1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
steposvetlana [31]
1 year ago
13

Find the electron and hole concentrations and fermi level in silicon at 300 k for boron

Physics
1 answer:
gogolik [260]1 year ago
4 0

To find the electron and hole concentrations and fermi levels in silicon at 300 k for boron, fermi level is 9.3 x 10^4 cm^-3.

<h3>Calculation and Explanation</h3>

Ionization energy for boron in Si, 0.045 eV

Fermi level in silicon,

300 K at 10^{15} cm^{-3} (Boron atoms)

All boron impurities are ionized, 300K

Electron, hole concentrations and Fermi levels is found out,

The value of Na = 10^{15} cm^{-3}

np = \frac{ni^2}{nA}

np = \frac{(9.65 x 10^9)^2}{10^15}

np= 9.3 x 10^4 cm^-3

Fermi level is calculated,

Ef - Ev = kT ln(NV/ND)

value of kT = 0.0259 eV (300° K)

So, substitution the values

Ef - Ev = kT ln(NV/ND)

Ef - Ev = 0.0259ln (2.66 x 10^{19} / 10^{15} )

Ef - Ev = 0.0259ln (26600)

Ef - Ev = 0.0259 x 10.18

Ef - Ev = 0.263 eV

What is ionization energy?

Ionization energy, also known as ionization energy (IE) or ionization energy (British English spelling), is the minimal amount of energy needed to free the most loosely bonded electron from an isolated gaseous atom, positive ion, or molecule in physics and chemistry.

To know more about ionization energy, visit:

brainly.com/question/16243729

#SPJ4

You might be interested in
A car accelerates at a rate of 13m/s^2[S]. If the car's initial velocity is 120km/h[N]. What will be its final velocity in m/s,
balu736 [363]

Answer:

the final velocity of the car is 59.33 m/s [N]

Explanation:

Given;

acceleration of the car, a = 13 m/s²

initial velocity of the car, u = 120 km/h = 33.33 m/s

duration of the car motion, t = 2 s

The final velocity of the car in the same direction is calculated as follows;

v = u + at

where;

v is the final velocity of the car

v = 33.33 + 13 x 2

v = 59.33 m/s [N]

Therefore, the final velocity of the car is 59.33 m/s [N]

4 0
3 years ago
Emeka carried out a reaction in which a gas was given off. He followed the progress of the reaction by measuring the mass of the
pickupchik [31]

Answer:

17.5

or

1.1 g/min

I know it's one of these, try getting a second opinion

6 0
2 years ago
A charge of 24 C pass a certain point in a conductor in 10 s. What is the size of current in the conductor?
allsm [11]

Answer:

write the name of any five districts of nepal

6 0
2 years ago
Read 2 more answers
A 400g sample of water absorbs 500j of energy. how did the water temperature change if the specific heat of water is 4.18j/g©. S
Mashutka [201]

In general, the quantity of heat energy, Q, required to raise a mass m kg of a substance with a specific heat capacity of <span>c </span>J/(kg °C), from temperature t1 °C to t2 °C is given by:

<span>Q </span>= <span>mc(t</span><span>2 </span><span>– t</span>1<span>) joules</span>

<span>So:</span>

(t2-t1) =Q / mc

<span>As we know:
Q = 500 J </span>

<span>m = 0.4 kg</span>

<span>c = 4180 J/Kg </span>°c

<span>We can take t1 to be 0</span>°c

t2 - 0 = 500 / ( 0.4 * 4180 )

t2 - 0 = 0.30°c

6 0
3 years ago
How did you know if an electric current is<br> flowing in a lightbulb?
sweet [91]

Answer:

if it lights up

Explanation:

electricity

7 0
3 years ago
Other questions:
  • Which statement correctly describes momentum? It is a scalar quantity because it involves magnitude only. It is a scalar quantit
    11·1 answer
  • The distance from the sun to the Earth is 1.5 x 1011 m. How long does it take for light from the sun to reach the earth? Give yo
    7·2 answers
  • The rifles in the figures are being fired horizontally (straight outward, off platforms). The bullets fired from the rifles are
    15·1 answer
  • A tennis player is hitting a 58 gram tennis ball back across the net. When the racquet and the ball first make contact, the ball
    15·1 answer
  • Are There some sounds for which we are all deaf
    8·1 answer
  • Give some examples of why it is important to understand how ocean currents flow
    11·1 answer
  • Select the correct definition for each of the following terms:
    7·1 answer
  • What spheres are part of the earths system​
    10·2 answers
  • Explain, using your own words, how noise cancelling headphones work, (physics)
    6·1 answer
  • You are heating an iron to iron the shirt you're going to wear to school tomorrow. Which of the following best describes the tra
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!