Tb3+ added sulfamic acid single crystals with optimal photoluminescence properties for opto-electric devices
| Autor: | Srinivasa Rao Valluru, B. Brahmaji, Ch. Satyakamal, T.K. Visweswara Rao, V. Veeraiah, S.K. Esub Basha, S. Rajyalakshmi, K. Ramachandra Rao |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Photoluminescence Band gap Materials Science (miscellaneous) Doping Analytical chemistry 02 engineering and technology Dielectric 021001 nanoscience & nanotechnology 01 natural sciences Electronic Optical and Magnetic Materials Biomaterials Crystal 0103 physical sciences Ceramics and Composites lcsh:TA401-492 lcsh:Materials of engineering and construction. Mechanics of materials Fourier transform infrared spectroscopy 0210 nano-technology Spectroscopy Single crystal |
| Zdroj: | Journal of Science: Advanced Materials and Devices, Vol 3, Iss 1, Pp 68-76 (2018) |
| ISSN: | 2468-2179 |
| Popis: | Terbium doped Sulfamic Acid (Tb3+:SA) single crystals were grown successfully by the slow evaporation solution (SEST) technique and the unidirectional method. The lattice parameters and the functional group were identified for the grown crystal by using single crystal X-ray diffraction and Fourier transform infra-red spectroscopy (FTIR), respectively. High resolution X-ray diffraction analysis (HRXRD) shows the crystalline perfection of the grown crystal. The optical transparency and band gap of the grown crystals were determined from UV-VIS spectroscopy. TG/DTA studies reveal that the grown crystals are thermally stable up to 190 °C. The frequency dependent dielectric properties were studied at different temperatures. Vickers micro hardness studies show that Tb3+:SA belongs to the class of soft materials. Second harmonic generation efficiency of Tb3+:SA is 3.7 times that of pure KDP. The photoluminescence emission and excitation studies of Tb3+:SA single crystals indicated the green emission at 543 nm, which is due to a transition from the 5D4 excited state to the 7F5 ground state. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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