Numerical determination of concentration-dependent Auger recombination coefficient in \(\varvec{n}\)-InGaN alloys
Direct and phonon-assisted mechanisms of Auger recombination in bulk \(n\)-\(\hbox {In}_{\mathrm{x}}\hbox {Ga}_{1-\mathrm{x}}\hbox {N}\) wurtzite alloys are numerically investigated. The matrix elements of electronelectron and electronphonon interaction are calculated using the band structure and wave functions obtained by the empirical pseudopotential method. Phonon-assisted Auger process is analyzed by the spectral density functions approach. The dependences of Auger recombination coefficient on the energy band gap of \(n\)-\(\hbox {In}_{\mathrm{x}}\hbox {Ga}_{1-\mathrm{x}}\hbox {N}\) alloys, temperature and carrier concentration are presented. The calculated Auger coefficients for alloys corresponding to the visible spectrum exhibit strong reduction at high carrier concentration.
auger recombination electronphonon interaction nitrides interband transitions