Towards next generation white LEDs: optics-electronics synergistic effect in a single-layer heterophase halide perovskite

Article Chemistry, Multidisciplinary

High Color-Rendering Index and Stable White Light-Emitting Diodes by Assembling Two Broadband Emissive Self-Trapped Excitons

Zhuangzhuang Ma et al.

Summary: This study introduces a two-component strategy using two broadband emissive materials with self-trapped excitons (STEs) to produce high CRI and stable WLEDs. By synthesizing copper-based ternary halides composites, the research demonstrates cold/warm tunable WLEDs with high CRI and excellent stability. These results highlight the potential of using hybrids of STEs-derived broadband emissive materials for high-performance WLEDs.

ADVANCED MATERIALS (2021)

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Article Optics

Efficient and bright white light-emitting diodes based on single-layer heterophase halide perovskites

Jiawei Chen et al.

Summary: Halide perovskite LEDs are a new type of white light-emitting diode that utilizes efficient and low-cost lighting technologies, featuring a single broadband emissive layer without the need for phosphors. These LEDs operate with high peak luminance and external quantum efficiency, with potential for further improvements in the future through advancements in fabrication technology and mechanistic understanding.

NATURE PHOTONICS (2021)

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Article Chemistry, Physical

Utilization of Trapped Optical Modes for White Perovskite Light-Emitting Diodes with Efficiency over 12%

Ziming Chen et al.

Summary: The main challenges in the metal-halide-perovskite light-emitting diode (PeLED) field are low light extraction efficiency (LEE) and difficulty in achieving white emission. A high-performance white PeLED with enhanced LEE was successfully constructed by coupling a blue PeLED with a red perovskite nanocrystal (PeNC) down-converter through a multilayer semitransparent electrode. This approach not only improved LEE by over 50%, but also achieved a high external quantum efficiency and luminance, representing state-of-the-art results in the field.

JOULE (2021)

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Article Chemistry, Physical