TY - JOUR
T1 - Fluorinated Alcohol-Processed N-Type Organic Electrochemical Transistor with High Performance and Enhanced Stability
AU - Zhu, Genming
AU - Chen, Junxin
AU - Duan, Jiayao
AU - Liao, Hailiang
AU - Zhu, Xiuyuan
AU - Li, Zhengke
AU - McCulloch, Iain
AU - Yue, Wan
N1 - Publisher Copyright:
© 2022 American Chemical Society.
PY - 2022/9/28
Y1 - 2022/9/28
N2 - Tuning the film morphology and aggregated structure is a vital means to improve the performance of the mixed ionic-electronic conductors in organic electrochemical transistors (OECTs). Herein, three fluorinated alcohols (FAs), including 2,2,2-trifluoroethanol (TFE), 1,1,1,3,3,3-hexafluoroisopropanol (HFIP), and perfluoro-tert-butanol (PFTB), were employed as the alternative solvents for engineering the n-type small-molecule active layer gNR. Remarkedly, an impressive μC∗ of 5.12 F V-1 cm-1 s-1 and a normalized transconductance of 1.216 S cm-1 are achieved from the HFIP-fabricated gNR OECTs, which is three times higher than that of chloroform. The operational stability has been significantly enhanced by the FA-fabricated devices. Such enhancements can be ascribed to the aggregation-induced structural ordering by FAs during spin coating, which optimizes the microstructure of the films for a better mixed ion and electron transport. These results prove the huge research potential of FAs to improve OECT materials' processability, device performance, and stability, therefore promoting practical bio-applications.
AB - Tuning the film morphology and aggregated structure is a vital means to improve the performance of the mixed ionic-electronic conductors in organic electrochemical transistors (OECTs). Herein, three fluorinated alcohols (FAs), including 2,2,2-trifluoroethanol (TFE), 1,1,1,3,3,3-hexafluoroisopropanol (HFIP), and perfluoro-tert-butanol (PFTB), were employed as the alternative solvents for engineering the n-type small-molecule active layer gNR. Remarkedly, an impressive μC∗ of 5.12 F V-1 cm-1 s-1 and a normalized transconductance of 1.216 S cm-1 are achieved from the HFIP-fabricated gNR OECTs, which is three times higher than that of chloroform. The operational stability has been significantly enhanced by the FA-fabricated devices. Such enhancements can be ascribed to the aggregation-induced structural ordering by FAs during spin coating, which optimizes the microstructure of the films for a better mixed ion and electron transport. These results prove the huge research potential of FAs to improve OECT materials' processability, device performance, and stability, therefore promoting practical bio-applications.
KW - aggregation
KW - conductivity and stability
KW - fluorinated alcohols
KW - n-type small-molecule mixed conductor
KW - organic electrochemical transistors
KW - solvent engineering
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U2 - 10.1021/acsami.2c13310
DO - 10.1021/acsami.2c13310
M3 - Article
C2 - 36112127
AN - SCOPUS:85139147324
SN - 1944-8244
VL - 14
SP - 43586
EP - 43596
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 38
ER -