High-performance floating-gate organic phototransistors based on n-type core-expanded naphthalene diimides  

作　　者：Xianrong Gu Yang Qin Su Sun Lidan Guo Xiangwei Zhu Xiangnan Sun 

机构地区：[1]Key Laboratory of Nanosystem and Hierarchical Fabrication,CAS Center for Excellence in Nanoscience,National Center for Nanoscience and Technology,Beijing 100190,China [2]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China [3]School of Material Science and Engineering,Zhengzhou University,Zhengzhou 450001,China

出　　处：《Chinese Chemical Letters》2023年第3期465-468,共4页中国化学快报（英文版）

基　　金：supported financially by the Ministry of Science and Technology of the People's Republic of China(No.2017YFA0206600);the National Natural Science Foundation of China(Nos.52050171,51822301,22175047,52103203,and 91963126);the CAS Instrument Development Project(No.YJKYYQ20170037);the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB36020000);the CAS Pioneer Hundred Talents Program;the Natural Science Foundation of Shandong Province(No.ZR2020ME070);China Postdoctoral Science Foundation(No.2021M690802)。

摘　　要：In the field of organic phototransistor, achieving both broad-spectral and high photosensitivity has always been a big challenge. The innovation of device structure has previously proven to be a possible solution to this problem. Here in this study, a novel organic phototransistor based on a high mobility n-type small molecule as the conducting layer and an isolated bulk heterojunction light-absorbing layer as the floating gate has been demonstrated in this study. With the special designed device structure, the phototransistor shows extremely high sensitivity to broad spectral and weak light irradiation, and the photoresponsivity and photocurrent/dark-current ratio of the device can reach up to 4840 mA/W and 1.8×10~5 respectively.For conclusion, this study suggests a potential way to obtain high-performance phototransistors at room temperature, which will further promote the commercial application of organic phototransistors.

关 键 词：Organic phototransistor Bulk heterojunction n-Type small molecule Broad spectral photoresponse Weak light irradiation 

分 类 号：TB34[一般工业技术—材料科学与工程] TN386[电子电信—物理电子学]