Please use this identifier to cite or link to this item:
|Title:||Origin and Quenching of Novel ultraviolet and blue emission in NdGaO3: Concept of Super-Hydrogenic Dopants||Authors:||Ghosh S.
|Issue Date:||2016||Citation:||Ghosh S., Saha S., Liu Z., Motapothula M., Patra A., Yakovlev N., Cai Y., Prakash S., Huang X.H., Tay C.B., Cong C.X., Bhatt T., Dolmanan S.B., Chen J., Lü W., Huang Z., Tripathy S., Chua S.J., Yu T., Asta M., Ariando A., Venkatesan T. (2016). Origin and Quenching of Novel ultraviolet and blue emission in NdGaO3: Concept of Super-Hydrogenic Dopants. Scientific Reports 6 : 36352. ScholarBank@NUS Repository. https://doi.org/10.1038/srep36352||Abstract:||In this study we report the existence of novel ultraviolet (UV) and blue emission in rare-earth based perovskite NdGaO3 (NGO) and the systematic quench of the NGO photoluminescence (PL) by Ce doping. Study of room temperature PL was performed in both single-crystal and polycrystalline NGO (substrates and pellets) respectively. Several NGO pellets were prepared with varying Ce concentration and their room temperature PL was studied using 325 nm laser. It was found that the PL intensity shows a systematic quench with increasing Ce concentration. XPS measurements indicated that nearly 50% of Ce atoms are in the 4+ state. The PL quench was attributed to the novel concept of super hydrogenic dopant (SHD)", where each Ce4+ ion contributes an electron which forms a super hydrogenic atom with an enhanced Bohr radius, due to the large dielectric constant of the host. Based on the critical Ce concentration for complete quenching this SHD radius was estimated to be within a range of 0.85 nm and 1.15 nm whereas the predicted theoretical value of SHD radius for NdGaO3 is ?1.01 nm. © The Author(s) 2016.||Source Title:||Scientific Reports||URI:||https://scholarbank.nus.edu.sg/handle/10635/173979||ISSN:||20452322||DOI:||10.1038/srep36352|
|Appears in Collections:||Elements|
Show full item record
Files in This Item:
|10_1038_srep36352.pdf||2.06 MB||Adobe PDF|
checked on Oct 29, 2020
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.