Auger coefficients for highly doped and highly excited silicon

Abstract

The recombination kinetics in highly doped p- and n-type silicon has been investigated at 77, 300, and 400 K through the radiative band-to-band recombination. The minority-carrier lifetime depends quadratically on the doping concentration as expected for Auger recombination. The Auger coefficients at 300 K for p- and n-type silicon are found to be Cp=9.9×10−32 cm6 s−1 and Cn=2.8×10−31 cm6 s−1. They are nearly independent of temperature in the range investigated. The Auger coefficient in highly excited pure silicon at 4.2 K (electron-hole drops) is essentially the same as in highly doped silicon.

High absorption coefficients of the CuSb(Se,Te)2 and CuBi(S,Se)2 alloys enable high-efficient 100 nm thin-film photovoltaics

“…This coefficient is rather independent of material (typically 10 −32 -10 −30 cm 6 /s and it is in the order of 10 −31 for indirect transition in Si and Ge and GaAs [32][33][34][35]. We want to estimate the Auger effect using an approximate model that is material independent, and we therefore set C a = 10 −31 cm 6 /s for all considered materials.…”

“Zero-charge” SiO2/Al2O3 stacks for the simultaneous passivation of n+ and p+ doped silicon surfaces by atomic layer deposition

“…As input for the simulations, the fundamental surface recombination velocities for electrons and holes were S n0 ¼ 6500 cm/s and S p0 ¼ 65 cm/s, respectively. In the simulations, Fermi-Dirac statistics were used, in combination with the band-gap narrowing model of Schenk [43], the Auger model of Dziewior and Schmid [55], and the Klaassen mobility model [56]. The bulk SRH lifetimes were τ p0 ¼τ n0 ¼ 1 ms.…”

Optical Measurement Techniques of Recombination Lifetime Based on the Free Carriers Absorption Effect

“…In indirect band-gap semiconductors, like Si, the SRH is dominant at moderate carrier densities (up to 10 18 cm −3 ), while the Auger recombination dominates under high doping and high injection condition (see, e.g., [22]). This implies that rad is enough higher than SRH and Auger and thus in (5) the second term is usually negligible.…”