Observation of bright green luminescence in an Eu2+ complexed graphene oxide composite through reduction of Eu3+†
Abstract
Red light harvesting with Eu3+ graphene complexes are well known in the literature. But embedding Eu2+ in a graphene oxide matrix is a difficult proposition and could be of paramount interest because of emission tunability. Herein, we report the observation of highly visible green luminescence for Eu2+ which occurs due to the transition between the 4f7 (8S7/2) ground state and the 4f6 5d excited state with nanosecond time decay through reduction of Eu3+ using a simple chemical approach. This newly formed luminescence complex may be used as a major potential candidate for application in optoelectronics and nanobiotechnology.