Effect of Surface Modification on the Absorption and Luminescence Response in tris(8-Hydroxyquinoline) Gallium Films Achieved by Thermal Treatment
DOI:
https://doi.org/10.6000/2369-3355.2015.02.02.3Keywords:
Gaq3, thermal treatment, FESEM, XRD, morphologyAbstract
This work reports on the impact of surface modification on the optical absorption and luminescence response of vacuum deposited tris(8-hydroxyquinoline) gallium (Gaq3) films. This surface modification was achieved by means of thermal treatment under nitrogen gas in the temperature range from 85 oC to 255 oC. The results of field emission scanning electron microscopy (FESEM) and x-ray diffraction (XRD) technique ascertained the formation of amorphous nano-rods along the surface of Gaq3 films. Considerable improvement in the absorption and luminescence characteristics of Gaq3 films was observed upon surface modification, which has been resulted from this treatment process.
References
Kao P-C, Chu S-Y, Huang H-H, Tseng Z-L, Chen Y-C. Improved efficiency of organic photovoltaic cells using tris (8-hydroxy-quinoline) aluminum as a doping material. Thin Solid Films 2009; 517: 5301-4. http://dx.doi.org/10.1016/j.tsf.2009.03.147 DOI: https://doi.org/10.1016/j.tsf.2009.03.147
Vivo P, Jukola J, Ojala M, Chukharev V, Lemmetyinen H. Influence of Alq3/Au cathode on stability and efficiency of a layered organic solar cell in air. Solar Energy Materials and Solar Cells 2008; 92: 1416-20. http://dx.doi.org/10.1016/j.solmat.2008.06.002 DOI: https://doi.org/10.1016/j.solmat.2008.06.002
Muhammad FF. Design approaches to improve organic solar cells. Journal of Technology Innovations in Renewable Energy 2014; 3: 1-8. http://dx.doi.org/10.6000/1929-6002.2014.03.02.4 DOI: https://doi.org/10.6000/1929-6002.2014.03.02.4
Mohd Sarjidan MA, Basri SH, Za’Aba NK, Zaini MS, Abd Majid WH. Electroluminescence and negative differential resistance studies of TPD:PBD:Alq3 blend organic-light-emitting diodes. Bull Mater Sci 2015; 38: 235-9. http://dx.doi.org/10.1007/s12034-014-0807-6 DOI: https://doi.org/10.1007/s12034-014-0807-6
Wang L, Jiang X, Zhang Z, Xu S. Organic thin film electroluminescent devices using Gaq3 as emitting layers. Displays 2000; 21: 47-9. http://dx.doi.org/10.1016/S0141-9382(00)00035-4 DOI: https://doi.org/10.1016/S0141-9382(00)00035-4
Gahungu G, Zhang J. Molecular geometry, electronic structure and optical properties study of meridianal tris(8-hydroxyquinolinato) gallium(III) with ab initio and DFT methods. Journal of Molecular Structure: THEOCHEM 2005; 755: 19-30. http://dx.doi.org/10.1016/j.theochem.2005.06.017 DOI: https://doi.org/10.1016/j.theochem.2005.06.017
Zhang J, Frenking G. Quantum chemical analysis of the chemical bonds in Mq3 (M = AlIII, GaIII) as emitting material for OLED. Chem Phys Lett 2004; 394: 120-5. http://dx.doi.org/10.1016/j.cplett.2004.06.074 DOI: https://doi.org/10.1016/j.cplett.2004.06.074
Hernández I, Gillin WP. Influence of high hydrostatic pressure on Alq3, Gaq3, and Inq3 (q = 8-hydroxyquinoline). J Phys Chem B 2009; 113: 14079-86. http://dx.doi.org/10.1021/jp905108x DOI: https://doi.org/10.1021/jp905108x
Muhammad FF, Abdul Hapip AI, Sulaiman K. Study of optoelectronic energy bands and molecular energy levels of tris (8- hydroxyquinolinate) gallium and aluminum organometallic materials from their spectroscopic and electrochemical analysis. J Organometallic Chem 2010; 695: 2526-31. http://dx.doi.org/10.1016/j.jorganchem.2010.07.026 DOI: https://doi.org/10.1016/j.jorganchem.2010.07.026
Singh R, Kumar J, Singh RK, Kaur A, Sood KN, Rastogi RC. Effect of thermal annealing on surface morphology and physical properties of poly(3-octylthiophene) films. Polymer 2005; 46: 9126-32. http://dx.doi.org/10.1016/j.polymer.2005.07.032 DOI: https://doi.org/10.1016/j.polymer.2005.07.032
