首页 | 本学科首页   官方微博 | 高级检索  
   检索      


Red emissive ternary europium complexes: synthesis,optical, and luminescence characteristics
Authors:Anuj Dalal  Kapeesha Nehra  Anjli Hooda  Devender Singh  Sumit Kumar  Rajender Singh Malik
Institution:1. Department of Chemistry, Maharshi Dayanand University, Rohtak, India;2. Department of Chemistry, DCR University of Science & Technology, Murthal, Haryana, India
Abstract:Solid ternary europium complexes consisting of fluorinated β-diketone (thenoyltrifluoroacetone, TTFA) and heteroaromatic bidentate auxiliary ligands were synthesized. The luminescence features of the complexes were estimated using various spectral measurements and clearly proved that the Eu3+ ion is efficiently sensitized by ligands by an antenna effect. Photoluminescence excitation spectra have shown that Eu(III) complexes are excited effectively in the ultraviolet (UV) region and the corresponding emission spectra consist of characteristic peaks attributed to the 5D07FJ transitions of the europium ion with the strongest emission peak at 611 nm (5D07F2). From photoluminescence (PL) data, decay time, Judd–Ofelt parameters, transition rates, and quantum efficiency of the complexes were also determined. The Commission Internationale de l'éclairage (CIE) colour coordinates indicated the bright red emission of ternary europium complexes. Correlated colour temperature values indicated the utilization of these complexes in display devices. Judd–Ofelt and photophysical parameters were also estimated theoretically using LUMPAC software. Various frontier molecular orbitals and their respective energy were determined. These red emissive europium complexes could be utilized for fabricating solid-state lighting systems.
Keywords:colour coordinates  europium  Judd–Ofelt parameters  luminescence  LUMPAC
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号