Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing University of Posts & Telecommunications , 9 Wenyuan Road, Nanjing 210023, China.
School of Materials Science and Engineering, Nanyang Technological University , Singapore 639798, Singapore.
ACS Appl Mater Interfaces. 2017 Jan 18;9(2):1183-1188. doi: 10.1021/acsami.6b15027. Epub 2017 Jan 4.
Because organic donor/acceptor blending systems play critical roles in ambipolar transistors, photovoltaics, and light-emitting transistors, it is highly desirable to precisely tailor the stacking of cocrystals toward different intrinsic structures and physical properties. Here, we demonstrated that the structure-stacking modes and electron-transport behaviors of coronene-F4TCNQ cocrystals (1:1) can be tuned through the solvent accommodation. Our results clearly show that the solvent accommodation not only enlarges the inner mixed packing (...DAD···) distances, leading to the depressed short-contact interactions including the side-by-side and face-by-face intermolecular interactions, but also switches off electron-transport behavior of coronene-FTCNQ cocrystals (1:1) in ambient atmosphere.
由于有机给体/受体共混体系在双极晶体管、光伏和发光晶体管中起着关键作用，因此精确地调整共晶的堆叠以获得不同的本征结构和物理性质是非常理想的。在这里，我们证明了通过溶剂容纳可以调节并四苯-四氰基对苯醌（F4TCNQ）共晶（1:1）的结构堆叠模式和电子输运行为。我们的结果清楚地表明，溶剂容纳不仅扩大了内部混合堆积（...DAD···）的距离，导致了相邻分子间相互作用（包括并排和面对面的相互作用）的短程相互作用的抑制，而且在环境气氛中也会关闭并四苯-FTCNQ 共晶（1:1）的电子输运行为。