Satapathy S, Pawar S, Gupta PK, Varma KBR. Effect of annealing on phase transition in poly(vinylidene fluoride) films prepared using polar solvent. Bull Mater Sci 2011; 34: 727-33. http://dx.doi.org/10.1007/s12034-011-0187-0 DOI: https://doi.org/10.1007/s12034-011-0187-0
Somashekar R, Gopalkrishna Urs R. Effect of annealing on crystal size in pure Mysore silk fibres. Bull Mater Sci 1991; 14: 87-91. http://dx.doi.org/10.1007/BF02745093 DOI: https://doi.org/10.1007/BF02745093
Cho C-P, Yu C-Y, Perng T-P. Growth of AlQ3 nanowires directly from amorphous thin film and nanoparticles. Nanotechnology 2006; 17: Effect of Surface Modification on the Absorption and Luminescence Response 55 5506-10. http://dx.doi.org/10.1088/0957-4484/17/21/035 DOI: https://doi.org/10.1088/0957-4484/17/21/035
Kumar P, Sonia, Patel RK, Prakash C, Goel TC. Effect of substrates on phase formation in PMN-PT 68/32 thin films by sol–gel process. Mater Chem Phys 2008; 110: 7-10. http://dx.doi.org/10.1016/j.matchemphys.2007.11.035 DOI: https://doi.org/10.1016/j.matchemphys.2007.11.035
Yu Y-W, Cho C-P, Perng T-P. Crystalline Gaq3 nanostructures: preparation, thermal property and spectroscopy characterization. Nanoscale Res Lett 2009; 4: 820-7. http://dx.doi.org/10.1007/s11671-009-9321-y DOI: https://doi.org/10.1007/s11671-009-9321-y
Higginson KA, Zhang X-M, Papadimitrakopoulos F. Thermal and morphological effects on the hydrolytic stability of aluminum tris(8- hydroxyquinoline) (Alq3). Chem Mater 1998; 10: 1017-20. http://dx.doi.org/10.1021/cm970599a DOI: https://doi.org/10.1021/cm970599a
Yokoyama D, Sakaguchi A, Suzuki M, Adachi C. Horizontal orientation of linear-shaped organic molecules having bulky substituents in neat and doped vacuum-deposited amorphous films. Organic Electronics 2009; 10: 127-37. http://dx.doi.org/10.1016/j.orgel.2008.10.010 DOI: https://doi.org/10.1016/j.orgel.2008.10.010
Muhammad FF, Sulaiman K. Utilizing a simple and reliable method to investigate the optical functions of small molecular organic films - Alq3 and Gaq3 as examples. Measurement 2011; 44: 1468-74. http://dx.doi.org/10.1016/j.measurement.2011.05.017 DOI: https://doi.org/10.1016/j.measurement.2011.05.017
Djuri i AB, Lau TW, Lam LSM, Chan WK. Influence of atmospheric exposure of tris (8-hydroxyquinoline) aluminum (Alq3): a photoluminescence and absorption study. Appl Phys A: Mater Sci Process 2004; 78: 375-80. http://dx.doi.org/10.1007/s00339-002-1915-5 DOI: https://doi.org/10.1007/s00339-002-1915-5
Credo GM, Winn DL, Buratto SK. Near-field scanning optical microscopy of temperature- and thickness-dependent morphology and fluorescence in Alq3 films. Chem Mater 2001; 13: 1258-65. http://dx.doi.org/10.1021/cm000672o DOI: https://doi.org/10.1021/cm000672o
Brinkmann M, Gadret G, Muccini M, Taliani C, Masciocchi N, Sironi A. Correlation between molecular packing and optical properties in different crystalline polymorphs and amorphous thin films of merTris(8-hydroxyquinoline)aluminum(III). J Am Chem Soc 2000; 122: 5147-57. http://dx.doi.org/10.1021/ja993608k DOI: https://doi.org/10.1021/ja993608k
Auzel F, Baldacchini G, Baldacchini T, Chiacchiaretta P, Balaji Pode R. Rayleigh scattering and luminescence blue shift in tris(8- hydroxyquinoline) aluminum films. J Luminescence 2006; 119-120: 111-5. http://dx.doi.org/10.1016/j.jlumin.2005.12.018 DOI: https://doi.org/10.1016/j.jlumin.2005.12.018
Hernández I, Gillin WP, Somerton M. Spectroscopic study of Mq3 (M=Al, Ga, In, q=8-hydroxyquinolinate) at high pressure. J Luminescence 2009; 129: 1835-9. http://dx.doi.org/10.1016/j.jlumin.2009.02.030 DOI: https://doi.org/10.1016/j.jlumin.2009.02.030
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