Investigation of near-infrared luminescence in Er 3+ and Er 3+ /Yb 3+ co-doped ZnMgAl 10 O 17 phosphors Singh, Vijay ; Seshadri, M. ; Singh, N. ; Singh, Pramod K. ; Tiwari, Manoj K. ; Irfan, Muhammad Abstract Publication: Optik Pub Date: April 2018 DOI: 10.1016/j.ijleo.2017.12.205 Bibcode: 2018Optik.158.1283S