Modeling of Photon Recycling in GaN-Devices


Article Preview

The strength of recombination radiation reabsorption in GaN is discussed. For material comparisons a distance-dependent radiative recombination transfer function F(u) is introduced. In spite of high absorption rates of GaN, calculations predict ca. one order of magnitude higher photon recycling efficiency in GaN than in GaAs. Simulations of 2H-GaN p −i −n structures predict appearance of S-shaped forward I/V characteristics due to the generation of extra carriers in the base center. The study of GaN bipolar transistors shows that the radiative recombination will reduce the carrier lifetimes in the base and thereby restrict essentially the achievable current gains.



Materials Science Forum (Volumes 483-485)

Edited by:

Dr. Roberta Nipoti, Antonella Poggi and Andrea Scorzoni




E. Velmre et al., "Modeling of Photon Recycling in GaN-Devices", Materials Science Forum, Vols. 483-485, pp. 1039-1042, 2005

Online since:

May 2005




[1] W.P. Dumke: Phys. Rev. Vol. 105 (1957), p.139.

[2] Zh.I. Alferov et al.: Fiz. Tekn. Poluprovodn. Vol. 12 (1978), p.1336.

[3] Zh.I. Alferov et al.: Fiz. Tekn. Poluprovodn. Vol. 13 (1979), p.271.

[4] E. Velmre, B. Freidin and A. Udal: Physica Scripta Vol. 24 (1981), p.468.

[5] S.M. Durbin and J.L. Gray: IEEE Trans. Electron Devices Vol. 41 (1994), p.239.

[6] R.M. Sieg and S.A. Ringel: J. Appl. Phys. Vol. 80(1) (1996), p.448.

[7] J.W. Parks Jr., K.F. Brenna and A.W. Smith: J. Appl. Phys. Vol. 82(7) (1997), p.349.

[8] D.D. Sell, H.C. Casey Jr. and K.W. Wecht: J. Appl. Phys. Vol. 45 (1974), p.2650.

[9] H.C. Casey Jr., D.D. Sell and K.W. Wecht: J. Appl. Phys. Vol. 46 (1975), p.250.

[10] H.C. Casey Jr. and F. Stern: J. Appl. Phys. Vol. 47 (1976), p.631.

[11] W. van Roosbroeck and W. Shockley: Phys. Rev. Vol. 94 (1954), p.1558.

[12] J.F. Muth, J.H. Lee, I.K. Shmagin et al.: Appl. Phys. Lett. Vol. 71(18) (1997), p.2572.

[13] E. Velmre and A. Udal: Proc. Estonian Acad. Sci. Eng. (to be published in 2004).

[14] E. Velmre, A. Udal and I. Verbitski: Proc. of Baltic Electronics Conf. BEC2004, (to be published in 2004).

[15] E. Velmre: Proc. Estonian Acad. Sci. Phys. Math. Vol. 33 (1984), p.87.

[16] E. Ejder: Phys. Status Solidi(a) Vol. 49 (1978), p.445.