# chemistry

posted by .

(b) Calculate the absorption edge of this material. Express your answer as a wavenumber in units of inverse meters.

• chemistry -

What material?

• chemistry -

50 g Si doped with 27g Sb

• chemistry -

Here is the full question:
(a) Silicon (50 g) has been doped with 27 mg of antimony (Sb). Determine the concentration of free charge carriers (carriers/cm3) at room temperature in this material.
(b) Calculate the absorption edge of this material. Express your answer as a wavenumber in units of inverse meters.

• chemistry -

a) 6.22*10^18

b)wavenumber= Eg / hc

Eg(Silicon band energy)= 1.11 eV (to joules)
h=6.6*10^-34
c=3*10^8

wavenumber= Eg*1.6*10^-19 / hc = 896969.69

• chemistry -

8.97*10^5

## Similar Questions

1. ### chemistry

Gallium nitride (GaN) is a semiconductor with a bandgap Eg=3.2 eV. Calculate the absorption edge of GaN. Express your answer in units of m.
2. ### chemistry

(a) Cadmium telluride (CdTe) is a semiconductor witha band gap, Eg, of 1.45 eV. Calculate the value of the absorption edge of this material. Express your answer in meters.
3. ### chemistry

(a) Cadmium telluride (CdTe) is a semiconductor witha band gap, Eg, of 1.45 eV. Calculate the value of the absorption edge of this material. Express your answer in meters.
4. ### chemistry

Cadmium telluride (CdTe) is a semiconductor witha band gap, Eg, of 1.45 eV. Calculate the value of the absorption edge of this material. Express your answer in meters.
5. ### Chemistry

(a) Silicon (50 g) has been doped with 27 mg of antimony (Sb). Determine the concentration of free charge carriers (carriers/cm3) at room temperature in this material. (b) Calculate the absorption edge of this material. Express your …
6. ### Chemistry

(a) Silicon (50 g) has been doped with 27 mg of antimony (Sb). Determine the concentration of free charge carriers (carriers/cm3) at room temperature in this material. (b) Calculate the absorption edge of this material. Express your …
7. ### CHEMISTRY

Silicon (50 g) has been doped with 27 mg of antimony (Sb). Determine the concentration of free charge carriers (carriers/cm3) at room temperature in this material. Calculate the absorption edge of this material. Express your answer …
8. ### Chemistry

Silicon (50 g) has been doped with 27 mg of antimony (Sb). Determine the concentration of free charge carriers (carriers/cm3) at room temperature in this material. Calculate the absorption edge of this material. Express your answer …
9. ### chemistry

Gallium nitride is a semiconductor with a bandgap 3.2eV . Calculate the absorption edge of GaN . Express your answer in units of m .
10. ### Chemistry

Shown below is the optical absorption spectra for a material wavenumber=9.1*10e5 Calculate the bandgap of this material. (Express your answer in eV) I'm calculate 1.13eV, but next question I don't know answer: This material is a(an) …

More Similar Questions