EP2838931A1 - Vernetzbare sowie vernetzte polymere, verfahren zu deren herstellung sowie deren verwendung - Google Patents

Vernetzbare sowie vernetzte polymere, verfahren zu deren herstellung sowie deren verwendung

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Publication number
EP2838931A1
EP2838931A1 EP13718113.7A EP13718113A EP2838931A1 EP 2838931 A1 EP2838931 A1 EP 2838931A1 EP 13718113 A EP13718113 A EP 13718113A EP 2838931 A1 EP2838931 A1 EP 2838931A1
Authority
EP
European Patent Office
Prior art keywords
formula
polymer
radicals
formulas
groups
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13718113.7A
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German (de)
English (en)
French (fr)
Inventor
Fabrice ECKES
Anja Gerhard
Anna Hayer
Holger Heil
Dominik Joosten
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Merck Patent GmbH
Original Assignee
Merck Patent GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Merck Patent GmbH filed Critical Merck Patent GmbH
Priority to EP13718113.7A priority Critical patent/EP2838931A1/de
Publication of EP2838931A1 publication Critical patent/EP2838931A1/de
Withdrawn legal-status Critical Current

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Definitions

  • the present invention relates to crosslinkable and crosslinked polymers, processes for their preparation, the use of these crosslinked
  • OLED Organic Light Emitting Diodes
  • OLEDs Electronic devices, such as OLEDs, require components of varying functionality.
  • the different functionalities are usually in different layers.
  • multilayer OLED systems include charge transporting agents
  • Layers such as electron and hole conductor layers, as well as layers containing light-emitting components.
  • These multilayer OLED systems are usually produced by the successive layer-by-layer application of the individual layers.
  • the individual layers can either be vapor-deposited in a high vacuum or applied from solution.
  • the vapor deposition in a high vacuum is only possible for low molecular weight compounds, since only they can evaporate undecomposed.
  • the application in a high vacuum is very costly. Preference is therefore the application of solution. However, this requires that the individual materials are soluble in the corresponding solvents or solvent mixtures.
  • Another prerequisite, in order to apply a plurality of layers of solution is that upon application of each layer, the previously applied layer is not redissolved or dissolved by the solution of the subsequent layer. This can e.g. be achieved in that the respective applied layer, for example, a
  • Polymer layer is crosslinked to make them insoluble before the next layer is applied.
  • Such methods of crosslinking polymer layers are described e.g. in EP 0 637 899 and WO 96/20253.
  • CONFIRMATION COPY Crosslinkable polymers can be produced by different methods. One possibility is to attach the crosslinkable group directly to a monomer which is then polymerized
  • crosslinkable polymer optionally with further monomers becomes part of a crosslinkable polymer.
  • Corresponding preparation processes for crosslinkable polymers are described e.g. in WO 2006/043087, in WO 2005/049689, in WO 2005/052027 and in US 2007/0228364. Under certain circumstances, side reactions can occur in these processes, which are due to the fact that the crosslinkable group already reacts during the polymerization and thus to a direct crosslinking of the
  • crosslinkable or crosslinked materials do not have the
  • This object is achieved by providing a polymer comprising both triarylamine units and aromatic or heteroaromatic diamine units, at least one of which units has at least one crosslinkable group.
  • the present invention thus relates to a polymer which has at least one structural unit of the following formula (I): and at least one structural unit of the following formula (II):
  • Ar 1 to Ar 8 in each occurrence, each same or different, is a mono- or polycyclic, aromatic or heteroaromatic ring system which may be substituted by one or more R groups;
  • R 1 in each occurrence, identical or different, is H, D, F or an aliphatic, aromatic and / or heteroaromatic hydrocarbon radical having 1 to 20 C atoms, in which also one or more H atoms may be replaced by F; where two or more
  • Substituents R can also form a mono- or polycyclic, aliphatic or aromatic ring system with each other; and the dashed lines represent bonds to adjacent structural units in the polymer and the dashed lines, which are in parentheses, represent possible bonds to adjacent structural units;
  • the structural unit of the formula (II) accordingly has 2 bonds to adjacent structural units in the polymer.
  • the proportion of structural units of the formulas (I) and (II) in the polymer is in the range from 25 to 75 mol%, that is to say that the polymer contains at least one further structural unit derived from the structural units of the formulas (I ) and (II) is different.
  • the polymer contains at least one further structural unit of the following formula (III), which is different from the structural units (I) and (II):
  • Ar 9 is a mono- or polycyclic, aromatic or heteroaromatic ring system which may be substituted by one or more R radicals.
  • the polymer may be adjacent
  • Structural units of the formulas (I), (II) and optionally (III) further, from the structural units of the formulas (I), (II) and optionally (III) have different structural units.
  • polymer is to be understood as meaning both polymeric compounds, oligomeric compounds and dendrimers.
  • the polymeric compounds according to the invention preferably have 10 to 10,000, more preferably 20 to 5000 and most preferably 50 to 2000 structural units (ie repeating units).
  • the oligomeric compounds according to the invention preferably have 3 to 9 structural units.
  • the branching factor of the polymers is between 0 (linear polymer, without branching points) and 1 (fully branched dendrimer).
  • the polymers according to the invention preferably have a molecular weight M w in the range from 1000 to 2,000,000 g / mol, more preferably a molecular weight M w in the range from 10,000 to 1,500,000 g / mol and most preferably a molecular weight M w in the range of 50,000 5 to 1,000,000 g / mol.
  • the polymers according to the invention are either conjugated, partially conjugated or non-conjugated polymers. Preferred are
  • Polymers which in the main chain mainly sp 2 -hybridized (resp.
  • 20 means alternating existence of double
  • conjugated polymers Single bonds in the main chain, but also polymers with units such as a meta-linked phenylene are to be considered as conjugated polymers for the purposes of this application. "Mainly” means that naturally occurring (involuntarily) defects which lead to conjugation interruptions, the term “conjugated polymer " Not
  • conjugated polymers also apply polymers having a conjugated backbone and non-conjugated side chains. Furthermore, in the present application also referred to as conjugated, if in the main chain, for example, arylamine units,
  • Arylphosphine units certain heterocycles (i.e., conjugation via N, O, or S atoms) and / or organometallic complexes (i.e., conjugation
  • a partially conjugated polymer in the present application is meant a polymer containing conjugated regions separated by non-conjugated portions, targeted conjugation breakers (e.g., spacer groups), or branches, e.g. in which longer conjugated sections in the main chain are interrupted by non-conjugated sections, or which contains longer conjugated sections in the side chains of a non-conjugated polymer in the main chain.
