GaN nanophosphors for white-light applications

Single-Crystalline ZnO/Graphene Quantum Dots Phosphors-Converted White Light-Emitting Diodes

“…However, conventional pc-LED performance has also been limited by phosphors embedded in epoxies and resins, which degrades under the operation of high irradiation intensities and high temperature, thus reducing the efficiency and color rendering with time [3]. Moreover, the rare earth free phosphors are also in demand for environmental prospective [4], [5]. To resolve this issue, single-crystalline phosphors (SCPs) have become an inevitable demand for the next generation white solid state lighting, which is an alternative to conventional ceramic powder phosphors (CPPs) and avoids the use of resins [6].…”

GaN phosphors converted white light‐emitting diodes for high luminous efficacy and improved thermal stability

“…White light-emitting GaN nanoparticles were synthesised by the methodology proposed in our earlier work by tuning the mid-gap states through a variety of different experimental processes [3]. Synthesis of GQDs performed by the microwave-assisted hydrothermal method through the dehydration of glucose [12].…”

“…Out of all the methods to generate white light, the method involving ultraviolet (UV) excitation of phosphors is found to be most suitable from technological and physical point of view for maintaining stable colour rendering index (CRI) and high luminous efficacy (luminous efficacy of radiation (LER)) over time along and uniform excitation for every visible band [1]. Additionally, to resolve the energy crisis and to address the environmental concerns, rare-earth-free solid-state lighting is also in demand with different types of nanostructures [2][3][4][5][6][7]. YAG based and singlecrystalline phosphors might be able to fulfil the criteria, however, these alternatives have a limitation of low CRI and complex growth process, respectively [8,9].…”

“…In this context, GaN nanoparticles and quantum dots have been explored for generating visible light using a complex process by doping of rare-earth elements and surface modifications, respectively [10,11]. Recently, our earlier study demonstrated an easy process to initiate white-light emission from intrinsic GaN nanoparticles by carbothermal nitridation of Ga 2 O 3 with the tuning of most prominent yellow and blue bands [3]. This study reveals the potentials of GaN phosphors and established them as a potential contender for future generation white solid-state lighting applications.…”