Matlab 绘图中不出现线条

Question

我正在自学Matlab，我想创建一个电子浓度和反温度图，如图所示：

我在 matlab 中创建了一个代码，但我没有在图中看到该线。为什么？

% Constants
k = 1.38e-23;  % Boltzmann's constant (J/K)
Eg = 1.12;     % Energy band gap of silicon (eV)
A = 2.5e19;    % Constant for intrinsic carrier concentration calculation
Nc = 2.8e19;   % Effective density of states in conduction band (cm^-3)
Nd = 1e16;     % Doping concentration (cm^-3)

% Temperature range
T = linspace(100, 1000, 100);  % Temperature range from 100 K to 1000 K

% Electron concentration for n-type doping
n = (Nc * Nv)^0.5 * exp(-Eg./(2*k*T));

% Calculate ln(n)
ln_n = log(n);

% Calculate 1/T
inv_T = 1 ./ T;

% Plot
plot(inv_T, ln_n, 'r', 'LineWidth', 2);
xlabel('1/T');
ylabel('ln(N_D)');
title('ln(Electron Concentration) vs. 1/T for Silicon');
grid on;

有人知道吗？

Answer 1

您可以按如下方式绘制它：

k = 1.38e-23;  % Boltzmann's constant (J/K)
k = 8.6173303e-5; % Boltzmann's constant (eV/K)
Eg = 1.12;     % Energy band gap of silicon (eV)
A = 2.5e19;    % Constant for intrinsic carrier concentration calculation
Nc = 2.8e19;   % Effective density of states in conduction band (cm^-3)
Nd = 1e16;     % Doping concentration (cm^-3)

% Temperature range
T = linspace(100, 1000, 100);  % Temperature range from 100 K to 1000 K

% Electron concentration for n-type doping
n = (Nc * Nd)^0.5 * exp(-Eg./(2*k*T));

% Calculate ln(n)
ln_n = log(n);

% Calculate 1/T
inv_T = 1 ./ T;

% Plot
plot(inv_T, ln_n, 'r', 'LineWidth', 2);
xlabel('1/T');
ylabel('ln(N_D)');
title('ln(Electron Concentration) vs. 1/T for Silicon');
grid on;

您的图没有显示，因为该值太小，即零。您需要以

k

为单位使用

eV

。您还需要将

Nv

替换为

Nd

。附件是改变这两项之后的固有斜率图。