Effect of growth temperatures on the structural and optical properties of bulk tris-(8-hydroxyquinoline) aluminium (III)
Bulk samples of Tris (8-hydroxyquinoline) aluminium (Alq 3 ) were prepared using wet synthesis method followed by annealing at 50 °C, 100 °C, 150 °C and 200 °C for 2 h. X ray diffraction pattern showed the formation of Alq 3 crystal which is constituted of Al atom, anions of 8-hydroxyquinoline (8-Hq...
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Published in | Applied physics. A, Materials science & processing Vol. 130; no. 5 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Berlin/Heidelberg
Springer Berlin Heidelberg
01.05.2024
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | Bulk samples of Tris (8-hydroxyquinoline) aluminium (Alq
3
) were prepared using wet synthesis method followed by annealing at 50 °C, 100 °C, 150 °C and 200 °C for 2 h. X ray diffraction pattern showed the formation of Alq
3
crystal which is constituted of Al atom, anions of 8-hydroxyquinoline (8-Hq) and porous Al
2
O
3
–Al(OH)
3
. structure. The spectra of FTIR (Fourier-transform infrared) reveals that annealing Alq
3
at 50 °C reduces the C=C peak to negligible but reappears when annealed at 150 °C. FESEM on as-prepared Alq
3
shows hexagonal rod shaped stacked structures which on annealing at 50 °C changes to tetragonal agglomerated grains along with appearance of oval and circular shaped pores on it. From fluorescence spectroscopy it is found that the peak intensity changes non-monotonically with annealing temperatures followed by red shift and blue shift of peak maximum at 150 °C and 200 °C respectively. The temperature dependent change in the properties are mainly attributed to the onset of hydrolysis in Alq
3
and change in the electronic transition levels. |
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ISSN: | 0947-8396 1432-0630 |
DOI: | 10.1007/s00339-024-07461-3 |