# Tracking Solar Optimization in Renewable Energy Systems by Using Multiplexed Holograms in Bayfol® Photopolymers

## TL;DR

This paper presents a new method for improving solar energy systems using holograms that eliminate the need for solar tracking devices.

## Contribution

The novelty lies in using multiplexed holograms in Bayfol® photopolymers to achieve wide acceptance angles without tracking.

## Key findings

- Multiplexed holograms in Bayfol® HX121 achieved a 43° acceptance angle with low-frequency patterns.
- Using three devices, a 129° angular sweep was demonstrated without tracking systems.
- The technique shows high diffraction efficiency and potential for industrial scalability.

## Abstract

Multidisciplinary technologies are truly driving major transformations in industries, innovating to become more efficient. The need for more efficient renewable energy systems, such as solar energy, has recently been addressed with the innovation of using holographic photonic devices to avoid solar tracking devices as much as possible. In this work, a multiplexed holographic device is created and characterized for use in front of a photocell, thereby eliminating the need for tracking systems due to its wide acceptance angle and high diffraction efficiency. Commercial Bayfol® HX121 photopolymer was used as the holographic recording material to manufacture holograms, achieving high performance and facilitating the industrial scaling of this technique. Results obtained using the multiplexing technique enable low-frequency holograms (478 lines/mm) with a 43° acceptance angle. Using three of these devices, a 129° angular sweep is possible without the need for tracking.