High carrier mobility and strong fluorescence emission: Toward highly sensitive single-crystal organic phototransistors
作者机构：State Key Laboratory of Supramolecular Structure and MaterialsJilin UniversityChangchunChina State Key Laboratory of Electroanalytical ChemistryChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchunChina Beijing National Laboratory for Molecular SciencesKey Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijingChina China–Australia Institute for Advanced Materials and ManufacturingJiaxing UniversityJiaxingChina
出 版 物：《聚集体(英文)》 (Aggregate)
年 卷 期：2023年第4卷第2期
页 面：247-252页
核心收录：
学科分类：07[理学] 070302[理学-分析化学] 0703[理学-化学]
主 题：high mobility phototransistors single-crystal organic field-effect transistors strong fluorescence emission thienoacene derivatives
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.
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