Donor Engineering for High Performance n‐Type OECT Materials with Exceptional Operational Stability
Abstract
Abstract Donor–acceptor (D–A) conjugated polymeric mixed ionic–electronic conductors (PMIECs) have been widely used in organic electrochemical transistors (OECTs) due to their structural diversity and the tunability of their frontier molecular orbital (FMO) energy levels. However, the slower development of n‐type materials compared to p‐type ones limits their potential in advanced technological applications. In this study, we design and synthesize a novel thiophene‐based donor building block, 2,3‐di(thiophen‐2‐yl)fumaronitrile ( DTFMCN ), for D–A conjugated n‐type PMIECs through donor engineering strategies. DTFMCN can be easily synthesized from commercially available starting materials via a simple one‐step process. The DTFMCN‐based D–A conjugated polymers, S‐DTFMCN and B‐DTFMCN , exhibit extremely low‐lying lowest unoccupied molecular orbital (LUMO) energy levels and show typical n‐type characteristics. OECT devices based on these polymers demonstrate ultra‐low threshold voltages (6 and 40 mV) and high µ C* values of 13.49 and 13.57 F cm −1 V −1 s −1 , respectively. More importantly, these devices exhibit exceptionally high operational stability; the current retention rate after 168 minutes of operation is 96%, making them one of the most stable n‐type OECT devices reported to date. This study highlights the effectiveness of DTFMCN in improving the operational stability of n‐type OECT devices, offering promising potential for applications in bioelectronics.
Article Details
Authors (13)
Riqing Ding
State Key Lab of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter South China University of Technology Guangzhou 510640 P.R. China
Xiage Zhang
Yidan Luan
State Key Lab of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter South China University of Technology Guangzhou 510640 P.R. China
Meishan Peng
State Key Lab of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter South China University of Technology Guangzhou 510640 P.R. China
Wantao Chen
State Key Lab of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter South China University of Technology Guangzhou 510640 P.R. China
Sijing Wang
Shengyao Su
Shunyang Lu
State Key Lab of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter South China University of Technology Guangzhou 510640 P.R. China
Sang Young Jeong
Department of Chemistry, Korea University, Anamro 145, Seoul 02841, Republic of Korea
Han Young Woo
Xugang Guo
Department of Materials Science and Engineering
Kui Feng
Department of Materials Science and Engineering
Zi‐Hao Guo
State Key Lab of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter South China University of Technology Guangzhou 510640 P.R. China