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有机电致发光材料与器件的研究已取得了重要进展,但要实现高信息含量的应用,器件的稳定性和效率仍须进一步提高。基于量子统计理论的研究结果表明,只有25%的电子空穴复合能量生成单线态激子,对于一个纯荧光的发光材料,在理论上,其器件效率的上限是光致发光效率的25%。三线态发光材料的应用,理论上可有效利用所有的复合能量,从而大幅度提高器件效率,目前已成为有机电致发光领域的研究热点。综述了有机三线态电致发光材料与器件的进展。 相似文献
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有机电致发光材料的能隙计算 总被引:1,自引:0,他引:1
有机电致发光材料具有可进行分子结构设计而改变其溶解性及光电性能等特点,以此为功能层、将电能转换为光能的有机电致发光二极管更是具备轻薄、高效、自发光、低能耗以及低成本可实现柔性器件等潜在优势。因此,研究合成高性能的有机电致发光材料并应用于制备可实用化的显示器及照明产品成了业界研究的热点。文中综述了以能带理论为基础,对有机电致发光材料进行结构设计改进发光性能时对将合成的材料的能隙计算的理论模型与计算方法及其应用进展,可望为聚合物发光材料的合成设计提供理论支持。 相似文献
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有机/高分子电致发光器件是当前国内外平板显示器技术领域的研究热点,8-羟基喹啉金属配合物(8HQM)以其优良的电致发光性能成为研制高效率的有机/高分子电致发光器件的首选材料.针对近十年来8HQM电致发光材料的研究状况,对其电致发光机制、分子结构及发光性能的关系、分子种类及其最新研究进展,进行综述,展望了其发展趋势. 相似文献
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三(8-羟基喹啉)铝(Alq3)发光性能的调控 总被引:1,自引:0,他引:1
三(8-羟基喹啉)铝(Alq3)是有机电致发光器件的基础材料.本文评述了如何通过分子的化学修饰和聚集态结构的改变来调控其发光光谱,提高发光效率.这将为开发高性能的有机电致发光材料及器件提供参考与依据. 相似文献
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稀土材料素有“工业维生素”或“工业味精”之美称,被广泛应用于信息、能源、交通、环境、航天航空等领域。稀土材料也是我国具有特色的战略资源。稀土材料独特的4f壳层电子结构具有丰富的能级结构和优良的光、电、磁、核等物理特性,使得稀土发光配合物可实现从紫外光到红外光的荧光发射,同时具有发光峰窄、稳定性好以及光色可调等特点,在有机电致发光器件研究领域引起了广泛关注。本文综述了基于合理的设计选择有机配体,调控稀土配合物宇称禁阻4f-4f跃迁和宇称允许5d-4f跃迁两种发光机制,并进一步总结其在有机电致发光器件中运用的研究进展,为新型高性能有机电致发光器件的设计与优化提供了新思路。 相似文献
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硅基发光材料研究进展 总被引:8,自引:0,他引:8
硅基发光材料是光电子集成的基础材料。发光多孔硅是硅基发光材料的一个新进展,已实现了硅基光电子集成。随着多孔硅研究的深化和纳米科学的发展,硅基发光材料正向纳米方向开拓,与此同时,在新的理论认识与技术条件下,硅材料改性,杂质发光,缺陷工程和硅然异质外延也呈现出新的发展趋势。 相似文献
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Takashi Matsuoka 《Advanced materials (Deerfield Beach, Fla.)》1996,8(6):469-479
Recent progress in research on InGaAlN and II–VI systems has been remarkable, and this paper reviews the properties of these materials from the viewpoint of making reliable light-emitting devices. The growth of these materials by molecular beam epitaxy (MBE) and metalorganic vapor phase epitaxy (MOVPE) is also reviewed, and the current status of both materials is reviewed with respect to light-emitting devices. 相似文献
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The demonstration of colour tunability and high efficiency has brought organic light-emitting diodes (OLEDs) into the displays and lighting market. However, high production costs due to expensive deposition techniques and the use of reactive materials still limit their market entry, highlighting the need for novel concepts. This has driven the research towards the integration of both organic and inorganic materials into devices that benefit from their respective peculiar properties. The most representative example of this tendency is the application of metal oxides in organic optoelectronics. Metal oxides combine properties such as high transparency, good electrical conductivities, tuneable morphology, and the possibility of deposition on large areas with low-cost techniques. The use of metal oxides as charge injection interfaces in OLEDs has also been investigated. Hybrid organic-inorganic light-emitting diodes (HyLEDs) are inverted OLEDs that employ air-stable metal oxides as the charge injection contacts. They are emerging as a potential competitor to standard OLEDs, thanks to their intrinsic air stable electrodes and solution processability, which could result in low-cost, large area, light-emitting devices. This article reviews the short history of this class of devices from its first solid state example published in 2006 to the present achievements. The data presented shed light on the electronic mechanism behind the functioning of HyLEDs and give guidelines for their further optimization. 相似文献
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Jialiang Xu Xinyue Li Jianbo Xiong Chunqing Yuan Sergey Semin Theo Rasing Xian-He Bu 《Advanced materials (Deerfield Beach, Fla.)》2020,32(3):1806736
Halide perovskites provide an ideal platform for engineering highly promising semiconductor materials for a wide range of applications in optoelectronic devices, such as photovoltaics, light-emitting diodes, photodetectors, and lasers. More recently, increasing research efforts have been directed toward the nonlinear optical properties of halide perovskites because of their unique chemical and electronic properties, which are of crucial importance for advancing their applications in next-generation photonic devices. Here, the current state of the art in the field of nonlinear optics (NLO) in halide perovskite materials is reviewed. Halide perovskites are categorized into hybrid organic/inorganic and pure inorganic ones, and their second-, third-, and higher-order NLO properties are summarized. The performance of halide perovskite materials in NLO devices such as upconversion lasers and ultrafast laser modulators is analyzed. Several potential perspectives and research directions of these promising materials for nonlinear optics are presented. 相似文献
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