[en] Recently, reduced graphene oxide (rGO) has emerged as a potential candidate of exotic carbon materials family with augmented performance in electronic and optoelectronic devices. Herein, we demonstrated an highly-efficient and novel inorganic electro luminescent device geometry, where a new phosphor composite named reduced graphene oxide wrapped ZnS: Cu, Al acts as an active emitting layer and an exfoliated hexagonal boron nitride (h-BN) as a dielectric layer 1. The major roles of rGO in the active layer as a conductive support and local electric field enhancing agent because its wrinkles are unraveled by comparing with other carbon exotic nano forms such as carbon nanotubes, graphite, charcoal, and activated carbon, which significantly improves the brightness of the device. This new and facile strategy to make the luminescent devices could be a paradigm shift in the cost effective, highly stable in air for several days and energy efficient next generation display devices. (author)