, Power dependent upconversion in Er3+ /Yb3+ co-doped BiNbO4 phosphors

Ceramics International (2016) (accepted)

A. J. M. Sales, D. G. Sousa, H. O. Rodrigues, M. M. Costa, A. S. B. Sombra, F.N.A. Freire, M.J. Soares, M.P.F. Graça, J. Suresh Kumar