Femtosecond two-step carrier generation in conjugated polymers

• Published in: QELS 2001 : Quantum Electronics and Laser Science Conference : postconference technical digest p. 178
• Main Authors: Muller, J.G., Lemmer, U., Feldmann, J., Scherf, U.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 2001
• Subjects: Charge carriers; Commercialization; Monitoring; Organic light emitting diodes; Photoconductivity; Photodetectors; Photovoltaic cells; Polymers; Pulse generation; Solar power generation
• DOI: 10.1109/QELS.2001.962034
• ISBN: 155752663X; 9781557526632

Summary form only given. Conjugated polymers are currently being commercialized for applications in organic light emitting diodes. This class of materials also bears a large potential for applications in large-area photodetectors and solar cells. In such devices the underlying process is the field-assisted charge carrier generation. This process is currently a subject of intense experimental and theoretical investigations. From a fundamental point of view, charge carrier generation depends on the energetics and dynamics of intermediate states during the transition from a neutral photoexcited state (S/sub 1/-exciton) to a pair of free charge carriers. In our work we use a femtosecond two pulse excitation scheme and monitor the charge generation directly by detecting the photocurrent.