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HL: Fachverband Halbleiterphysik

HL 9: Poster 1

HL 9.89: Poster

Montag, 23. März 2009, 14:30–17:00, P2

Photoluminescence Detected Magnetic Resonance (PLDMR) studies on oxygen doped P3HT — •Hannes Kraus¹, Andreas Sperlich¹, Carsten Deibel¹, and Vladimir Dyakonov^1,2 — ¹Experimental Physics VI, Physical Institute, Julius-Maximilians-University of Würzburg, D-97074 Würzburg — ²ZAE Bayern, Div. Functional Materials for Energy Technology, D-97074 Würzburg

Poly(3-hexylthiophene) (P3HT) is one of the most promising semiconducting polymers for applications in organic optoelectronics and solar cells. To improve the overall stability of polymer devices, the intrinsic stability of P3HT has to be further investigated. The excited states in P3HT subjected to oxygen were studied with optical (PL excited by 532nm) and spin-sensitive (X-band electron spin resonance, ESR) techniques, and furthermore with a combination of these: photoluminescense detected magnetic resonance (PLDMR). With PLDMR, the sample’s spin state can be identified by measuring the photoluminescense change due to resonant microwave irradiation. By comparing the data obtained with ESR, PL and PLDMR on P3HT, before and after oxygen exposition, a more complete picture of oxygen-P3HT interaction can be achieved.