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High-efficiency solution-processed light-emitting diode based on a phosphorescent Ag3Cu5 cluster complex
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2021-3-27 , DOI: 10.1039/d1tc00305d
Zhu Jiao 1, 2, 3, 4, 5 , Ming Yang 3, 4, 5, 6, 7 , Jin-Yun Wang 3, 4, 5, 6, 7 , Ya-Zi Huang 3, 4, 5, 6, 7 , Pei Xie 1, 2, 3, 4, 5 , Zhong-Ning Chen 1, 2, 3, 4, 5
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2021-3-27 , DOI: 10.1039/d1tc00305d
Zhu Jiao 1, 2, 3, 4, 5 , Ming Yang 3, 4, 5, 6, 7 , Jin-Yun Wang 3, 4, 5, 6, 7 , Ya-Zi Huang 3, 4, 5, 6, 7 , Pei Xie 1, 2, 3, 4, 5 , Zhong-Ning Chen 1, 2, 3, 4, 5
Affiliation
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A dpppy-protected (dpppy = 2,6-bis(diphenylphosphino)pyridine) d10–d10 heterooctanuclear cluster complex [Ag3Cu5(ebzcz)6(dpppy)3](ClO4)2 (Hebzcz = 1-(3,6-di-tert-butylcarbazol-9-yl)-4-ethynylbenzene) was prepared by self-assembly reaction and characterized by single crystal X-ray diffraction. The diphosphine-supported Ag3Cu5 cluster structure is highly stabilized through substantial Cu–Ag and Cu–Cu intermetallic interactions. Since the Ag3Cu5 cluster is sufficiently shielded by bulky ligands (three ebzcz and three dpppy), thermally non-radiative relaxation is strongly prohibited so as to give brilliant photoluminescence under ambient conditions. As revealed by TD-DFT studies, the luminescence arises from metal cluster-centred 3[d → p/s] and 3[π (ebzcz) → π* (dpppy)] 3LLCT (ligand-to-ligand charge transfer) transitions. Taking advantage of Ag3Cu5 cluster complex as a phosphorescent dopant, a high-efficiency solution-processed organic light-emitting diode is achieved with a peak current efficiency of 38.1 cd A−1, a power efficiency of 29.9 lm W−1 and an external quantum efficiency of 14.7%.
中文翻译：
基于磷光Ag3Cu5团簇配合物的高效固溶处理发光二极管
受dpppy保护的（dpppy = 2,6-双（二苯基膦基）吡啶）d 10 -d 10杂核簇复合物[Ag 3 Cu 5（ebzcz）6（dpppy）3 ]（ClO 4）2（Hebzcz = 1-（通过自组装反应制备了3，6-二叔丁基咔唑-9-基）-4-乙炔基苯，并通过单晶X射线衍射对其进行了表征。二膦支撑的Ag 3 Cu 5簇结构通过大量的Cu-Ag和Cu-Cu金属间相互作用而高度稳定。自Ag 3 Cu 5团簇被庞大的配体（三个ebzcz和三个dpppy）充分屏蔽，强烈禁止热非辐射弛豫，以便在环境条件下产生明亮的光致发光。TD-DFT研究表明，发光源于金属簇中心的3 [d→p / s]和3 [π（ebzcz）→π*（dpppy）] 3 LLCT（配体到配体的电荷转移）跃迁。利用Ag 3 Cu 5团簇配合物作为磷光掺杂剂，可以实现高效溶液处理的有机发光二极管，其峰值电流效率为38.1 cd A -1，功率效率为29.9 lm W -1，外部量子效率为14.7％。
更新日期：2021-04-13
中文翻译：
基于磷光Ag3Cu5团簇配合物的高效固溶处理发光二极管
受dpppy保护的（dpppy = 2,6-双（二苯基膦基）吡啶）d 10 -d 10杂核簇复合物[Ag 3 Cu 5（ebzcz）6（dpppy）3 ]（ClO 4）2（Hebzcz = 1-（通过自组装反应制备了3，6-二叔丁基咔唑-9-基）-4-乙炔基苯，并通过单晶X射线衍射对其进行了表征。二膦支撑的Ag 3 Cu 5簇结构通过大量的Cu-Ag和Cu-Cu金属间相互作用而高度稳定。自Ag 3 Cu 5团簇被庞大的配体（三个ebzcz和三个dpppy）充分屏蔽，强烈禁止热非辐射弛豫，以便在环境条件下产生明亮的光致发光。TD-DFT研究表明，发光源于金属簇中心的3 [d→p / s]和3 [π（ebzcz）→π*（dpppy）] 3 LLCT（配体到配体的电荷转移）跃迁。利用Ag 3 Cu 5团簇配合物作为磷光掺杂剂，可以实现高效溶液处理的有机发光二极管，其峰值电流效率为38.1 cd A -1，功率效率为29.9 lm W -1，外部量子效率为14.7％。
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