Fabrication and application of porous organic single-crystal films in highly sensitive gas sensors  

作　　者：Zhangjin Chen Suhui Wang Mingke Yu Peng Li Xu Zhang Hong Wang Tengxiao Guo Chuan Liu 

机构地区：[1]School of Materials,Shenzhen Campus of Sun Yat-sen University,Shenzhen 518107,China [2]State Key Laboratory of NBC Protection for Civilian,Beijing 102205,China [3]State Key Laboratory of Optoelectronic Materials and Technologies,Guangdong Province Key Laboratory of Display Material and Technology,School of Electronics and Information Technology,Sun Yat-sen University,Guangzhou 510006,China

出　　处：《Nano Research》2025年第4期552-560,共9页纳米研究(英文版)

基　　金：the Shenzhen Science and Technology Program(No.JCYJ20220530150210023);Scientific Research Fund of the State Key Laboratory of NBC Protection for Civilian(No.SKLNBC2019-2);Guangdong Basic and Applied Basic Research Foundation(No.2021A1515110620).

摘　　要：Gas sensors based on organic semiconductor materials(OSCs)have garnered significant attention due to their cost-effectiveness and ability to operate efficiently at room temperature.However,the performance of these sensors is often constrained by the grain boundaries and defects inherent in polycrystalline films typically produced by conventional methods.In this study,a novel approach was developed for fabricating large-area porous organic single-crystal films.Hydrophobic lattice structures were engineered on hydrophilic substrate surfaces,facilitating the growth of 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene(C8-BTBT)molecules by micro-spacing sublimation with liquid crystal properties.These hydrophobic lattice structures function as thermal stress release sites during the film cooling process,enabling the formation of organic single-crystal films with precisely controlled pore locations and sizes.The resulting porous films demonstrate electrical properties on stripes with those achieved through growing on bare silicon substrates,yet exhibit enhanced sensitivity,faster response times,and a lower detection limit when used as active layers in gas sensors.This technique offers a promising pathway for advancing high-performance organic gas sensors toward industrial application.

关 键 词：organic semiconductors porous structures organic single-crystals gas sensors 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]