Dazzling red emission from TiO2 nanoparticles impregnated co-doped Gd3++Eu3+: PVA polymer nanocomposites for photonic applications

다국어 초록 (Multilingual Abstract)

Red emission was obtained from rare earth doped polymer nanocomposites, namely, composites ofpolyvinyl-alcohol (PVA) co-doped with Gd3+ and Eu3+ and embedded with TiO2 nanoparticles (TiO2NP),under ultraviolet (UV) excitation. We successfully synthesized Eu3+: PVA, Gd3+: PVA, (Gd3+ + Eu3+): PVA,and (Gd3+ + Eu3+ + TiO2NP): PVAfilms by solution casting method. From X-ray diffraction patterns andFourier-transform infrared spectral profiles, the structural details of thefilms and the ion–polymerinteraction mechanism responsible for their formation were systematically analyzed. The thermalstability and decomposition dynamics of the prepared samples were evaluated by thermogravimetry anddifferential thermal analysis. Pertinent optical absorption bands related to Eu3+ and Gd3+ ions in thepolymer composites were observed and assigned to the corresponding electronic transitions. The PVAfilm containing different concentrations of the Eu3+ dopant displayed red emission at 618 nm (5D0!7F2)under UV excitation at 396 nm (7F0!5L6). Upon co-doping with Gd3+ to form the (Gd3+ + Eu3+): PVAfilm,it exhibited red emission that was stronger than that from the singly doped Eu3+: PVAfilm under 270 nmexcitation because of the energy transfer from Gd3+ to Eu3+ ions. After the TiO2 nanoparticles were evenlydispersed in the co-doped (Gd3+ + Eu3+): PVAfilms, the photoluminescence properties were remarkablyenhanced and prominent red emission was observed under 274 nm excitation. The red emission of Eu3+was significantly enhanced through an efficient energy-transfer process from the Gd3+ ions to Eu3+ ionsand from the TiO2 nanoparticles to Eu3+ ions. A possible energy-transfer mechanism was clearlydemonstrated by severalfluorescent methods and lifetime decay dynamics. Based on the above results,these polymer compositefilms are promising candidates for red luminescent photonic devices.

참고문헌 (Reference)

1 A. J. Kenyon, 26 : 225-, 2002

2 B. Han, 104 : 241-, 2011

3 Cid B. de Araujo, 99 : 123522-, 2006

4 Mohamed Gouda, 1 : 29-, 2012

5 Cheng-Ming Tang, 8 : 4895-, 2015

6 R. Ricciardi, 37 (37): 1921-, 2004

7 Eun Joo Shin, 123 : 672-, 2012

8 X. Qi, 2 : 2240-, 2014

9 A. A. R. de Oliveira, 12 (12): 239-, 2009

10 Xin Huang, 3 : 1600-, 2011

11 Taymour A. Hamdalla, 127 : 878-, 2016

12 M. Z. Kassaee, 22 : 11-, 2011

13 Keqing Zhou, 2 : 11695-, 2012

14 S. Ramesh, 99 : 41-, 2001

15 A. Y. Shaulov, 403 : 154-, 2005

16 S. K. Sharma, 17 : 29201-, 2015

17 Y. Pavani, 52 : 1685-, 2012

18 H. M. Zidan, 88 : 104-, 2003

19 Yasutaka Kondo, 27 : 1438-, 2005

20 Wei-Ren Liu, 18 (18): 2946-, 2009

21 N. Vijaya, 1036 : 42-, 2013

22 Guang Xiong, 18 : 190-, 2016

23 Ernesto Brunet, 1 (1): 11-, 2007

24 V. A. G. Rivera, 33 : 888-, 2011

25 L. H. Slooff, 91 : 3955-, 2002

26 A. K. Adiyodi, 1 (1): 281-, 2007

27 Mengmeng Shang, 43 : 1372-, 2014

28 G. Kaur, 43 : 11014-, 2014

29 R. T. Wegh, 56 : 13841-, 1997

30 Yu-Chun Li, 111 : 10682-, 2007

31 G. N. Hemantha Kumar, 45 : 5407-, 2004

32 M. Abdelaziz, 405 : 958-, 2010

33 Andreas Herrmann, 37 : 293-, 2014

34 Kaushik Biswas, 39 : 153-, 2015

35 Mengjiao Xu, 146 : 475-, 2014

36 B. Liu, 148 : 158-, 2005

37 K. Vanheusden, 79 : 7983-, 1996

38 J. G. Yu, 334 : 58-, 2009

39 A. Conde-Gallardo, 78 : 3436-, 2001

40 Takashi Tachikawa, 47 : 5348-, 2008

41 Qian Wang, 28 (28): 487-, 2015

42 B. P. Singh, 43 : 4779-, 2014

43 Su Yeon Kim, 7866 (7866): 1-, 2015

44 A. Bahadur, 118 : 177-, 2014

45 Barbara Szpikowska-Sroka, 154 : 290-, 2014

46 Yunhua Han, "Controlled synthesis and luminescence properties of doped NaLa(WO4)2 microstructures" 한국공업화학회 34 : 269-277, 2016