Metal halide perovskites-based white light-emitting diodes

Bright light-emitting diodes based on organometal halide perovskite.

Solid-state light-emitting devices based on direct-bandgap semiconductors have, over the past two decades, been utilized as energy-efficient sources of lighting. However, fabrication of these devices typically relies on expensive high-temperature and high-vacuum processes, rendering them uneconomical for use in large-area displays. Here, we report high-brightness light-emitting diodes based on ...

ZnO - Based Light - Emitting Diodes

Light Converting Inorganic Phosphors for White Light-Emitting Diodes

White light-emitting diodes (WLEDs) have matched the emission efficiency of florescent lights and will rapidly spread as light source for homes and offices in the next 5 to 10 years. WLEDs provide a light element having a semiconductor light emitting layer (blue or near-ultraviolet (nUV) LEDs) and photoluminescence phosphors. These solidstate LED lamps, rather than organic light emitting diode ...

Color-Pure Violet-Light-Emitting Diodes Based on Layered Lead Halide Perovskite Nanoplates.

Violet electroluminescence is rare in both inorganic and organic light-emitting diodes (LEDs). Low-cost and room-temperature solution-processed lead halide perovskites with high-efficiency and color-tunable photoluminescence are promising for LEDs. Here, we report room-temperature color-pure violet LEDs based on a two-dimensional lead halide perovskite material, namely, 2-phenylethylammonium (C...

InP-Based Cylindrical Microcavity Light-Emitting Diodes

We have investigated the properties of InP-based microcavity light-emitting diodes ( = 1 6 m). Our objective was mainly to study the effects of lateral confinement of optical modes, which was achieved by the wet oxidation of double In0 52Al0 48As layers. The smallest devices had a cavity radius of 0.5 m, which becomes comparable to where is the effective refractive index of the photon emitting ...