TY - JOUR
T1 - Donor-Acceptor Copolymer with a Linear Backbone Induced Ordered and Robust Doping Morphology for Efficient and Stable Organic Electrochemical Devices
AU - Kong, Yuxin
AU - Wang, Shijie
AU - Li, Yuxiang
AU - Pan, Guangjiu
AU - Bulut, Yusuf
AU - Zhang, Sen
AU - Chai, Guobi
AU - Wu, Ziang
AU - Qin, Hongmei
AU - Fan, Wu
AU - Liu, Qingwen
AU - Wei, Zonhan
AU - Woo, Han Young
AU - Müller-Buschbaum, Peter
AU - Roth, Stephan V.
AU - Zhang, Qidong
AU - Ma, Wei
N1 - Publisher Copyright:
© 2024 American Chemical Society.
PY - 2024/7/3
Y1 - 2024/7/3
N2 - Donor (D)-acceptor (A) copolymer-based organic mixed ionic-electronic conductors (OMIECs) exhibit intrinsic environmental stability for they have tailored energy levels. However, their figure-of-merit (μC*) is still falling behind the D-D polymers because of morphology deterioration during the electrochemical doping process. Herein, we developed two D-A copolymers with precisely regulated backbone curvature, namely PTBT-P and PTTBT-P. Compared to the curved PTBT-P and previously reported copolymers, PTTBT-P better keeps its backbone linear, leading to a long-range ordered doping morphology, which is revealed by the in operando X-ray technique. This optimized doping morphology enables a significantly improved operando charge mobility (μ) of 2.44 cm2 V-1 s-1 and a μC* value of 342 F cm-1 V-1 s-1, one of the highest values in D-A copolymer based on OECTs. Besides, we fabricated PTTBT-P-based electrochemical random-access memories and achieved ideal and robust conductance modulation. This study highlights the critical role of backbone curvature control in the optimization of doping morphology for efficient and robust organic electrochemical devices.
AB - Donor (D)-acceptor (A) copolymer-based organic mixed ionic-electronic conductors (OMIECs) exhibit intrinsic environmental stability for they have tailored energy levels. However, their figure-of-merit (μC*) is still falling behind the D-D polymers because of morphology deterioration during the electrochemical doping process. Herein, we developed two D-A copolymers with precisely regulated backbone curvature, namely PTBT-P and PTTBT-P. Compared to the curved PTBT-P and previously reported copolymers, PTTBT-P better keeps its backbone linear, leading to a long-range ordered doping morphology, which is revealed by the in operando X-ray technique. This optimized doping morphology enables a significantly improved operando charge mobility (μ) of 2.44 cm2 V-1 s-1 and a μC* value of 342 F cm-1 V-1 s-1, one of the highest values in D-A copolymer based on OECTs. Besides, we fabricated PTTBT-P-based electrochemical random-access memories and achieved ideal and robust conductance modulation. This study highlights the critical role of backbone curvature control in the optimization of doping morphology for efficient and robust organic electrochemical devices.
KW - D-A copolymer
KW - backbone curvature
KW - charge and ion transport
KW - doping morphology
KW - organic electrochemical transistors
UR - http://www.scopus.com/inward/record.url?scp=85196676321&partnerID=8YFLogxK
U2 - 10.1021/acsami.4c03795
DO - 10.1021/acsami.4c03795
M3 - Article
AN - SCOPUS:85196676321
SN - 1944-8244
VL - 16
SP - 33885
EP - 33896
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 26
ER -