Method for drying layers of organic semiconductors, conductors or color filters using ir and nir radiation
The invention relates to a method for drying and/or subsequently treating thin layers containing organic semiconductors, organic conductors or organic colour filters. The method is used in the production of organic light emitting diodes (PLED's), organic integrated circuits (O-IC's), organic field effect transistors (OFET's), organic thin-film transistors (OTFT's), organic solar cells (O-SC's), organic laser diodes (O-lasers), organic colour filters for liquid crystal displays or organic photoreceptors.
1 . A method for producing thin layers of organic semiconductors, organic conductors or organic color filters comprising the steps:
(a) deposition of solutions or dispersions containing at least one organic semiconductor or organic conductor or organic color filters onto a substrate,
(b) drying of the wet film produced according to step (a) by means of IR and/or NIR radiation,
wherein radiation is used in step (b) with which at least 80% of the radiant energy lies in the range from 700 to 2000 nm.
2 . The method according to claim 1 , characterised in that the radiant intensity of the radiation used is greater than 75 kW/m 2 .
3 . The method according to claim 1 , wherein the dried solid film layer contains less than 1% (related to the mass) of solvent.
4 . The method according to claim 1 , wherein the drying of the wet film takes place in less than 30 seconds.
5 . The method according to claim 1 , wherein the drying (step b) takes place directly after the coating (step a).
6 . The method according to claim 1 , wherein characterised in that the drying (step b) is already started during the coating (step a).
7 . The method according to claim 1 , wherein the solutions or dispersions containing organic conductors, semiconductors or color filters contain at least one high-boiling solvent, whose boiling point amounts to at least 120° C.
8 . The method according to claim 1 , wherein the solutions or dispersions containing organic conductors, semiconductors or color filters contain at least one volatile solvent, whose vaporization enthalpy amounts to more than 1000 J/g.
9 . A method for the aftertreatment of dried layers of organic semiconductors, organic conductors or organic colour filters with IR/NIR radiation, with which at least 80% of the radiant energy lies in the range from 700 to 2000 mm.
10 . The method according to claim 9 , characterised in that the radiant intensity of the radiation used is greater than 75 kW/m 2 .
11 . The method according to claim 9 , wherein the dried solid film layer contains, prior to the aftertreatment, a content of more than 1% (related to the mass) of solvent.
12 . The method according to claim 9 , characterised in that the aftertreated solid film layer contains less than 1% (related to the mass) of solvent.
13 . The method according to claim 9 , characterised in that duration of the aftertreatment amounts to less than 30 seconds.
14 . (canceled)
15 . 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), organic laser diodes (O-lasers), organic color filters for liquid crystal displays or organic photoreceptors which are made by the process of claim 1.