10.1002/anie.202105127
Angewandte Chemie International Edition
RESEARCH ARTICLE
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smooth surface with fibrous structures (Figure 7a,b). After
exposed to TDAE vapor for 3 hours, the film surface become a
little rougher while the fibrous nanostructure is preserved (Figure
7c,d). Concurrently, the XRD pattern of PBN-19 keeps nearly
unchanged after the n-doping (Figure S7 of the Supporting
Information). Based on these results, we speculate that the
doping with TDAE occurs predominantly at the amorphous
region of the film and that the TDAE molecules do not interrupt
the ordered stacking of polymer backbones. The doped
morphology of PBN-19 films supports its relatively high electrical
conductivity and thermoelectric performance.
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In conclusion, a distannylated monomer of strong electron-deficient
BNBP is readily synthesized and used to develop A-A type
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organoboron polymers show ultralow ELUMOs of -4.4 eV. After n-
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performance is among the highest for n-type polymer thermoelectric
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The authors are grateful for the financial supports by the
National Natural Science Foundation of China (No. 22075271,
21625403, 21875244, 21875241).
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Keywords: doping • acceptor-acceptor type conjugated
polymers • conducting materials • organic thermoelectrics •
organoboron polymers
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