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Highly sensitive spectroscopic characterization of inorganic and organic heterojunctions for solar cells*

Published online by Cambridge University Press:  06 December 2006

K. Vandewal ,
L. Goris ,
K. Haenen ,
Y. Geerts  and
J. V. Manca
K. Vandewal*
Affiliation:
Institute for Materials Research, Hasselt University, and IMEC, Division IMOMEC, Wetenschapspark 1, 3590 Diepenbeek, Belgium
L. Goris
Affiliation:
Institute for Materials Research, Hasselt University, and IMEC, Division IMOMEC, Wetenschapspark 1, 3590 Diepenbeek, Belgium
K. Haenen
Affiliation:
Institute for Materials Research, Hasselt University, and IMEC, Division IMOMEC, Wetenschapspark 1, 3590 Diepenbeek, Belgium
Y. Geerts
Affiliation:
Laboratoire de Chimie des Polymères, Université libre de Bruxelles, Campus de la Plaine, CP206/01, boulevard du Triomphe, 1050 Bruxelles, Belgium
J. V. Manca
Affiliation:
Institute for Materials Research, Hasselt University, and IMEC, Division IMOMEC, Wetenschapspark 1, 3590 Diepenbeek, Belgium
*
[email protected]
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Abstract

Sub-bandgap absorption features ($\alpha \le 100$ cm−1) have been detected in organic and inorganic semiconductors and their heterojunctions. Photothermal deflection spectroscopy (PDS) is used to increase the detection limit considerably with respect to common absorption spectroscopy. Results are presented on discotic liquid crystals, donor-acceptor complex formation in P3HT:PCBM solar cells and UV-induced defect generation in nanoporous $\mathrm{TiO_2}$.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 36 , Issue 3 , December 2006 , pp. 281 - 283
Copyright
© EDP Sciences, 2006

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Footnotes

*

This paper has been presented at “ECHOS06”, Paris, 28–30 juin 2006.

References

L. Goris, Ph.D. thesis, Hasselt University, 2006
Boccara, A.C., Fournier, D., Badoz, J., Appl. Phys. Lett. 36, 130 (1981) CrossRef
Goris, L., Poruba, A., Purkrt, A., Vandewal, K., Swinnen, A., Haeldermans, I., Haenen, K., Manca, J.V., Vanecek, M., J. Non-Cryst. Solidis 352, 1656 (2006) CrossRef
Dittrich, T., Phys. Status Solidi A 182, 447 (2000) 3.0.CO;2-G>CrossRef