Preparation And Optical Properties Of Low Dimensional Oranic Micro/Nanomaterials

In this paper,we focus on the preparation of organic semiconducting nanomaterials.By using organic semiconducting small molecules as the basic unit to construct nanostructures and using the anti-solvent method,we have prepared the corresponding optical 1D nanowires,2D nanosheets,as well as three-dimensional self-assembly to properties by changing part of the experimental conditions in the same system.(homojunction structure)not only to achieve its structure,morphology and optical properties of the regulation,but also to achieve the building blocks of self-assembly of nanowires and the optical properties of the nanowires were studied.In addition,a novel heterostructure was prepared by the two-step method of anti-solvent and physical vapor deposition method with two different organic semiconductor molecules as building blocks,and the optical properties were studied.The main contents include the following aspects:(1)The homojunction nanowires of Alq3 were prepared by the method of anti-solvent,and then the lots of nanowires were assembled to different homojunction,respectively.The morphological and optical properties of the nanowires were studied and the different self-assembly forms were studied in detail and the mechanism of the possibility was proposed.The results show that the nanowires prepared by this method have good optical waveguide properties,and with the increase of the distance of light input,the waveguide in the direction of the same side of the nanowires is obviously weakened,and the Alq3 homojunction nanowires are emerging as the emerging optoelectronic devices.(2)In the same system,Alq3 nanostructures with different morphologies were prepared by changing part of the experimental conditions.The different morphology of Alq3 nanostructures was also characterized.The morphological evolution of the nanostructures presents the mechanism of the possibility and is compared with the previous one-dimensional nanowire waveguide properties.The results show that the multi-dimensional nanostructures are controllable and have certain optical properties.This provides us with a new idea for obtaining different nanostructures and studying their properties.(3)We have successfully prepared a large number of multicolor heterojunction structures by solvent evaporation and physical vapor deposition(PVD).We first obtained the red-luminescent nanowires by solvent dispersion and then placed them in the oil bath pan,and then Alq3 was grown on the rubrene nanowires by physical vapor deposition to fabricate the nanostructures(P-Ns).The size of rubrene nanowires was controlled by varying the experimental conditions.The optical properties of Alq3-rubrene nanowire heterostructures with different sizes were investigated.It is shown that the P-N nanowire heterostructure has good optical effect and waveguide properties.