Reduced graphene oxide enwrapped phosphors for long-term thermally stable phosphor converted white light emitting diodes.

ABSTRACT: The long-term instability of the presently available best commercial phosphor-converted light-emitting diodes (pcLEDs) is the most serious obstacle for the realization of low-cost and energy-saving lighting applications. Emission from pcLEDs starts to degrade after approximately 200 h of operation because of thermal degradation of the phosphors. We propose a new strategy to overcome this thermal degradation problem of phosphors by wrapping the phosphor particles with reduced graphene oxide (rGO). Through the rGO wrapping, we have succeeded in controlling the thermal degradation of phosphors and improving the stability of fabricated pcLEDs. We have fabricated pcLEDs with long-term stability that maintain nearly 98% of their initial luminescence emission intensity even after 800 h of continu

SUBMITTER: Anoop G 

PROVIDER: S-EPMC5037423 | biostudies-literature | 2016 Sep

REPOSITORIES: biostudies-literature