Samarium doped ZnO nanofibers for designing orange - red light emitting fabrics

Publication date: 2019Source: Materials Today: Proceedings, Volume 15, Part 3Author(s): Chaitali N. Pangul, Shyamkant W. Anwane, Subhash B. KondawarAbstractIn this paper, we report the orange - red luminescence from samarium doped ZnO nanofibers fabricated by Electrospinning. The as-prepared samarium doped ZnO nanofibers was examined by XRD, SEM-EDX, UV-VIS and FTIR characterizations. XRD revealed the presence of sharp peaks of ZnO in agreement with hexagonal wurtzite ZnO peaks. SEM explored the formation of ultralong smooth nanofibers. EDX revealed the presence of Zn, O and Sm peaks confirms the formation of samarium doped ZnO nanofibers. The band gap energy of samarium doped ZnO nanofibers was found to be increasing from 3.7 eV to 3.8 eV with increase in concentration of dopant as computed by UV-Vis spectroscopy. An eminent stretching bond of Zn-O was observed in prepared nanofibers by FTIR spectroscopy. A very bright orange-red luminescence was observed upon excitation at 394nm in photoluminescence study of samarium doped ZnO nanofibers. The resulting luminescence is result of two prominent peaks due to magnetically allowed transition 4G5/2 → 6H7/2 and electrically forced transition 4G5/2 → 6H9/2. These are the distinctive peaks of dopant Sm3+ ions. It is interesting to see the luminescence is from dopant while the host’s defect luminescence is latent. This disguised the operative energy transfer from host ZnO to dopant Sm3+ ion. From the colour parameters calculated...
Source: Materials Today: Proceedings - Category: Materials Science Source Type: research