Abstract
Transient photoluminescence decay has been studied theoretically and experimentally as a technique for the investigation of GaAs solar cell materials and solar cell structures. The time-dependent continuity equation was solved using two variable boundary conditions modelling the interface between the emitter and hetero-window layer (AlGaAs) and between the emitter and space charge region, respectively. The solution was found with help of the Fourier transform method and the method of residues. There results an analytical expression for the time dependent photoluminescence (PL) intensity. The influence of various solar cell parameters on this photoluminescence transient has been studied in detail. An experimental investigation of transient PL decay was performed using a synchronously pumped mode locked and cavity dumped Nd:YAG/dye laser system for excitation and an optical sampling oscilloscope as the detector. GaAs wafers with and without surface passivation have been measured as well as hetero-window pn-structures and processed solar cells. A fit of the theoretical PL transients to the measured transients allows surface and bulk recombination parameters to be determined.
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References
P.D. Demoulin, M.S. Lundstrom: IEEE Trans. ED-36, 897–905 (1989)
M.S. Tyagi, J.F. Nijs, R.J. van Overstraeten: Solid-State Electron. 25, 411–415 (1982)
R.K. Ahrenkiel, D.J. Dunlavy, T. Hanak: Solar Cells 24, 339–352 (1988)
J.M. Ohlsen, R.K. Ahrenkiel, D.J. Dunlavy, B. Keyes, A.E. Kibbler: Appl. Phys. Lett 55, 1208–1210 (1989)
R.K. Ahrenkiel: J. Appl. Phys. 62, 2937–2941 (1987)
D.C. Marvin, L.F. Halle: Proc. 21st IEEE PVSC (1990), pp. 353–356
W. Wettling, A. Ehrhardt, A. Bett, F. Lutz: Proc. 21st IEEE PVSC (1990) pp. 357–362
R.K. Ahrenkiel: In Current Topics in Photovoltaics, ed. by T.J. Coutts, J.D. Meakin, Vol. 3 (Academic, London 1988) p. 1
S.R. Dhariwal, L.S. Kothari, S.C. Jain: Solid-State Electron. 20, 297–304 (1977)
S.R. Dhariwal, N.K. Vasu: Solid-State Electron. 24, 915–927 (1981)
H. Welter: Diplomarbeit, Freiburg (1990) unpublished
H.J. Hovel: Solar cells, in Semiconductors and Semimetals, Vol. 11, ed. by R.K. Willardson, A.C. Beer (Academic, New York 1975) p. 17
I.N. Bronstein, K.A. Semendjajew: Taschenbuch der Mathematik (Harri Deutsch, Frankfurt/Main 1981)
K. Endl, W. Luh: Analysis III (Akademische Verlagsgesellschaft, Wiesbaden 1981) or other textbooks on the theory of complex functions
H. Welter, A. Bett, A. Ehrhardt, W. Wettling: Proc. 10th EC Photovoltaic Solar Energy Conference, Lisbon 1991, to be published
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Dedicated to H.-J. Queisser on the occasion of his 60th birthday
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Ehrhardt, A., Wettling, W. & Bett, A. Transient photoluminescence decay study of minority carrier lifetime in GaAs heteroface solar cell structures. Appl. Phys. A 53, 123–129 (1991). https://doi.org/10.1007/BF00323871
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DOI: https://doi.org/10.1007/BF00323871