Method for preparing core-shell organic/cadmium sulfide nanowire heterojunction arrays

Abstract

The invention discloses a method for preparing core-shell organic cadmium sulfide semiconductor nanowire heterojunctions and cadmium sulfide nanotubes. The method includes the steps that a single crystal organic nanowire array is grown through physical vapor deposition, the high-density organic nanowire array is used as a template, and a cadmium sulfide (CdS) shell layer is grown on a nanowire surface layer in a wrapping mode through atomic layer deposition (ALD); controllable preparation of different types of core-shell organic or inorganic heterojunction nano-structure arrays can be conveniently achieved through control over types of organic nanowires and technological conditions of atomic layer deposition; meanwhile, the organic nanowires in core shells are evaporated by being heated, and corresponding hollow inorganic nanotube arrays can be obtained. The method is easy to operate and simple in technology, products are even and high in controllability, and formation of the heterojunction can be controlled in an atomic layer grade; the heterojunction nanowires and the nanotube arrays prepared through the method have broad application prospects in nanoelectronics and photoelectron fields such as solar cells, photoswitches and sensors.

Description

technical field [0001] The invention relates to the field of semiconductor nanomaterials and their heterojunction preparation, in particular to a method for preparing a core-shell organic cadmium sulfide semiconductor nanowire heterojunction and a cadmium sulfide nanotube array. Background technique [0002] Semiconductor heterojunctions are fundamental units in a variety of optoelectronic devices and have broad and important applications. Heterojunctions can be divided into homogeneous (p-p or n-n) and heterogeneous (p-n) heterojunctions. The traditional semiconductor heterojunction is composed of two or more single crystal semiconductors with different band gaps or conductivity types due to composition modulation. It can be designed to have p-n, p-n-p, n-p-n, p-i-n or p-i-p according to needs. heterogeneous structure. The rapid development of information technology has higher and higher requirements for the miniaturization and integration of electronic and optoelectronic...

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Problems solved by technology

However, the synthesis method mentioned above is limited by the size of the AAO template, the yield is low, and the alumina template must be dissolved in further application. The introduction of organic solvents will inevitably damage the crystal quality of organic nanowires. This method Poor controllability, it is difficult to precisely control the structure of organic / inorganic heterojunction nanowires

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