使用。因此，迫切需要开发不含稀土的改进的发光材料。发光金属有机框架（LMOF）材料是光子学设备的有希望的候选人。报告的大多数MOF-LED均为下变频器型，其中UV或蓝色LED涂有LMOF，但是使用LMOF作为电致发光层的LED的开发进展有限。在这里₂ ]，产生绿色-黄色发光材料，在光激发下具有相对较高的量子产率（15％）。随后，显示了一个下变频器LED，其中包括涂有Gaq3 @ ZIF-8的405-nm紫罗兰色LED，产生了白色MOF-LED。然后展示了在混合LED中使用Gaq3 @ ZIF-8作为电致发光层，实现了橙黄色发光器件。通过利用Guest @ MOF概念来实现电致发光应用，这项工作揭示了LMOF在下一代LED技术中的潜力。

更新日期：2020-08-19

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