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什么是 LED 芯片

贺拉斯-贺

最後更新:2023年12月26日

什么是 LED 芯片

LED 芯片又称 LED 芯片,是一种小型半导体器件,是 LED 的核心部件。它负责将电能转换成光能。LED 芯片由半导体材料构成,通常是砷化镓(GaAs)或氮化镓(GaN),掺入杂质后可产生所需的电气特性。

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当向 LED 芯片施加电流时,电流会通过一个 PN 結它由两种不同类型的半导体材料结合而成。在 PN 结处,电子和空穴重新结合,以光子(即光粒子)的形式释放能量。这一过程被称为电致发光。

LED 芯片有多种颜色,包括红色、绿色、蓝色和白色。LED 芯片发出的光的颜色由 PN 结中使用的材料决定。例如,蓝色 LED 芯片通常与黄色荧光粉结合使用,以产生白光。这些芯片通常安装在基板上,例如 PCB然后封装在保护性外壳或封装中。封装不仅能保护 LED 芯片免受物理和化学损伤,还能提供机械、电气、热和光学支持。

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LED 芯片决定着 LED 照明系统的质量和性能。这些因素包括 亮度在评判 LED 芯片的质量时,要对 LED 的色准和效率进行评估。此外,LED 芯片还可根据用途、颜色、形状和尺寸等各种因素进行分类。

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