  • Conjugated and partially conjugated polymers may also contain conjugated, partially conjugated or other dendrimers.
  • dendrimer is to be understood in the present application, a highly branched compound consisting of a
  • structural unit is understood in the present application to mean a unit which, starting from a monomer unit which has at least two, preferably two, reactive groups, is incorporated into this by reaction with compounding as part of the polymer backbone present in the produced polymer as a repeat unit.
  • Crosslinkable group Q in the sense of the present application means a functional group which is capable of undergoing a reaction and thus forming an insoluble compound, the reaction being able to react with another, identical group Q, another, different group Q. or any other part of it or another Polymer chain done.
  • the crosslinkable group is thus a reactive group.
  • the chemical reaction can also be carried out in the layer, resulting in an insoluble layer.
  • the crosslinking can usually be assisted by heat or by UV, microwave, X-ray or electron radiation, if appropriate in the presence of an initiator.
  • “Insoluble” in the sense of the present application preferably means that the polymer according to the invention after the crosslinking reaction, ie after the reaction the crosslinkable groups, at room temperature in an organic solvent having a solubility which is at least a factor of 3, preferably at least a factor of 10, lower than that of the corresponding non-crosslinked polymer of the invention in the same organic solvent.
  • mono- or polycyclic aromatic ring system in the present application means an aromatic ring system having 6 to 60, preferably 6 to 30 and particularly preferably 6 to 24 aromatic ring atoms, which does not necessarily contain only aromatic groups but in which also several aromatic units by a short non-aromatic unit ( ⁇ 10% of H
  • atoms preferably ⁇ 5% of the atoms other than H
  • systems such as 9,9' spirobifluorene and 9,9-diarylfluorene, be taken to mean aromatic ring systems.
  • the aromatic ring systems may be mono- or polycyclic, ie they may have one ring (eg phenyl) or several rings which may also be condensed (eg naphthyl) or covalently linked (eg biphenyl) or contain a combination of fused and linked rings ,
  • Preferred aromatic ring systems are, for example, phenyl, biphenyl,
  • Terphenyl [1, 1 ': 3', 1 "] terphenyl-2'-yl, quarterphenyl, naphthyl, anthracene, binaphthyl, phenanthrene, dihydrophenanthrene, pyrene, dihydropyrene, Chrysene, perylene, tetracene, pentacene, benzpyrene, fluorene, indene,
  • the term "mono- or polycyclic, heteroaromatic ring system” in the present application means an aromatic ring system having 5 to 60, preferably 5 to 30 and particularly preferably 5 to 24 aromatic ring atoms, one or more of these atoms being a heteroatom
  • the "mono- or polycyclic heteroaromatic ring system” does not necessarily contain only aromatic groups but may also be represented by a short non-aromatic moiety ( ⁇ 10% of the atoms other than H, preferably ⁇ 5% of the atoms other than H). , such as sp 3 -hybridized carbon atom or O or N atom, CO group, etc., be interrupted.
  • heteroaromatic ring systems may be mono- or polycyclic, i. they may have one or more rings, which may also be fused or covalently linked (e.g., pyridylphenyl), or a combination of fused and linked rings. Preference is given to fully conjugated heteroaryl groups.
  • Preferred heteroaromatic ring systems are e.g. 5-membered rings such as pyrrole, pyrazole, imidazole, 1, 2,3-triazole, 1, 2,4-triazole, tetrazole, furan,
  • Benzopyridazine benzopyrimidine, quinoxaline, phenazine, naphthyridine, azacarbazole, benzocarboline, phenanthridine, phenanthroline, Thieno [2,3b] thiophene, thieno [3,2b] thiophene, dithienothiophene,
  • the mono- or polycyclic, aromatic or heteroaromatic ring system may be unsubstituted or substituted. Substituted means in the present application that the mono- or polycyclic, aromatic or heteroaromatic ring system has one or more substituents R.
  • Heteroaralkyl distr having 5 to 60 aromatic ring atoms, which may be substituted by one or more radicals R, or a Diaryl- amino group, Diheteroarylaminooeuvre or Arylheteroarylaminooeuvre having 10 to 40 aromatic ring atoms, which may be substituted by one or more radicals R 1 ; two or more radicals R may also together contain a mono- or polycyclic, aliphatic,
  • R is most preferred at each occurrence, equal to or
  • R 1 in each occurrence is preferably, identically or differently H, D, F or an aliphatic, aromatic and / or heteroaromatic hydrocarbon radical having 1 to 20 C atoms, in which also one or more H atoms may be replaced by F; two or more substituents R 1 may also together form a mono- or polycyclic, aliphatic or aromatic ring system.
  • R 1 is particularly preferred for each occurrence, identically or differently, H or an aliphatic, aromatic and / or heteroaromatic hydrocarbon radical having 1 to 20 C atoms; two or more substituents R 1 may also together form a mono- or polycyclic, aliphatic or aromatic ring system.
  • R 1 is most preferably at each occurrence, the same or different H or an aliphatic, aromatic and / or
  • heteroaromatic hydrocarbon radical having 1 to 10 carbon atoms.
  • Ar 1 in formula (I), Ar 4 and Ar 6 in formula (IIa) and Ar 6 and Ar 7 in formula (IIb) are the following:
  • n 0, 1 or 2;
  • n 0, 1, 2 or 3;
  • p 0, 1, 2, 3, 4 or 5.
  • Preferred mono- or polycyclic, aromatic or heteroaromatic groups Ar 2 and Ar 3 in formula (I), Ar 5 , Ar 7 and Ar 8 in formula (IIa), Ar 4 , Ar 5 and Ar 8 in formula (IIb), and Ar 9 in formula (III) are the following:
  • radicals R in the formulas M1 to M19 can be the same
  • X can be CR 2 , SiR 2 , O or S, where R can also assume the same meaning as the radicals R in the formulas (I) and (II).
