Técnicas experimentales para caracterizar materiales fotoconductores

Abstract

The aim of this research work was to identify techniques for the characterization of photoconductive materials. For this purpose, a documentary and bibliographic review of scientific texts, scientific-academic bibliography called academic Google and websites of scientific journals was carried out, emphasizing the particularities of each one, as well as their experimental and application potentialities and weaknesses. A review of works published during the last five years was carried out, including articles and research studies related to the technological application of these materials. In the search process, terms related to the central theme were used, such as "photoconductivity", "photoconductive materials", "constant photocurrent method", the articles retained, after the review of the research, were analysed in detail using a table of evidence to show the most relevant characteristics and results of the study. Among the most relevant results, it was found that the characterization depends on the nature of the material and the source of electromagnetic radiation used to stimulate it, such as light intensity, frequency, number of photons, among others. Photoconductive materials often prepared as thin films are of interest for large area applications, e.g. solar cells, back panel display transistors, photoemissive devices and medical imaging. It is concluded that the Raman spectroscopy technique is the most efficient technique compared to others due to the non-invasive analysis process that does not affect the samples. Studies focusing on the microstructures of photoconductive materials are recommended to gain a better understanding of their possible applications.