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US 7,252,781 B2Granted
Solutions of polymer semiconductors
AssigneeMerck Patent GmbH
InventorsHubert Spreitzer, Heinrich Becker, Willi Kreuder, Sybille Berg, Andreas Sauer
Life of this patent
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Abstract
The present invention relates to a process for producing particle-free solutions of polymeric semiconductors and to their use for producing layers of polymeric semiconductors in polymeric organic light-emitting diodes (PLEDs), organic integrated circuits (O-ICs), organic field effect transistors (OFETs), organic thin film transistors (OTFTs), organic solar cells (O-SCs) or organic laser diodes (O-lasers).
Claims25
A process for preparing solutions comprising polymeric organic semiconductors, which comprises the steps:
- A) dissolution of at least one polymeric organic semiconductor in a suitable solvent (STARTING SOLUTION),
- B) after-treatment of the STARTING SOLUTION from step A) (SOLUTION),
- C) filtration of the SOLUTION from step B) by means of dead-end filtration and/or crossflow filtration and isolation of the filtered solution comprising at least one polymeric organic semiconductor (FILTERED SOLUTION).
Dependencies are inferred from the claim text.