Comment on On the Yield of Singlet Excitons in Organic Light-Emitting Devices: a Double Modulation Photoluminescence-Detected Magnetic Resonance Study

C. G. Yang; E. Eherenfreund; Z. V. Vardeny

arxiv: cond-mat/0601246 · v1 · submitted 2006-01-12 · ❄️ cond-mat.other · cond-mat.mtrl-sci

Comment on On the Yield of Singlet Excitons in Organic Light-Emitting Devices: a Double Modulation Photoluminescence-Detected Magnetic Resonance Study

C. G. Yang , E. Eherenfreund , Z. V. Vardeny This is my paper

classification ❄️ cond-mat.other cond-mat.mtrl-sci

keywords excitonstripletmagneticmeh-ppvphotoluminescence-detectedpldmrresonancespin

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In a recent Letter Lee et al. studied the spin 1/2 photoluminescence-detected magnetic resonance (PLDMR) of a soluble derivative of poly-phenylene vinylene [MEH-PPV] and argued that it originates from the interaction of triplet excitons with polarons. We show that in MEH-PPV as well as in other conjugated polymers the spin 1/2 PLDMR does not depend on the triplet exciton density and thus cannot be associated with triplet excitons.

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Comment on On the Yield of Singlet Excitons in Organic Light-Emitting Devices: a Double Modulation Photoluminescence-Detected Magnetic Resonance Study

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