Tuning the color purity of LaAlO₃:Eu³⁺ red phosphor by the cross relaxation

Abstract

Precisely adjusting the color purity of LaAlO₃:Eu³⁺ red phosphor with 593 and 618 nm emissions is achieved in a strategy of suppressing transitions of high energy levels of Eu³⁺ ions through varying the doping concentration. As the doping concentration increases, the transitions from high levels ⁵D_3,2,1 will be weakened, while those from ⁵D₀ are enhanced up to a critical value with the aid of the cross relaxation. As a result, an increase of the color purity from 95.2% to 97.4% is obtained. It indicates that the red phosphor could be one of the excellent red-light-emitting phosphors in illuminating and display devices.

Keywords

Doping Concentration / Apply Physic Letter / High Energy Level / Color Purity / Cross Relaxation

References

[1] FeldmannC., JustelT., RondaC. R., SchmidtP. J.. Advanced Functional Materials, 2003, 13: 511

[2] ChiappiniA., ArmelliniC., ChiaseraA., JestinY., FelrariM., MattarelliM., MontagnaM., MoserE., ToselloC., ZampedriL., Nunzi ContiG., PelliS., AlmeidaR. M., RighiniG. C.. Optoelectronics Letters, 2007, 3: 184

[3] LiuL. Y., WangD. J., MaoZ. Y., LiuY. H., LiX. Z., LuQ. F.. Optoelectronics Letters, 2009, 5: 26

[4] WangZ. L., LiangH. B., WangJ., GongM. L., SuQ.. Applied Physics Letters, 2006, 89: 071921

[5] ZhaoX. X., WangX. J., ChenB. J., MengQ. Y., DiW. H.. Optical Materials, 2007, 29: 1680

[6] JingX., IrelandT., GibbonsC., BarberD. J., SilverJ., VechtA., FernG., TrowgaP., MortonD. C.. Journal of the Electrochemical Society, 1999, 146: 4654

[7] KangM., LiaoX. M., KangY. Q., LiuJ., SunR., YingG. F., HuangZ. B., YaoY. D.. Journal of Materials Science, 2009, 44: 2388

[8] SunX. D., XiangX. D.. Applied Physics Letters, 1998, 72: 525

[9] SungH. J., ChoY. S., HuhY. D., DoY. R.. Bulletin of the Korean Chemical Society, 2007, 28: 1280

[10] PiaoX., HorikawaT., HanzawaH., MachidaK.. Applied Physics Letters, 2006, 88: 161908

[11] UhedaK., HirosakiN., YamamotoH.. Physica Status Solidi a-Applications and Materials Science, 2006, 203: 2712

[12] XiaY. J., HuangF. Q., WangW. D., WangY. M., YuanK. D., LiuM. L., ShiJ. L.. Optical Materials, 2008, 31: 311

[13] MurataT., TanoueT., IwasakiM., MorinagaK., HaseT.. Journal of Luminescence, 2005, 114: 207

[14] Le ToquinR., CheethamA. K.. Chemical Physics Letters, 2006, 423: 352

[15] XiaoX. Z., YanB.. Journal of Alloys and Compounds, 2008, 456: 447

[16] EkambaramS.. Journal of Alloys and Compounds, 2005, 390: L7

[17] MaoZ. Y., WangD. J., LuQ. F., YuW. H., YuanZ. H.. Chemical Communications, 2009, 3: 346

[18] HreniakD., StrekW., DerenP., BednarkiewiczA., LukowiakA.. Journal of Alloys and Compounds, 2006, 408: 828

[19] ValiR.. Computer Material Science, 2008, 44: 779