  • Y can be CR 2 , SiR 2 , O, S or a straight-chain or branched alkyl group having 1 to 20 C atoms or an alkenyl or alkynyl group having 2 to 20 C atoms, each of which is substituted by one or more R 1 radicals and one or more non-adjacent CH 2 groups, CH-
  • n 0, 1 or 2;
  • n 0, 1, 2 or 3;
  • Ar 1 in formula (I), Ar 4 and Ar 6 in formula (IIa) and Ar 6 and Ar 7 in formula (IIb) are the following:
  • radicals R in the formulas E1a to E12a can assume the same meaning as the radicals R in the formulas (I) and (II).
  • the indices used have the following meaning:
  • Ar 2 and Ar 3 in formula (I), Ar 5 , Ar 7 and Ar 8 in Formula (IIa), Ar 4 , Ar 5 and Ar 8 in Formula (IIb), and Ar 9 in Formula (III) are the following:
  • radicals R in the formulas M1 a to M17a can assume the same meaning as the radicals R in the formulas (I) and (II).
  • X can mean CR 2 or SiR 2 , where R can also assume the same meaning as the radicals R in the formulas (I) and (II).
  • n 0, 1 or 2;
  • n 0, 1, 2 or 3;
  • o 0, 1, 2, 3 or 4.
  • Ar 1 in formula (I), Ar 4 and Ar 6 in formula (IIa) and Ar 6 and Ar 7 in formula (IIb) are the following:
  • the radicals R 3 in the formulas Elb to Elf, E8g to E8i, E8m, E9c and E9d are the same or different, H or a straight-chain or branched alkyl group having 1 to 12 C-atoms, preferably 1 to 10 C at each occurrence atoms.
  • the radicals R 3 are particularly preferably methyl, n-butyl, sec-butyl, tert-butyl, n-hexyl and n-octyl.
  • the radicals R 4 in the formulas E2d to E2f, E3b and E4b to E4e in each occurrence, identically or differently, are H or a straight-chain or branched alkyl group having 1 to 6 C atoms, preferably 1 to 4 C atoms.
  • the radicals R 4 are particularly preferably methyl, n-butyl, sec-butyl or tert-butyl.
  • radicals R in the formulas E8k and E12b are identical or different at each occurrence, and may assume the same meaning as the radicals R in the formulas (I) and (II).
  • Ar 2 and Ar 3 in formula (I), Ar 5 , Ar 7 and Ar 8 in formula (IIa), Ar 4 , Ar 5 and Ar 8 in formula (IIb) and Ar 9 in formula (III) are the following:
  • the radicals R 3 in the formulas M7b, M10d, M12b, M13b, M14b, M14c, M17b, M20d, M20e, M20g, M20h, M20j, M21c, M22c, M22d and M23c are H or one in each occurrence, identical or different straight-chain or branched alkyl group having 1 to 12 C atoms, preferably 1 to 10 C atoms.
  • the radicals R 3 are particularly preferably methyl, n-butyl, sec-butyl, tert-butyl, n-hexyl and n-octyl.
  • the radicals R 4 in the formulas M1 c, M1 d, M14c, M20d, M20e, M20f, M20g, M20i, M20j, M2c, M22c, M22d, M23c and M23d are each the same or different, H or a straight-chain or branched alkyl group having 1 to 6 C atoms, preferably 1 to 4 C atoms.
  • the radicals R 4 are particularly preferably methyl, n-butyl, sec-butyl or tert-butyl.
  • Ar 1 is selected from the groups of the formulas E1 to E12 and Ar 2 and Ar 3 are selected from the groups of the formulas M1 to M 19, it being particularly preferred when Ar 2 and Ar 3 are the same.
  • Ar 4 and Ar 6 are structural units in which Ar 4 and Ar 6 , independently of one another, the same or different, are selected from the groups of the formulas E1 to E12 and Ar 5 , Ar 7 and Ar 8 , independently of one another, the same or different, selected from the groups of Formulas M1 to M19, it is particularly preferred that Ar 4 and Ar 6 and Ar 5 and Ar 7 are the same.
  • Ar 6 and Ar 7 are structural units in which Ar 6 and Ar 7 , independently of one another, the same or different, are selected from the groups of the formulas E1 to E12 and Ar 4 , Ar 5 and Ar 8 , independently of one another, the same or different, are selected from the groups of Formulas M1 to M19, it being particularly preferred when Ar 4 and Ar 5 or Ar 6 and Ar 7 are the same.
  • structural units of the formula (IIa) are structural units in which Ar 4 and Ar 6 , independently of one another, identical or different, are selected from the groups of the formulas El b to E12b and Ar 5 , Ar 7 and Ar 8 , independently of one another , the same or different, are selected from the groups of the formulas M1c to M14c, it being particularly preferred when Ar 4 and Ar 6 or Ar 5 and Ar 7 are the same.
  • Very particularly preferred as structural units of the formula (IIb) are structural units in which Ar 6 and Ar 7 , independently of one another, identical or different, are selected from the groups of the formulas El b to E12b and Ar 4 , Ar 5 and Ar 8 , independently of one another , the same or different, are selected from the groups of the formulas M1 c to M14c, it being particularly preferred when Ar 4 and Ar 5 or Ar 6 and Ar 7 are the same.
  • a selection of very particularly preferred structural units of the formula (IIa) or (IIb) is listed in Table 6 below.
  • Ar 9 - - (III) are structural units in which Ar 9 is selected from the groups of the formulas M1 to M19, as listed in the following Table 7.
  • Very particularly preferred structural units of the formula (III) are structural units in which Ar 9 is selected from the groups of the formulas M1 c to M14c, as listed in Table 9 below.
  • At least one of the structural units of the formula (I) and / or (II) has at least one crosslinkable group Q. It means that:
  • At least one of the structural units of the formula (I) has at least one crosslinkable group, or
  • At least one of the structural units of the formula (I) and at least one of the structural units of the formula (II) or (IIa) or (IIb) has at least one crosslinkable group.
  • the alternatives a) and b) are preferred, the alternative a) being particularly preferred, that is to say that at least one of the structural units of the formula (I) has at least one crosslinkable group.
  • At least one crosslinkable group in the present application means that a structural unit has one or more crosslinkable groups.
  • a structural unit has a crosslinkable group.
  • the structural unit of the formula (II) or (IIa) or (IIb) has the crosslinkable group, this may be bonded to Ar 4 , Ar 5 , Ar 6 , Ar 7 or Ar 8 .
