Liquid nitrogen post-treatment for improved aggregation and electrical properties in organic semiconductors  

作　　者：Yuqing Ding Zhiying Yi Zhihui Wang Hongyu Chen Yan Zhao 

机构地区：[1]Laboratory of Molecular Materials and Devices,Department of Materials Science,Fudan University,Shanghai 200433,China [2]Department of Pathology,Changhai Hospital,Naval Medical University,Shanghai 200433,China [3]Second Medical Center&National Clinical Research Center for Geriatric Diseases,Chinese People’s Liberation Army General Hospital,Beijing 100853,China

出　　处：《Chinese Chemical Letters》2024年第12期278-284,共7页中国化学快报（英文版）

基　　金：supported by the National Key R&D Program of China(No.2022YFB3603804);Natural Science Foundation of Shanghai(No.22ZR1407800)。

摘　　要：Organic semiconductors are promising candidates as active layers in flexible and biocompatible electronics owing to their solution processability and molecular design flexibility.However,it remains necessary to establish a green processing approach to acquire desirable electrical properties for scalable industrial applications.Here,a highly efficient and environmentally friendly post-treatment method using liquid nitrogen as a cooling bath is developed to optimize the aggregation structure and electrical performance of organic semiconductors.The carrier mobility has increased by nearly 60%with this treatment,achieving a performance boost comparable to that of traditional annealing methods.This performance improvement is attributable to the denser aggregation structure and enhanced molecular ordering compared with those of as-cast semiconducting polymer films.Impressively,the entire process can be completed within a few minutes without additional vacuum or high-temperature conditions,offering an economical and efficient alternative to traditional methods.Furthermore,the enhancement effect and long-term stability of this treatment are validated across a wide range of organic semiconductors,positioning this green and versatile approach as a promising substitute for conventional post-treatment,thereby facilitating the development of next-generation sustainable electronics.

关 键 词：Organic electronics Environmentally friendly process Ultralow-temperature post-treatment Charge carrier mobility Semiconducting polymer Organic small molecule 

分 类 号：TN304.5[电子电信—物理电子学]