Automated system for surface photovoltage spectroscopy

Y González; A Abelenda; O de Melo; C Calvo-Mola; L García-Pelayo; B J García; M Sánchez

doi:10.1063/5.0035179

Automated system for surface photovoltage spectroscopy

Rev Sci Instrum. 2021 Jan 1;92(1):013104. doi: 10.1063/5.0035179.

Authors

Y González¹, A Abelenda¹, O de Melo¹, C Calvo-Mola¹, L García-Pelayo², B J García², M Sánchez¹

Affiliations

¹ Facultad de Física, Universidad de La Habana, San Lázaro y L, Vedado, 10400 La Habana, Cuba.
² Departamento de Física Aplicada, Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain.

PMID: 33514227
DOI: 10.1063/5.0035179

Abstract

This paper details the development of a lab-made experimental setup for surface photovoltage spectroscopy (SPS) measurements using an open-source and Arduino^® microcontroller to control a monochromator and some off-the-shelf electronic components. The experimental setup is interfaced to a computer, where LabVIEW^® based software manages system control and data acquisition. We also report the design of a compact sample holder, simple and easy to manufacture and handle. Results of the application of SPS to the characterization of MoO₃ thin films and semiconductor laser structures are presented to validate the performance of the setup, highlighting the effectiveness of SPS for the characterization of semiconductor materials and devices.