caa a22 4500 445370041 CHVBK 20180317142943.0 cr unu---uuuuu 170323e20110901xx s 000 0 eng 10.1007/s00340-011-4673-2 doi (NATIONALLICENCE)springer-10.1007/s00340-011-4673-2 Photon avalanche upconversion and pump power studies in LaF3:Er3+/Yb3+ phosphor [Elektronische Daten] [A. Singh, K. Kumar, A. Pandey, O. Parkash, S. Rai, D. Kumar] Hexagonal LaF3:Er3+/Yb3+ phosphor material has been synthesized by chemical precipitation method to obtain high near-infrared to green upconversion (UC) efficiency. Its thermal, structural and fluorescence properties have been studied. UC emission bands have been observed up to 315 nm in UV region. The effect of input pump power on the intensities of various emission bands has been studied in detail and photon avalanche UC mechanism has been identified. On increasing the excitation power, some bands have shown saturation in intensity. Also, at higher pump intensities two new UC bands were observed and their origin has been discussed. The phosphor has also been tested for possible UC-based fingerprint detection. Springer-Verlag, 2011 Singh A. Department of Ceramic Engineering, IT, BHU, 221005, Varanasi, India aut Kumar K. Nanotechnology Application Center, Allahabad University, 211002, Allahabad, India aut Pandey A. Nanotechnology Application Center, Allahabad University, 211002, Allahabad, India aut Parkash O. Department of Ceramic Engineering, IT, BHU, 221005, Varanasi, India aut Rai S. Laser and Spectroscopy Lab., Physics Dept., BHU, 221005, Varanasi, India aut Kumar D. Department of Ceramic Engineering, IT, BHU, 221005, Varanasi, India aut Applied Physics B Springer-Verlag 104/4(2011-09-01), 1035-1041 0946-2171 104:4<1035 2011 104 340 https://doi.org/10.1007/s00340-011-4673-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00340-011-4673-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Singh A. Department of Ceramic Engineering, IT, BHU, 221005, Varanasi, India aut NATIONALLICENCE 700 1- Kumar K. Nanotechnology Application Center, Allahabad University, 211002, Allahabad, India aut NATIONALLICENCE 700 1- Pandey A. Nanotechnology Application Center, Allahabad University, 211002, Allahabad, India aut NATIONALLICENCE 700 1- Parkash O. Department of Ceramic Engineering, IT, BHU, 221005, Varanasi, India aut NATIONALLICENCE 700 1- Rai S. Laser and Spectroscopy Lab., Physics Dept., BHU, 221005, Varanasi, India aut NATIONALLICENCE 700 1- Kumar D. Department of Ceramic Engineering, IT, BHU, 221005, Varanasi, India aut NATIONALLICENCE 773 0- Applied Physics B Springer-Verlag 104/4(2011-09-01), 1035-1041 0946-2171 104:4<1035 2011 104 340 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer