**Abstract**

The combination of characteristics belonging to bioelectrochemistry and photoelectrochemistry produces a relatively new area that can be called photobioelectrochemistry. The main idea consists of an electrochemical device that can make use of light, microorganisms, biotic materials, and/or abiotic materials for multiple applications such as energy generation, hydrogen production, CO reduction into compounds like methane, heavy metals reduction, and green material synthesis. Light can be harvested by semiconductors, phototrophic microorganisms, and biotic substances. This area of research is recent; there is no classification system to identify different combinations of materials or configurations of these devices. This heterogeneity makes it difficult for scientists to search for an application or a specific material integration to know the state of the art of the field, as well as slow down the identification of unexplored configurations of these systems. Consequently, this makes the direct comparison of contributions and advances in this area an enormous challenge. This work proposes sets for all the possible permutations of photobioelectrochemical systems, as well as a classification system for them. Additionally, it presents a scoping review of investigations regarding combinations of experimental arrangements for microbial photobioelectrochemical systems, as well as their applications to identify areas of opportunity for topics that remain unexplored.

**Keywords:** wastewater treatment, bioelectrochemical systems, photoelectrochemical systems, photobioelectrochemical systems, standardization, microbial photobioelectrochemical systems
