Grain Boundary Pinning Strategy for Enhanced Aggregate State in Organic Semiconductor Thin Films Toward Wide‐Temperature‐Range and Long‐Term Stable Gas Sensors
Abstract
ABSTRACT Flexible gas sensors based on organic semiconductors (OSCs) show great promise for diverse applications, yet their practical application is hindered by the limited operational and shelf stability of OSC‐based gas sensors over a wide temperature range. Herein, we developed a universal grain boundary pinning strategy to cooperatively optimize the aggregate state stability, sensitivity, and selectivity of the ultrathin OSC film. By incorporating multi‐functional Au nanoclusters into the OSC layer, the thermally activated molecular motion and grain boundary migration can be inhibited by the cooperative effect of strain‐balancing and dipole–π interactions. Consequently, the NH 3 sensor based on 5 nm ultrathin film exhibits record stability over an extended shelf period (tested shelf life of one‐year, theoretical shelf life of 14.8 years) and across a wide temperature range (RT‐100°C on polymer substrate, RT‐180°C on SiO 2 substrate). The grain boundary pinning strategy is demonstrated to be universal across multiple OSC systems, underscoring its potential to enable robust, high‐performance flexible gas sensors for widespread commercialization.
Article Details
Authors (14)
Quan Gao
School of Plant Protection
Kexin Tan
State Key Laboratory of Advanced Materials for Intelligent Sensing & Key Laboratory of Organic Integrated Circuit Ministry of Education & Tianjin Key Laboratory of Molecular Optoelectronic Sciences & Department of Chemistry Institute of Molecular Aggregation Science Tianjin University Tianjin China
Jiannan Qi
State Key Laboratory of Advanced Materials for Intelligent Sensing & Key Laboratory of Organic Integrated Circuit Ministry of Education & Tianjin Key Laboratory of Molecular Optoelectronic Sciences & Department of Chemistry Institute of Molecular Aggregation Science Tianjin University Tianjin China
Yudong Li
Bio-Organic Chemistry, Departments of Biomedical Engineering and Chemical Engineering & Chemistry, Institute for Complex Molecular Systems
Jiaxiao Wang
State Key Laboratory of Advanced Materials for Intelligent Sensing & Key Laboratory of Organic Integrated Circuit Ministry of Education & Tianjin Key Laboratory of Molecular Optoelectronic Sciences & Department of Chemistry Institute of Molecular Aggregation Science Tianjin University Tianjin China
Guanjie Wang
School of Chemistry, Chemical Engineering, and Biotechnology
Sooncheol Kwon
Department of Energy and Materials Engineering Dongguk University‐Seoul Seoul Republic of Korea
Qianhui Wei
GRINM (Guangdong) Institute for Advanced Materials and Technology Foshan China
Feng Wei
Molecular Spectroscopy Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
Zhongwu Wang
Yongxu Hu
Xiaosong Chen
Liqiang Li
Wenping Hu