  • the crosslinkable group is attached to one of the monovalent, mono- or polycyclic, aromatic or
  • heteroaromatic ring systems ie in the case of the formula (IIa) to Ar 4 or Ar 6 and in the case of the formula (IIb) to Ar 6 or Ar 7 .
  • the crosslinkable group may be bonded to Ar 1, Ar 2 or Ar.
  • the crosslinkable group is attached to the monovalent, mono- or polycyclic, aromatic or heteroaromatic ring system Ar 1 .
  • the crosslinkable group Q is a functional group capable of undergoing a chemical reaction to form an insoluble polymeric compound. It In general, all groups Q which are known to the person skilled in the art for this purpose can be used. It is in particular the task of this group to link together by means of a crosslinking reaction the polymeric compounds of the invention, optionally with further reactive polymeric compounds. This leads to a networked
  • a crosslinked layer is understood as meaning a layer which can be obtained by carrying out the crosslinking reaction from a layer of the crosslinkable, polymeric compound according to the invention.
  • Crosslinking reaction can generally be effected by heat and / or by UV, microwave, X-ray or electron radiation and / or by the use of radical formers, anions, cations, acids and / or
  • Crosslinkable groups Q preferred in accordance with the invention are those in the
  • Suitable units are a terminal or cyclic
  • terminal triple bond in particular terminal or cyclic alkenyl, terminal dienyl or terminal alkynyl groups having 2 to 40 carbon atoms, preferably with 2 to 10 C
  • alkenyloxy, dienyloxy or alkinyloxy groups are also suitable.
  • Alkynyloxy groups preferably alkenyloxy groups.
  • acrylic acid units in the broadest sense, preferably acrylic esters, acrylamides, methacrylic esters and
  • Methacrylamides Particularly preferred are Ci.-io-alkyl acrylate and Ci. 0-alkyl methacrylate.
  • crosslinking reaction of the groups mentioned above under a) to c) can be carried out via a radical, a cationic or an anionic mechanism but also via cycloaddition.
  • Suitable initiators for free-radical crosslinking are, for example, dibenzoyl peroxide, AIBN or TEMPO.
  • Suitable initiators for the cationic crosslinking are, for example, AICI 3 , BF 3 , triphenylmethyl perchlorate or tropylium hexachloroantimonate.
  • Suitable initiators for the anionic crosslinking are bases, in particular butyllithium.
  • the crosslinking is carried out without the addition of an initiator and is initiated exclusively thermally. This preference is based on the fact that the absence of the initiator
  • crosslinkable groups Q are oxetanes and oxiranes, which crosslink cationically by ring opening.
  • Suitable initiators are, for example, AICI 3 , BF 3 , triphenylmethyl perchlorate or Tropyliumhexachlorantimonat. Likewise, photoacids can be added as initiators. e) silanes:
  • silane groups S1R3 where at least two groups R, preferably all three groups R are Cl or an alkoxy group having 1 to 20 C atoms. This group reacts in the presence of water to form an oligo- or polysiloxane. f) cyclobutane groups
  • crosslinkable groups Q are generally known to those skilled in the art, as are the suitable reaction conditions used to react these groups.
  • Preferred crosslinkable groups Q include alkenyl groups of the following formula Q1, dienyl groups of the following formula Q2,
  • Alkynyl groups of the following formula Q3 alkenyioxy groups of the following formula Q4, dienyloxy groups of the following formulas Q5,
  • Alkynyloxy groups of the following formula Q6 acrylic acid groups of the following formulas Q7 and Q8, oxetane groups of the following formulas Q9 and Q10, oxirane groups of the following formula Q 11 and
  • the radicals R 11 , R 12 and R 13 in the formulas Q1 to Q8 and Q 11 are, in each occurrence, identically or differently, H, a straight-chain or branched alkyl group having 1 to 6 C atoms, preferably 1 to 4 C atoms ,
  • the radicals R 1 , R 12 and R 13 are particularly preferably H, methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl or tert-butyl and very particularly preferably H or methyl.
  • the dashed bond in the formulas Q1 to Q11 and the dashed bonds in the formula Q12 represent the attachment of the crosslinkable group to one of the mono- or polycyclic, aromatic or heteroaromatic ring systems Ar 1 to Ar 8 .
  • the crosslinkable groups of the formulas Q1 to Q12 can be linked directly to one of the mono- or polycyclic, aromatic or heteroaromatic ring systems Ar 1 to Ar 8 , or indirectly, via a further, mono- or polycyclic, aromatic or heteroaromatic ring system Ar 10 as shown in the following formulas Q13 to Q24:
  • Ar 10 in the formulas Q 13 to Q 24 can assume the same meanings as Ar 9 , in particular the preferred, particularly preferred and very particularly preferred meanings of Ar 9 .
  • crosslinkable groups Q are the following:
  • the radicals R 11 and R 12 in the formulas Q7a and Q13a to Q19a are, in each occurrence, identical or different, H or a straight-chain or branched alkyl group having 1 to 6 C atoms, preferably 1 to 4 C atoms.
  • the radicals R 11 and R 12 are particularly preferably methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl or tert-butyl and very particularly preferably methyl.
  • the radical R 3 in the formulas Q7b and Q19b at each occurrence is a straight-chain or branched alkyl group having 1 to 6 C atoms, preferably 1 to 4 C atoms.
  • the radical R 3 is particularly preferably methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl or tert-butyl and very particularly preferably methyl.
  • Very particularly preferred crosslinkable groups Q are the following: ⁇
  • the dashed lines represent the bonds to the mono- or polycyclic, aromatic or heteroaromatic ring systems Ar 1 to Ar 8 It should be noted in this context that the
  • Groups Q12 and Q24 each have two bonds to two adjacent ring carbon atoms of a mono- or polycyclic, aromatic or heteroaromatic ring system. All other crosslinkable groups merely have a bond to the mono- or polycyclic, aromatic or heteroaromatic ring system.
  • the crosslinkable group Q may be attached to any of the mono- or polycyclic, aromatic or heteroaromatic ring systems Ar 1 to Ar 8 . If the structural unit of the formula (I) has the crosslinkable group Q, this may be bonded to Ar 1 , Ar 2 or Ar 3 .
  • the crosslinkable group is attached to the monovalent, mono- or polycyclic, aromatic or heteroaromatic ring system Ar 1 .
  • the structural unit of the formula (II) or (IIa) or (IIb) has the crosslinkable group Q, this may be bonded to Ar 4 , Ar 5 , Ar 6 , Ar 7 or Ar 8 .
