题目
EESM5200 (L2) Quiz 02
多重下拉选择题
The electric field along a PN junction under open circuit condition is given below. Indicate how the labelled points of the graph will change under when p-side (you have to figure out which is the p-side yourself) doping concentration increases. Point C: [ Select ] move left move right no horizontal movement Point D: [ Select ] move left move right no horizontal movement Point E: [ Select ] move up move down no vertical movement Slope S1: [ Select ] steeper gentler no change Slope S2: [ Select ] steeper gentler no change How would E move if an illumination is shine on the junction? move up
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标准答案
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思路分析
To tackle this PN-junction problem, I will analyze how each labeled feature would respond when the p-side doping concentration increases, and then relate those changes to the options provided.
First, consider what happens when the p-side is doped more heavily. A higher acceptor concentration on the p-side tends to increase the built-in potential across the junction and can alter the shape of the electric field distribution as the depletion region adjusts to maintain charge neutrality. This typically results in a shift of characteristic points along the x-axis (toward the p-side or n-side depending on the net field balance) and a change in the slope of the E-field curve where depl......Login to view full explanation登录即可查看完整答案
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类似问题
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Which of the following PN junction has the most asymmetric current with respect to forward and reverse bias?
You are given a PN junction where the with doping of NA=1017cm-3 and ND=2x1015cm-3. The band diagram of the PN junction at thermal equilibrium is given in the figure below.给你一个 PN 结，其中掺杂的 NA = 1017cm-3，ND = 2x1015cm-3。热平衡处 PN 结的能带图载于下图。 What is the carrier concentration at point "A" above the energy level ECn? (use scientific notation, e.g. 1e17 for 1017).高于能级 ECn 的 “a” 点的载流子浓度是多少？ (使用科学记数法，例如 1e17 表示 1017)。 [Fill in the blank], cm厘米-3 What is the carrier concentration at point "A" above the energy level ECp?在能级 ECp 以上的 “a” 点的载流子浓度是多少？ [Fill in the blank], cm厘米-3
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