Laser printing of CdTe microstructures: spectroscopic and structural features

Abstract

This article investigates the laser printing processes of cadmium telluride (CdTe) microparticles using the laser-induced forward transfer method and a nanosecond fiber laser source. Studies of the structural and optical characteristics of the obtained structures were carried out, including analysis by Raman spectroscopy, X-ray phase analysis, as well as atomic force and scanning electron microscopy. It is shown that the structure of the particles depends on the thickness of the source films, as well as on the transfer parameters. The formation of various modifications of CdTe, including cubic and hexagonal phases, as well as the formation of TeO₂ and Te precipitates, has been detected, which affects their properties and areas of application. An important result is the confirmation of the presence of luminescence in the printed structures, which indicates the preservation of their optical properties after laser transfer. It has been shown that the use of laser methods allows for the precise and controlled formation of structures on the surface of acceptor substrates which preserves their functional properties. The work demonstrates the potential of using laser methods to produce functional micro- and nanostructures with controlled structure and characteristics, which opens up new possibilities for their use in photonics, microelectronics, and biotechnology.