  • the crosslinkable group is attached to one of the monovalent, mono- or polycyclic, aromatic or
  • heteroaromatic ring systems ie in the case of the formula (IIa) to Ar 4 or Ar 6 and in the case of the formula (IIb) to Ar 6 or Ar 7 .
  • the structural unit of the formula (I) particularly preferably has the
  • crosslinkable group Q and that on the monovalent mono- or polycyclic, aromatic or heteroaromatic
  • the crosslinkable group Q can be attached to any vacant site, that is, to any carbon atom that still has a free valence.
  • each of the said crosslinkable groups Q may be bonded to each of the said groups E.
  • Preferred crosslinkable, mono- or polycyclic, aromatic or heteroaromatic groups Ar 1 in formula (I) are the following:
  • radicals R in the formulas VE1 to VE 2 can assume the same meaning as the radicals R in the formulas (I) and (II).
  • X can be CR 2 , SiR 2 , NR, O or S, where R is the same here as well
  • n 0, 1 or 2;
  • p 0, 1, 2, 3, 4 or 5.
  • crosslinkable, mono- or polycyclic, aromatic or heteroaromatic groups Ar 1 are the following:
  • radicals R in the formulas VE1a to VE12a can assume the same meaning as the radicals R in the formulas (I) and (II).
  • at least one of the radicals R can also assume the meaning Q, that is to say a further crosslinkable group Q in the groups Ar 1 .
  • n 0, 1, 2 or 3.
  • the radicals R 3 in the formulas VE1e, VE1f, VE8g, VE8h, VE8i, VE8m, VE9c and VE9d are, in each occurrence, identical or different, H or a straight-chain or branched alkyl group having 1 to 12 C atoms, preferably 1 to 10 C-atoms.
  • the radicals R 3 are particularly preferably methyl, n-butyl, sec-butyl, tert-butyl, n-hexyl and n-octyl.
  • at least one of the radicals R 3 can also assume the meaning Q, that is to say, a further crosslinkable group Q in the groups Ar 1 .
  • the radicals R 4 in the formulas VE2d to VE2f, VE3b and VE4b to VE4e in each occurrence, identically or differently, are H or a straight-chain or branched alkyl group having 1 to 6 C atoms, preferably 1 to 4 C atoms.
  • the radicals R 4 are particularly preferably methyl, n-butyl, sec-butyl or tert-butyl.
  • at least one of the radicals R 4 can also assume the meaning Q, that is to say, a further crosslinkable group Q in the groups Ar 1 .
  • radicals R in the formulas VE12b are identical or different at each occurrence, and may assume the same meaning as the radicals R in the formulas (I) and (II).
  • Ar 1 is selected from the groups of formulas VE1 to VE12
  • Ar 2 and Ar 3 are selected from the groups of formulas M1 to M19, it being particularly preferred that Ar 2 and Ar 3 are the same and Q is selected from the groups Q1 to Q24.
  • crosslinkable structural units of the formula (IV) are structural units in which Ar 1 is selected from the groups of Formulas VE1a to VE12a, Ar 2 and Ar 3 are selected from the groups of the formulas M1a to M17a, it being particularly preferred when Ar 2 and Ar 3 are the same, and Q is selected from the groups Q1a to Q24a.
  • Formulas VE1b to VE12b, Ar 2 and Ar 3 are selected from the groups of Formulas M1b to M14c, and Q is selected from Groups Q1b to Q24c.
  • crosslinkable structural units of the formula (IIva) are structural units in which Ar 4 is selected from the groups of the formulas E1 to E12, Ar 5 , Ar 7 and Ar 8 , independently of one another, identical or different, selected from the groups of the formulas M1 to M19, it being particularly preferred when Ar 5 and Ar 7 are the same, Ar 6 is selected from the groups VE1 to VE12 and Q is selected from the groups Q1 to Q24.
  • Ar 7 is selected from the groups of the formulas E1 to E12, Ar 4 , Ar 5 and Ar 8 , independently of one another, identical or different, selected from the groups of the formulas M1 to M19, it being particularly preferred when Ar 4 and Ar 5 are the same, Ar 6 is selected from the groups of Formulas VE1 to VE12 and Q is selected from Groups Q1 to Q24.
  • Particularly preferred structural units of the formula (IIva) are structural units in which Ar 4 is selected from the groups of Formulas E1a to E12a, Ar 5 , Ar 7 and Ar 8 , independently of one another, the same or different, are selected from the groups of the formulas M1a to M17a, it being particularly preferred when Ar 5 and Ar 7 are the same, Ar 6 is selected is selected from the groups of the formulas VE1a to VE12a and Q is selected from the groups Q1a to Q24a.
  • structural units of the formula (IIva) are structural units in which Ar 4 is selected from the groups of the formulas Elb to E12b, Ar 5 , Ar 7 and Ar 8 , independently of one another, identical or different, selected from the groups of the formulas M1b to M 4c, and it is particularly preferred that Ar 5 and Ar 7 are the same, Ar 6 is selected from the groups of the formulas VE1B is to VE12b and Q is selected from the groups Q1b to Q24C.
  • Very particularly preferred structural units of the formula (IIvb) are structural units in which Ar 7 is selected from the groups of the formulas Elb to E12b, Ar 4 , Ar 5 and Ar 8 , independently of one another, identical or different, selected from the groups of the formulas M1b M14c up, it being especially preferred when Ar 4 and Ar 5 are the same, Ar 6 is selected from the groups of the formulas VE1b to VE12b and Q is selected from the groups Q1b to Q24c.
  • Preferred polymers according to the invention contain:
  • P19 24 2 9; 16 - - Particularly preferred polymers according to the invention contain:
  • Very particularly preferred polymers according to the invention contain:
  • the proportion of structural units of the formula (I) in the polymer is preferably in the range from 1 to 99 mol%, particularly preferably in the range from 3 to 97 mol%, and very particularly preferably in the range from 5 to 95 mol%, based on 100 mol % of all copolymerized monomers contained in the polymer as structural units.
  • the proportion of structural units of the formula (II) in the polymer is preferably in the range from 1 to 99 mol%, particularly preferably in the range from 3 to 97 mol%, and very particularly preferably in the range from 5 to 95 mol%, based on 100 mol % of all copolymerized monomers contained in the polymer as structural units.
