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=== Assistant: 当然可以 👍 === 当然可以 👍 下面我为你清晰画出并解释 肖特基接触 与 欧姆接触 的典型能带图。 我会用 ASCII 简图 + 文字说明(如果你想要图像化版本,我也可以帮你生成)。 ==== ### ==== 金属 和 n 型半导体 各自独立时: <syntaxhighlight>金属: 半导体: EFm EFs | | |<--- φm --->| |<--- χ + (Ec - EFs) --->| ______Ec (导带) ______Ef (费米能级) ______Ev (价带) </syntaxhighlight> * φₘ:金属功函数 * χ:半导体电子亲和势 * Ec–Ef:反映半导体掺杂浓度 ===== 当金属与 n 型半导体接触并达到'''费米能级平衡(EF 连平)'''后: ===== <syntaxhighlight>金属区 半导体区 EF ------------------------------ | / | / | / | / |________________/__________ ← Ec 上弯 ↑ ΦB (肖特基势垒) </syntaxhighlight> * 半导体一侧的导带上弯 → 表示形成耗尽层; * 电子必须克服势垒 ΦB 才能从半导体流向金属; * 反向偏压时,势垒更高 → 电流受阻; * 正向偏压时,势垒变低 → 电流增大。 📈 → 整流特性:I–V 呈指数单向导通 ==== ### ==== 若半导体掺杂极高 (n⁺),即使有势垒,也会因为耗尽层太薄而容易隧穿: <syntaxhighlight>金属区 半导体区 (n⁺) EF ------------------------------- | Ec |_______________________/ ↑ 极薄势垒 </syntaxhighlight> * 势垒宽度仅数纳米; * 电子通过量子隧穿轻松跨越; * 导电几乎线性。 📈 → I–V 呈直线关系(欧姆行为) ==== | | | | | ==== | --- | --- | --- | --- | | | | | | | | | | | ==== 我可以生成一张图形版能带图(包括肖特基接触的平衡态、正向偏压、反向偏压,以及欧姆接触), ==== 清晰显示导带弯曲、费米能级与电流方向。 是否希望我为你画出来? (可以选择:① 简洁对比图 或 ② 详细四图版)
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