2016/08/31 by Golam Haider, Muhammad Usman, Tzu-Pei Chen +3 · 1 voice · 1 citation
Chemistry · Materials Science · #Metal-Organic Frameworks: Synthesis and Applications #Nanocluster Synthesis and Applications #Luminescence and Fluorescent Materials
paper · doi:10.1021/acsnano.6b03030
openalex publication_date 2016/08/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/06/27
Light-emitting diodes (LEDs) have drawn tremendous potential as a replacement of traditional lighting due to its low-power consumption and longer lifetime. Nowadays, the practical white LEDs (WLED) are contingent on the photon down-conversion of phosphors containing rare-earth elements, which limits its utility, energy, and cost efficiency. In order to resolve the energy crisis and to address the environmental concerns, designing a direct WLED is highly desirable and remains a challenging issue. To circumvent the existing difficulties, in this report, we have designed and demonstrated a direct WLED consisting of a strontium-based metal-organic framework (MOF), [Sr(ntca)(H2O)2]·H2On (1), graphene, and inorganic semiconductors, which can generate a bright white light emission. In addition to the suitable design of a MOF structure, the demonstration of electrically driven white light emission based on a MOF is made possible by the combination of several factors including the unique properties of graphene and the appropriate band alignment between the MOF and semiconductor layer. Because electroluminescence using a MOF as an active material is very rare and intriguing and a direct WLED is also not commonly seen, our work here therefore represents a major discovery which should be very useful and timely for the development of solid-state lighting.