  • the proportion of structural units of the formula (IV) and / or (IIv), preferably of structural units of the formula (IV), which have a crosslinkable group Q, in the polymer is preferably in the range from 0.1 to 50 mol%, particularly preferably in the range of 0.5 to 40 mol%, and most preferably in the range of 1 to 30 mol%, based on 100 mol% of all copolymerized monomers contained in the polymer as structural units.
  • Structural units of the formulas (I) and (II) in the polymer 100 mol% that is to say that the polymer consists exclusively of structural units of the formulas (I) and (II).
  • the proportion of structural units of the formula (I) and / or (II), preferably of structural units of the formula (I) which have a crosslinkable group Q, is in the ranges indicated above.
  • the proportion of structural units of the formula (I) is preferably in the range of 30 to 75 mol%, of which 1 to 30 mol% of the structural units of the formula (I) have crosslinkable groups Q, and the proportion of structural units of the formula (II) also preferably in the range of 25 to 70 mol%.
  • the proportion of structural units of the formula (I) which have no crosslinkable group Q is in the range from 0 to 74 mol%.
  • the proportion of structural units of the formulas (I) and (II) in the polymer is in the range from 25 to 75 mol%, that is to say that the polymer contains further structural units, either structural units of the formula (III) which are different from the structural units (I) and (II), or structural units derived from the
  • Structural units of the formulas (I), (II) and (III) are different.
  • the proportion of these further structural units, preferably of the formula (III), then lies in the polymer in the range from 25 to 75 mol%, based on 100 mol% of all copolymerized monomers which are contained in the polymer as structural units.
  • the polymers according to the invention which contain at least one structural unit of the formula (I), at least one structural unit of the formula (II) and optionally at least one structural unit of the formula (III), where at least one structural unit of the formula (I) and / or (II) is at least a crosslinkable group Q, are usually prepared by polymerization of several different monomers, of which at least one monomer in the polymer to structural units of the formula (I), at least one monomer in the polymer to structural units of the formula (II), and optionally at least one Monomer in the polymer too
  • Structural units of the formula (III) leads.
  • Suitable polymerization reactions are known in the art and described in the literature.
  • Particularly suitable and preferred polymerization reactions which lead to C-C or C-N linkages are the following:
  • Literature for example in WO 03/048225 A2, WO 2004/037887 A2 and WO 2004/037887 A2, described in detail.
  • the C-C linkages are preferably selected from the groups of SUZUKI coupling, YAMAMOTO coupling and STILLE coupling.
  • the C-N linkage is preferably a HARTWIG-BUCHWALD coupling.
  • the present invention thus also preferably provides a process for the preparation of the polymers according to the invention, which is characterized in that it can be prepared by polymerization according to SUZUKI,
  • Halogen preferably Br and I, O-tosylate, O-triflate, O-SO 2 R 2 , B (OR 2 ) 2 and Sn (R 2 ) 3 consists.
  • R 2 is preferably independently selected at each occurrence from the group consisting of hydrogen, an aliphatic
  • Hydrocarbon radical having 1 to 20 carbon atoms and a mono- or polycyclic aromatic ring system having 6 to 20 ring atoms, wherein two or more radicals R 2 may together form a ring system.
  • aliphatic hydrocarbons having 1 to 20
  • Carbon atoms are linear, branched or cyclic alkyl groups
  • one or more hydrogen atoms may be replaced by fluorine.
  • Examples of the aliphatic hydrocarbons having 1 to 20 carbon atoms include the following: methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl (1-methylpropyl), tert-butyl, isopentyl, n-pentyl, tert-pentyl (1, 1-dimethylpropyl), 1, 2-dimethylpropyl, 2,2-dimethylpropyl (neopentyl), 1-ethylpropyl, 2-methylbutyl, n-hexyl, iso -hexyl, 1, 2-dimethylbutyl, 1-ethyl-1-methylpropyl, 1-ethyl-2-methylpropyl, 1, 1, 2-trimethylprop
  • Pentafluoroethyl 2,2,2-trifluoroethyl, ethenyl, propenyl, butenyl, pentenyl, cyclopentenyl, hexenyl, cyclohexenyl, heptenyl, cycloheptenyl, octenyl, cyclooctenyl, ethynyl, propynyl, butynyl, pentynyl, hexynyl and octynyl.
  • aromatic ring system having 6 to 20 ring atoms is intended to have the same meaning as defined above with respect to Ar 1 to Ar 8.
  • Preferred aromatic ring systems are naphthyl and phenyl, with phenyl being particularly preferred.
  • radicals R 2 together represent a branched tri-, tetra-, penta- or polyvalent aliphatic group having 6 to 20 carbon atoms.
  • Groups of monomers independently selected from Br, I and B (OR 2 ) 2 .
  • the dendrimers according to the invention can be prepared according to methods known to the person skilled in the art or in analogy thereto. Suitable methods are described in the literature, such as in Frechet, Jean MJ; Hawker, Craig J., "Hyperbranched polyphenylene and hyperbranched polyesters: new soluble, three-dimensional, reactive polymers ", Reactive & Functional Polymers (1995), 26 (1-3), 127-36; Janssen, HM; Meijer, EW,” The synthesis and characterization of dendritic molecules ", Materials Science and Technology (1999), 20 (Synthesis of Polymers), 403-458, Tomalia, Donald A., "Dendrimer molecules", Scientific American (1995), 272 (5), 62-6, WO 02/067343 A1 and WO 2005/026144 A1.
  • crosslinkable polymers according to the invention which contain at least one structural unit of the formula (I), at least one structural unit of the formula (II) and optionally at least one structural unit of the formula (III), where at least one structural unit of the formulas (I) and / or (II ) has at least one crosslinkable group Q, can as
  • Molecular weight in the range of 100 to 3000 g / mol, preferably 200 to 2000 g / mol. These other substances may e.g. improve the electronic properties or self-emit. Also, as a low-molecular substance, a styrene monomer may also be added to achieve a higher degree of crosslinking.
  • a mixture is referred to above and below as a mixture containing at least one polymeric component. In this way one or more
  • Polymer layers consisting of a mixture (blend) of one or more crosslinkable polymers according to the invention, which contain at least one structural unit of the formula (I), at least one structural unit of the formula (II) and optionally at least one structural unit of the formula (III), where at least one Structural unit of the formulas (I) and / or (II) has at least one crosslinkable group Q, and optionally one or more further polymers are prepared with one or more low molecular weight substances.
