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An Efficient Diazirine‐Based Four‐Armed Cross‐linker for Photo‐patterning of Polymeric Semiconductors
Author(s) -
Wu Changchun,
Li Cheng,
Yu Xiaobo,
Chen Liangliang,
Gao Chenying,
Zhang Xisha,
Zhang Guanxin,
Zhang Deqing
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202108421
Subject(s) - semiconductor , polymer , materials science , linker , ambipolar diffusion , organic semiconductor , thin film , diazirine , alkyl , nanotechnology , chemistry , optoelectronics , photochemistry , organic chemistry , composite material , plasma , physics , quantum mechanics , computer science , operating system
A diazirine‐based four‐armed cross‐linker ( 4CNN ) with a tetrahedron geometry is presented for efficient patterning of polymeric semiconductors by photo‐induced carbene insertion. After blending of 4CNN with no more than 3 % (w/w), photo‐patterning of p‐, n‐, and ambipolar semiconducting polymers with side alkyl chains was achieved; regular patterns with size as small as 5 μm were prepared with appropriate photomasks after 365 nm irradiation for just 40 s. The interchain packing order and the thin film morphology were nearly unaltered after the cross‐linking and the semiconducting properties of the patterned thin films were mostly retained. A complementary‐like inverter with a gain value of 112 was constructed easily by two steps of photo‐patterning of the p‐type and n‐type semiconducting polymers. The results show that 4CNN is a new generation of cross‐linker for the photo‐patterning of polymeric semiconductors for all‐solution‐processible flexible electronic devices.