Indium(III) sulfide is primarily used in the field of optoelectronics due to its semiconductor properties. It is a key material in the fabrication of thin-film solar cells, where it helps in efficient light absorption and energy conversion. Additionally, it is utilized in the development of photodetectors and light-emitting diodes (LEDs), enhancing their sensitivity and performance. In the realm of nanotechnology, indium(III) sulfide serves as a crucial component in the synthesis of quantum dots, which are employed in advanced display technologies and biomedical imaging. Its ability to operate effectively in high-temperature environments also makes it suitable for use in thermoelectric devices, contributing to energy harvesting and cooling applications.