  • Another object of the present invention is thus a polymer blend containing one or more, crosslinkable invention
  • Polymers which contain at least one structural unit of the formula (I), at least one structural unit of the formula (II) and, if appropriate, at least one structural unit of the formula (III), wherein at least one structural unit of the formulas (I) and / or (II) has at least one crosslinkable group Q, and one or more further polymeric, oligomeric, dendritic and / or low molecular weight substances.
  • the present invention further provides solutions and formulations of one or more of the invention.
  • Suitable and preferred solvents are, for example, toluene, anisole, o-, m- or p-xylene, methyl benzoate, mesitylene, tetralin, veratrole, THF, methyl THF, THP, chlorobenzene, dioxane, phenoxytoluene, in particular 3-phenoxytoluene, (-) -Fenchone, 1, 2,3,5-tetramethylbenzene, 1, 2,4,5-tetramethylbenzene, 1-methylnaphthalene, 2-methylbenzothiazole, 2-phenoxyethanol, 2-pyrrolidinone, 3-methylanisole, 4-methylanisole, 3,4 Dimethylanisole, 3,5-dimethylanisole, acetophenone, a-terpineol,
  • Structural unit of the formula (I), at least one structural unit of the formula (II) and, if appropriate, at least one structural unit of the formula (III) wherein at least one structural unit of the formulas (I) and / or (II) has at least one crosslinkable group Q, are particularly suitable for the production of films or coatings, in particular for
  • both corresponding polymers can be used in pure substance, but it is also possible to use formulations or mixtures of these polymers as described above. These can be used with or without the addition of solvents and / or binders. Suitable materials, methods and devices for the above
  • Possible binders are, for example, polystyrene,
  • Polycarbonate poly (meth) acrylates, polyacrylates, polyvinyl butyral and similar, optoelectronically neutral polymers.
  • Another object of the present invention is the use of a crosslinkable polymer according to the invention which contains at least one structural unit of the formula (I), at least one structural unit of the formula (II) and optionally at least one structural unit of the formula (III), wherein at least one structural unit of the Formulas (I) and / or (II) has at least one crosslinkable group Q, for the preparation of a crosslinked polymer.
  • the crosslinkable group Q is a vinyl group or
  • the crosslinking can take place by free-radical or ionic polymerization, which can be induced thermally or by radiation.
  • the free-radical polymerization which is thermally induced is preferably at temperatures of less than 250 ° C, more preferably at temperatures of less than 200 ° C.
  • the present invention thus also provides a process for producing a crosslinked polymer which comprises the following steps:
  • Structural unit of the formulas (I) and / or (II) has at least one crosslinkable group Q;
  • Polymers are insoluble in all common solvents. In this way, defined layer thicknesses can be produced, which are also due to the
  • the present invention thus also relates to a crosslinked polymer obtainable by the aforementioned method.
  • the crosslinked polymer is preferably prepared in the form of a crosslinked polymer layer as described above. On the surface of such a crosslinked polymer layer, a further layer can be applied in all solvents because of the insolubility of the crosslinked polymer.
  • the crosslinked polymer according to the invention can be used in electronic or optoelectronic devices or for their production. Another object of the present invention is thus the crosslinked polymer according to the invention.
  • OLED organic electroluminescent devices
  • OFET organic field effect transistors
  • O-IC organic integrated circuits
  • TFT organic thin-film transistors
  • O-SC organic solar cells
  • O-lasers organic laser diodes
  • O-PAV organic photovoltaic elements or devices or organic photoreceptors (OPC), particularly preferred in organic electroluminescent devices (OLED).
  • OLEDs can be produced is known to the person skilled in the art and is described in detail, for example, as a general method in WO 2004/070772 A2, which is to be adapted accordingly for the individual case.
  • OLED also encompasses a so-called hybrid device, in which one or more polymer layers and one or more
  • Layers can occur with low molecular weight substances.
  • the low molecular weight substances can be processed either by vapor deposition in a high vacuum or from solution.
  • crosslinked polymers according to the invention are very particularly suitable as active materials in OLEDs or displays produced in this way.
  • Active layer means that the layer is capable of emitting light (light-emitting layer) upon application of an electric field and / or that it improves the injection and / or transport of the positive and / or negative charges
  • a preferred subject matter of the present invention is therefore also the use of the crosslinked polymer according to the invention in an OLED, as a charge injection or charge transport material, particularly preferably as a hole injection or hole transport material.
  • the present invention furthermore relates to electronic or optoelectronic components, preferably organic electroluminescent devices (OLED), organic light-emitting electrochemical devices Cells (OLEC), organic field effect transistors (OFET), organic integrated circuits (O-IC), organic thin film transistors (TFT), organic solar cells (O-SC), organic laser diodes (O-lasers), organic photovoltaic (OPV ) Elements or devices and organic photoreceptors (OPC), more preferably organic electroluminescent devices, with one or more active ones
  • the active layer may, for example, be a light-emitting layer, a charge-transport layer and / or a charge-injection layer, or a charge-blocking layer.
  • Crosslinked polymers according to the invention as semiconductors for the other uses described above in other electronic devices.
  • Biphenyl-2-yl-phenylamine can be synthesized according to Organic Letters 2006, 8, 1133. All other starting materials used are commercially available or are prepared according to the literature given in Table 19.
  • the solid is filtered through silica gel and Celite and the solution is concentrated.
  • the residue is treated with 800 ml of dichloromethane.
  • the phases are separated.
  • the organic phase is washed three times with 300 ml of water and dried over Na 2 S0, then filtered and concentrated by rotary evaporation.
  • the product is filtered through silica gel (toluene as eluent).
  • Step 1 50.0 g of diphenylamine (295 mmol) are mixed with 64.5 g of 3-bromobenzonitrile (355 mmol), 20 ml of tri-tert-butylphosphine (1 M solution in toluene, 20 mmol), 2.65 g of palladium acetate (1 1 mmol ) and 85.2 g of sodium tert-butoxide
  • Hot extractor extracted over a bed of alumina (basic, activity level 1). After cooling, the precipitated solid is filtered off, washed twice with about 200 ml of heptane and dried under vacuum. There remain 53.0 g (66% of theory) as a slightly colored solid.
