High carrier mobility and strong fluorescence emission: Toward highly sensitive single-crystal organic phototransistors  

作　　者：Jingwei Tao Zhaoyang Liu Dan Liu Huanli Dong Jiangbo Jing Jiaxing Song Leijing Liu Bin Xu Wenjing Tian 

机构地区：[1]State Key Laboratory of Supramolecular Structure and Materials,Jilin University,Changchun,China [2]State Key Laboratory of Electroanalytical Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun,China [3]Beijing National Laboratory for Molecular Sciences,Key Laboratory of Organic Solids,Institute of Chemistry,Chinese Academy of Sciences,Beijing,China [4]China–Australia Institute for Advanced Materials and Manufacturing,Jiaxing University,Jiaxing,China

出　　处：《Aggregate》2023年第2期247-252,共6页聚集体（英文）

摘　　要：Organic single crystals(OSCs)offer a unique combination of both individual and collective properties of the employed molecules,but it remains highly challenging to achieve OSCs with both high mobilities and strong fluorescence emissions for their potential applications in multifunctional optoelectronics.Herein,we demonstrate the design and synthesis of two novel triphenylamine-functionalized thienoacenes-based organic semiconductors,4,8-distriphenylamineethynylbenzo[1,2-b:4,5-b′]dithiophene(4,8-DTEBDT)and 2,6-distriphenylamineethynylbenzo[1,2-b:4,5-b′]dithiophene(2,6-DTEBDT),with high-mobility and strong fluorescence emission.The two compounds show the maximum mobilities up to 0.25 and 0.06 cm^(2) V^(-1) s^(-1),the photoluminescence quantum yields(PLQYs)of 51% and 45%,and the small binding energies down to 55.13 and 58.79 meV.The excellent electrical and optical properties ensured the application of 4,8-DTEBDT and 2,6-DTEBDT single crystals in ultrasensitive UV phototransistors,achieving high photoresponsivity of 9.60×105 and 6.43×10^(4) AW^(-1),and detectivity exceeding 5.68×10^(17) and 2.99×10^(16) Jones.

关 键 词：high mobility PHOTOTRANSISTORS single-crystal organic field-effect transistors strong fluorescence emission thienoacene derivatives 

分 类 号：O657.3[理学—分析化学]