Microscopic models of non-radiative and high-current effects in LEDs: state of the art and future developments

Francesco Bertazzi; Michele Goano; Marco Calciati; Xiangyu Zhou; Giovanni Ghione; Enrico Bellotti

doi:10.1117/12.2043234

27 February 2014 Microscopic models of non-radiative and high-current effects in LEDs: state of the art and future developments

Francesco Bertazzi, Michele Goano, Marco Calciati, Xiangyu Zhou, Giovanni Ghione, Enrico Bellotti

Author Affiliations +

Proceedings Volume 9003, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVIII; 900310 (2014) https://doi.org/10.1117/12.2043234
Event: SPIE OPTO, 2014, San Francisco, California, United States

Abstract

Auger recombination is at the hearth of the debate on droop, the decline of the internal quantum efficiency at high injection levels. The theory of Auger recombination in quantum wells is reviewed. The proposed microscopic model is based on a full-Brillouin-zone description of the electronic structure obtained by nonlocal empirical pseudopotential calculations and the linear combination of bulk bands. The lack of momentum conservation along the confining direction in InGaN/GaN quantum wells enhances direct (i.e. phononless) Auger transitions, leading to Auger coefficients in the range of those predicted for phonon-dressed processes in bulk InGaN.

Citation Download Citation

Francesco Bertazzi, Michele Goano, Marco Calciati, Xiangyu Zhou, Giovanni Ghione, and Enrico Bellotti "Microscopic models of non-radiative and high-current effects in LEDs: state of the art and future developments", Proc. SPIE 9003, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVIII, 900310 (27 February 2014); https://doi.org/10.1117/12.2043234

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