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Lateral Thermal Diffusion Effects on Photothermal Signals from Photovoltaic Cells
Author(s) -
Büchner Bettine,
Cella Norberto,
Cahen David
Publication year - 1998
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.199800024
Subject(s) - photothermal therapy , chemistry , diffusion , photovoltaic system , thermal , signal (programming language) , modulation (music) , photovoltaic effect , optoelectronics , photothermal effect , perpendicular , solar cell , thermal diffusivity , photovoltaics , optics , photothermal spectroscopy , physics , acoustics , thermodynamics , electrical engineering , geometry , mathematics , computer science , programming language , engineering
Thermal diffusion, parallel to the photovoltaic junction and perpendicular to the direction of illumination , can be used to separate the contributions of injected and photogenerated carriers to the generation of heat in a photothermal experiment, and to demonstrate the influence of electronic carrier diffusion on the signal, already at relatively low modulation frequencies. We show this by using an experimental arrangement in which the distance is varied between the illuminated area of the photovoltaic cell and that over which the thermal signal is detected, and the two areas do not overlap. Our results agree with theoretical calculations used to simulate the photothermal responses of solar cells.