  • Table 19 below shows the other monomers which are used in the preparation of the polymers according to the invention and whose preparation has already been described in the prior art.
  • Polymer Pol to Po39 are prepared by SUZUKI coupling according to the method described in WO 2010/097155 from the monomers depicted in Examples 1 to 6 and in Table 19.
  • the polymers having a crosslinkable vinyl group this is obtained from the aldehyde group by WITTIG reaction according to the method described in WO 2010/097155.
  • the palladium and bromine contents of the polymers are determined by ICP-MS. The determined values are below 10 ppm.
  • the molecular weights M w and the polydispersities D are determined by means of gel permeation chromatography (GPC) (Model: Agilent HPLC System Series 1100) (column: PL-RapidH from Polymer Laboratories;
  • the polymers according to the invention are applied by spin coating in a layer thickness of 20 nm on glass carrier.
  • the polymers are dissolved in toluene (concentration: 5 g / l).
  • Layer thickness is measured and checked by scratching the polymer layer with a needle, the scratch reaching down to the glass substrate. Subsequently, the depth of the scratch and thus the thickness of the
  • Polymer layer measured at least two times twice each with the aid of a Profilometernadel (Dektak, Bruker) and the average formed. If the desired layer thickness is not reached, the
  • the polymers according to the invention are spin-coated with a layer thickness of 20 nm onto glass supports coated with 80 nm PEDOT: PSS (poly (3,4-ethylenedioxy-2,5-thiophene): polystyrene sulfonate).
  • the PEDOT: PSS obtained from Heraeus Precious Metals GmbH & Co. KG, Germany, is spin-coated from water and baked for 10 minutes at 180 ° C.
  • the polymer film is baked for one hour at 180 ° C or at 220 ° C to crosslink.
  • the glass supports with the crosslinked polymer films are washed for one minute with toluene on the spin coater (rotational speed: 1000 rpm).
  • the film is baked again at 180 ° C for 10 minutes to remove the solvent.
  • the layer thickness is measured again as described above to check whether the layer thickness has changed. Table 21 shows the remaining layer thickness of the original 20 nm after the washing process. If the layer thickness does not decrease, the polymer is insoluble and thus the crosslinking is sufficient.
  • the comparative polymer V1 which carries no crosslinking group, hardly crosslinks at 220 ° C.
  • the comparative polymer V2 and the polymers P3, P5 and P7 according to the invention crosslink completely at 220.degree.
  • the polymers according to the invention can be processed from solution and, compared to vacuum-processed OLEDs, lead to OLEDs which are much easier to produce and nevertheless have good properties.
  • the polymers of the invention are in two different
  • Structure A is as follows:
  • EIL electron injection layer
  • Structure B is as follows:
  • Emission layer (60 nm)
  • HBL hole blocking layer
  • Electron transport layer (ETL) (40 nm),
  • the substrate used is glass plates coated with structured ITO (indium tin oxide) of thickness 50 nm. For better processing these are coated with PEDOT: PSS. The spin-on takes place in air from water. The layer is baked for 10 minutes at 180 ° C. 0 PEDOT: PSS is sourced from Heraeus Precious Metals GmbH & Co. KG, Germany. The interlayer and the emission layer are applied to these coated glass slides.
  • the interlayer used is the hole injection (HIL).
  • HIL hole injection
  • the interlayer according to the invention is dissolved in toluene.
  • the typical solids content of such solutions is about 5 g / l, if, as here, the typical for a device layer thickness of 20 nm is to be achieved by spin coating.
  • the layers are spun in an inert gas atmosphere, in the present case argon, and baked for 60 minutes at 180 ° C or 220 ° C.
  • the emission layer is always composed of at least one matrix material (host material, host material) and an emitting dopant (dopant, emitter). Furthermore, mixtures of several matrix materials and co-dopants can occur.
  • TMM-A 92%)
  • Dotand (8%) here means that the material TMM-A is present in a weight fraction of 92% and the dopant in a weight fraction of 8% in the emission layer.
  • the mixture for the emission layer is dissolved in toluene.
  • the typical solids content of such solutions is about 18 g / l, if, as here, the typical for a device layer thickness of 60 nm or 80 nm is to be achieved by spin coating.
  • the layers are spin-coated in an inert gas atmosphere, in the present case argon, and baked at 180 ° C. for 10 minutes.
  • the materials used in the present case are shown in Table 22.
  • the electron injection layer and the cathode are formed by a 3 nm thick barium layer and 100 nm thick aluminum layer by thermal evaporation in a vacuum chamber.
  • the materials for the hole blocking layer and electron transport layer in build B are also thermally evaporated in a vacuum chamber.
  • the electron transport layer consist of more than one material, which are admixed by co-evaporation in a certain volume fraction.
  • ETM ETM2 (50%: 50%) means that the materials ETM1 and ETM2 are present in a volume fraction of 50% each in the layer.
  • the materials used in the present case are shown in Table 23.
  • the cathode is formed by the thermal evaporation of a 100 nm thick aluminum layer.
  • the OLEDs are characterized by default.
  • the electroluminescence spectra, current-voltage-luminance characteristics (IUL characteristics) are determined assuming a lambertian radiation characteristic and the (operating) life. From the lUL characteristics are key figures, such as the operating voltage (in V) and the efficiency (in cd / A) or the external quantum efficiency (in%) at a certain operating voltage (in V) and the efficiency (in cd / A) or the external quantum efficiency (in%) at a certain
  • the electroluminescence spectra are measured at a luminance of 1000 cd / m 2 and from this the CIE 1931 x and y color coordinates are calculated.
  • LD50 @ 000cd / m 2 is the lifetime until the OLED has dropped to 50% of the initial intensity, ie 500 cd / m 2 , at a starting brightness of 1000 cd / m 2 .
  • LD80 @ 8000 cd / m 2 the durability to the OLED is dropped at an initial brightness of 8000 cd / m 2 to 80% of the initial intensity, ie at 6400 cd / m 2 and LD80 @
  • the polymers according to the invention when used as interlayer (IL) in OLEDs, give improvements over the prior art, in particular with regard to service life and operating voltage. Red and green emitting OLEDs are produced with the materials according to the invention.

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EP13718113.7A 2012-04-17 2013-04-12 Vernetzbare sowie vernetzte polymere, verfahren zu deren herstellung sowie deren verwendung Withdrawn EP2838931A1 (de)

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