Perovskite LEDs
Context:
Researchers at CeNS, Bengaluru, have developed a new method to improve Perovskite LED durability by minimising anion migration and also to address the moisture sensitivity and colour instability issues.
Relevance:
GS-03 (Science and technology)
What are Perovskite LEDs (PeLEDs)?
- PeLEDs are a type of light-emitting diode that use perovskite nanocrystals (materials with the same crystal structure as calcium titanate, CaTiO₃).
- They combine properties of both OLEDs (organic LEDs) and QLEDs (quantum dot LEDs), offering superior performance in display and lighting applications.
- Previous PeLEDs were very sensitive to heat, moisture, and ion migration. This usually led to colour instability and reduced lifespan. However, the new stabilisation method by CeNS makes these PeLEDs more viable for future optoelectronic applications.
Advantages Compared to Normal LEDs:
- Better Colour Purity: Offers more vibrant and precise colours than traditional LEDs.
- Higher Efficiency: Capable of converting more energy into light, reducing power consumption.
- Lower Manufacturing Costs: Easier to produce using solution-based techniques.
- Flexible & Lightweight: Can be applied to bendable or transparent displays.
- Customisable Emission: Tunable across different wavelengths for various lighting needs.
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