铽
电致发光
乙酰丙酮
磷光
发光
基质(水族馆)
光化学
材料科学
铕
化学
无机化学
图层(电子)
光电子学
纳米技术
荧光
光学
物理
海洋学
地质学
作者
You‐Xuan Zheng,Jun Lin,Yujun Liang,Lin Qi,Yingning Yu,Qi Meng,Yonghui Zhou,Shubin Wang,Hongyan Wang,Hongjie Zhang
摘要
By comparing the phosphorescence spectra of Gd(acac)3 (acac = acetylacetone), Gd(TFacac)3 (TFacac = 1,1,1-trifluoroacetylacetone), the effects of fluorine replacement of hydrogen on the triplet state energy of the ligands were revealed. Fluorine can lower the triplet state energy of Hacac and make it more suitable for energy transfer towards the 5D4 state of terbium. Organic electroluminescent devices (OELDs) with the corresponding trivalent terbium complexes as emissive layers were fabricated. Triple-layer-type devices with a structure of glass substrate/ITO (indium tin oxide)/PVK [poly(N-vinylcarbazole)]/PVK∶Tb complex: PBD [2-(4-biphenyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole]/PBD/Al exhibit bright green luminescence upon applying a dc voltage. The luminance of a device with Tb(TFacac)3phen (1,10-phenanthroline) and Tb(TFacac)3 as emissive layer is higher than that of the corresponding devices with Tb(acac)3(phen) and Tb(acac)3 as emissive layers. The EL device with Tb(TFacac)3(phen) as emitter exhibits characteristic emission of Tb3+ ions with a maximum luminance of 58 cd m−2 at 25 V.
科研通智能强力驱动
Strongly Powered by AbleSci AI