Why It Was Almost Impossible to Make the Blue LED

延伸阅读 1

蓝色 LED 所需的氮化镓不仅要长得好，还要让掺入镁的材料提供空穴。节目解释了氢如何妨碍这一点，也比较了只能处理浅表的电子束与可扩大处理范围的加热步骤。

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only made the surfaces of the samples p-type

these hydrogen atoms were sneaking in and bonding with the magnesium