

FOLLOWUS
a.Key Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, School of Chemical & Environmental Engineering, Jianghan University, Wuhan 430056, China
b.Beijing National Laboratory for Molecular Sciences, the Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
c.Qingdao Institute of Bioenergy & Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
muyb@jhun.edu.cn (Y.B.M.)
wanxb@jhun.edu.cn (X.B.W.)
Received:24 November 2020,
Revised:2021-1-13,
Accepted:14 January 2021,
Online First:06 April 2021,
Published:14 May 2021
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Li, C. C.; Xiong, M.; Peng, J. W.; Wang, J. Y.; Zhang, H. R.; Mu, Y. B.; Pei, J.; Wan, X. B. Finely tuned electron/hole transport preference of thiazoloisoindigo-based conjugated polymers by incorporation of heavy chalcogenophenes. Chinese J. Polym. Sci. 2021, 39, 838–848
Chen-Chen Li, Miao Xiong, Jia-Wei Peng, et al. Finely Tuned Electron/Hole Transport Preference of Thiazoloisoindigo- based Conjugated Polymers by Incorporation of Heavy Chalcogenophenes[J]. Chinese Journal of Polymer Science, 2021, 39(7): 838-848.
Li, C. C.; Xiong, M.; Peng, J. W.; Wang, J. Y.; Zhang, H. R.; Mu, Y. B.; Pei, J.; Wan, X. B. Finely tuned electron/hole transport preference of thiazoloisoindigo-based conjugated polymers by incorporation of heavy chalcogenophenes. Chinese J. Polym. Sci. 2021, 39, 838–848 DOI: 10.1007/s10118-021-2552-9.
Chen-Chen Li, Miao Xiong, Jia-Wei Peng, et al. Finely Tuned Electron/Hole Transport Preference of Thiazoloisoindigo- based Conjugated Polymers by Incorporation of Heavy Chalcogenophenes[J]. Chinese Journal of Polymer Science, 2021, 39(7): 838-848. DOI: 10.1007/s10118-021-2552-9.
A series of copolymers of thiazoloisoindigo (TzII) with different chalcogenophene trimers were synthesized to systematically investigate the chalcogen effect on their charge transport properties. When only the middle thiophene ring of terthiphene (T-T-T) is replaced by heavier chalcogenophenes
a preference (expressed by the ratio of
μ
e
/
μ
h
) towards electron transport was observed descending from T-T-T to T-Se-T then to T-Te-T (Se and Te stand for selenophene and tellurophene
respectively). On the other hand
with the increased number of heavier chalcogenophenes
a preference toward hole transport was observed descending from Se-T-Se to Se-Se-Se then to Se-Te-Se. This phenomenon is well-explained by the balance between the aromatic resonance energy of the chalcogenophenes and the electronegativity of the chalcogens. Specifically
P(TzII-T-Se-T) displayed relatively balanced ambipolar property (
μ
h
max
and
μ
e
max
of 3.77 and 1.59 cm
2
·V
−1
·s
−1
with a
μ
e
/
μ
h
of 0.42)
while P(TzII-Se-Te-Se) exhibited the best preference to hole transfer with a
μ
e
/
μ
h
of 0.09. P(TzII-T-Te-T) exhibited the best preference to electron transfer with a
μ
e
/
μ
h
of 16 and the
μ
e
max
of 0.64 cm
2
·V
−1
·s
−1
which is the highest electron mobility among the known conjugated polymers containing tellurophenes.
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