Parts | Days | Selection | Search | Updates | Downloads | Help

HL: Fachverband Halbleiterphysik

HL 45: Joint Poster Session

HL 45.3: Poster

Tuesday, March 15, 2011, 18:00–21:00, P1

Photoinduced absorption spectroscopy of poly(3-hexylthiophene):fullerene solar cells — •Ralph Huber, Elizabeth von Hauff, and Jürgen Parisi — University of Oldenburg, Department of Physics, Energy and Semiconductor Research Laboratory, Carl-von-Ossietzky Str. 9-11, 26129 Oldenburg, Germany

Photoinduced absorption (PIA) spectroscopy is a versatile tool in the study of excited states in organic thin films and devices. PIA is a pump-probe method which uses a modulated or pulsed light beam of a specific wavelength to excite the semiconductor (pump beam). Via a white light source the sample is illuminated additionally to measure its absorption in a reflective or transmittive manner (probe beam). The change in absorption for different wavelengths can be used to identify excited states like excitons or free charge carriers.

In this study we employed steady state PIA to investigate poly(3-hexylthiophene):fullerene organic solar cells. The results of PIA measurements on the solar cells is presented.