Preparation And Optoelectronic Properties Of Small Molecule Semiconductor Nanostructure

Nanostructures based on small molecule semiconductor have recently attracted a surge of interest and research because of their different electronic and optical properties from their polymers and inorganic counterparts. The small molecules exhibit variety, solution-processable, low-cost and large-area fabrication. Small molecule nanostructures are ideal materials in organic electronic devices. It has been established that the electronic and optical properties of the nanostructures are sensitively dependent on their morphology and size. However, the control over the organization and morphology of small molecule materials assemblies with a desirable size, shape and therefore function remains challenging. Therefore, it is significant to explore their fabrication and electronic and optical properties.1. Uniform nanowires of NiOEP were prepared by a facile solution process. Being assembled in visible-light sensors, these nanowires exhibit high photoconductivity with largest photoreponse ratio and photoresponsivity could reach 681 and 10.1 m A·W^-1, respectively.2. Large-size nanosheets of BPEA were fabricated by a facile solution process. The prototype photodetector was then prepared on the basis of a single nanosheet and exhibited superior performance with the largest photoresponse ratio up to 105. Moreover, the nanosheets show obvious light emission anisotropy.3. Ultralong nanowires of ADPI were prepared by a facile solution process. ADPI nanowires exhibited superior optical waveguide performance with the propagation loss of ca. 0.1 dB·?m^-1. Moreover, the nanowires show obvious optical emission anisotropy.4. Microwires and microplates of PdOEP were prepared by a facile solution process. The prototype photodetector based on a single microwire exhibited better performance than that of the photodetector on the basis of a single microplate.