determine the hole concentration at which the radiative efficiency for an electron in the conduction band will be 20%. Br values of 7.2 10^10 and 4 10^11 cm3 /s for GaAs and InGaAs, respectively.

10.3 A sample of GaAs has a lifetime for nonradiative decay to traps of Tn, 10 ns, where T 1/A Using the value of B, from Example 10-2, determine the hole concentration at which the radiative efficiency for an electron in the conduction band will be 20%