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    • 9. 发明公开
    • TRIPHENYLAMINE FUNCTIONALIZED OLIGOTHIOPHENES: STABLE AND LOW COST HOLE-TRANSPORTING MATERIALS FOR HIGH PERFORMANCE PEROVSKITE SOLAR CELLS
    • EP4006021A1
    • 2022-06-01
    • EP20210564.9
    • 2020-11-30
    • TOYOTA JIDOSHA KABUSHIKI KAISHA
    • KINGE, SachinSUTANTO, Albertus AdrianVELLAICHAMY, JosephCHEN, Ming-ChouKHAJA NAZEERUDDIN, Mohammad
    • C07D333/20H01L51/00
    • The present invention relates to a functionalized oligothiophene, represented by the formula (1):

               A n B x      (1)

      wherein A n is structure consisting of n thiophenes in a non-fused arrangement, wherein n is an integer and x is an integer from 1 to 6, and B is a p-(diaryl-amino)-arylene substituent of formula (2) wherein # represents the point of attachment to the structure A n , and n is an integer:

      wherein:
      R 1a , R 1b , R 2a , R 2b , R 3a , R 3b , R 3c , R 3d , R 4a , R 4b , R 4c , R 4d are each independently from one another: a hydrogen atom; a linear or branched alkyl group of 1 to 6 carbon atoms, preferably a methyl or ethyl group; or a halogen atom;
      X 1 and X 2 are each independently from one another: an alkoxy group -O-R 5 wherein R 5 is a linear or branched alkyl group of 1 to 6 carbon atoms, preferably a methyl or ethyl group;
      X 1 and X 2 are each independently from one another at an ortho, meta or para position with respect to the nitrogen atom N of formula (2);
      groups R 3a , R 3b , R 3c and R 3d represent the substituents on the four sites of the aromatic ring bearing group X 1 that are neither bound to group X 1 nor to the nitrogen atom shown in formula (2), the sites bound to groups R 3a , R 3b , R 3c and R 3d being chosen in any order on the aromatic ring bearing group X 1 ; and
      groups R 4a , R 4b , R 4c and R 4d represent the substituents on the four sites of the aromatic ring bearing group X 2 that are neither bound to group to group X 2 nor to the nitrogen atom shown in formula (2), the sites bound to groups R 4a , R 4b , R 4c and R 4d being chosen in any order on the aromatic ring bearing group X 2 , and the method of preparation thereof.
      The present invention also relates to a perovskite solar cell comprising the functionalized oligothiophene as holle transport material.