How Quantum Dots Emit Light: Structure, Color Control, and Applications
Автор: eduvids
Загружено: 2025-11-10
Просмотров: 107
Описание: In this video we explore quantum dots—tiny semiconductor nanocrystals only a few nanometers across—and how their unique structure enables them to glow with vivid colors. You’ll learn how photons excite electrons within a quantum dot, how the electrons relax back to lower energy states, and why the emitted light’s wavelength is determined by the particle’s size. The discussion includes the relationship between quantum confinement and color, with examples ranging from a 2 nm dot that emits blue light to an 8 nm dot that produces red light. Real‑world applications are highlighted, such as quantum‑dot displays that deliver richer colors, biomedical imaging techniques that use their bright, tunable emission, and next‑generation solar cells that aim for higher efficiency. By the end of the video you’ll understand the physics behind quantum‑dot luminescence and how this property is being leveraged across multiple technologies.
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