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Controllable growth and flexible optoelectronic devices of regularly-assembled bi2s3 semiconductor nanowire bifurcated junctions and crosslinked networks

引用

Nano Research 2020年第8期13卷 2226-2232页

作者： Yi Hu Lingyun Mao Xin Yuan Jingyu Lu Renpeng Chen Tao Chen Wenjun Zhang Xiaolan Xue Wen Yan Mohammadreza shokouhimehr Xiao Li Zhang Zhong Jin Key Laboratory of Mesoscopic Chemistry of MOE Jiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing210023China Department of Materials science and Engineering Research Institute of Advanced MaterialsSeoul National UniversitySeoul08826Republic of Korea school of Materials science and Engineering Zhengzhou UniversityZhengzhou450001China shenzhen Research Institute of Nanjing University Shenzhen518063China

Regularly assembled structures of nanowires, such as aligned arrays, junctions and interconnected networks, have great potential for the applications in logical circuits, address decoders, photoelectronic devices and transparent electrodes. However, for now it is still lack of effective approaches for constructing nanowire bifurcated junctions and crosslinked networks with ordered orientations and high quality. Herein, we report the controlled growth of bi2s3 semiconductor nanowire bifurcated junctions and crosslinked networks with well-aligned directions and high crystalline degree by utilizing the proportional lattice match between nanowires and substrates. Taking advantages of the “tip-to-stem splice” assembly of individual nanowires, the precise orientation alignments of bi2s3 semiconductor nanowire bifurcated junctions and crosslinked networks were successfully realized. The controlled growth mechanism and structural evolution process have been elucidated by detailed atomic structure characterizations and modeling. The highly crystal quality and direct energy bandgap of as-assembled photodetectors based on individual bismuth sulfide nanowires enabled high photoresponsivity and fast switch time under light illumination. The three-terminal devices based on nanowire bifurcated junctions present rapid carrier transport across the junction. The flexible photodetectors based on nanowire crosslinked networks show very minimal decay of photocurrent after long-term bending test. This work may provide new insights for the guided construction and regular assembly of low-dimensional ordered functional nanostructures towards advanced nanotechnologies.

关键词： bi2s3 nanowires bifurcated junctions crosslinked networks flexible optoelectronic devices

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