Electron transfer processes between lanthanide activators are crucial for the functional behavior and performance of luminescent materials. Here, a multiconfigurational ab initio study reveals how direct metal-to-metal charge (MMCT) Eu2+ luminescence activator Ln3+ co-dopant (Ln3+ = Ce3+, Pr3+, Nd3+, Pm3+, Sm3+, Eu3+, Gd3+, Tb3+, Dy3+, Ho3+, Er3+, Tm3+, Yb3+) systematically dictates optical pro...

Despite of several advantages upconversion luminescence (UCL), their full potential is still not completely and commercially harnessed particularly in generating ultraviolet photon singular visible light. We have taken up this research problem to overcome the global material crisis tune color emission same materials. Here work, we designed Gd2Hf2O7 nanocrystals (NCs) co-doped them with Yb3+-Er3...