Rational Synthesis of 1D Hyperbranched Heterostructures with Enhanced Optoelectronic Performance

One-dimensional (1D) hyperbranched heterostructures (HBHSs) with abundant interfaces are rendered with various interfacial phenomena and functionalities. However, the rational synthesis of 1D HBHSs with desired spatial architecture and specific interface remains a great challenge. Here, we report a seeded growth method for controlled synthesis of two extraordinary types of HBHSs, in which high-intensity of CdS branches selectively grow on 1D nanowire (NW) trunks with different growth behaviors. The composition of the HBHSs can be further tuned by combining with cation exchange method, which enriches the variety of the HBHSs. The optoelectronic devices based on a single HBHS were fabricated and exhibit a better photoresponse performance compared with that of a single NW trunk. This advance provides a strategy for the controlled synthesis HBHSs with complex morphology and offers a platform for exploring their applications for photo harvesting and conversion.

Automated summary

A controlled synthesis method for two extraordinary types of one-dimensional hyperbranched heterostructures (HBHSs) has been reported, in which CdS branches selectively grow on 1D nanowire trunks with different growth behaviors. The composition of the HBHSs can be further tuned by combining with cation exchange method, and optoelectronic devices based on a single HBHS show better photoresponse performance compared to single nanowire trunks. This advancement provides a strategy for controlled synthesis of HBHSs with complex morphology and offers a platform for exploring their applications in photo harvesting and conversion.