Periodic Reporting for period 1 - PLECTRA (Plasmon Coupled Luminescent Solar Concentrators and their Application in Self-Supplied Electrochromic Windows)
Période du rapport: 2021-09-01 au 2023-08-31
Luminescent solar concentrators (LSCs) present an innovative approach to constructing integrated photovoltaic systems, capable of capturing both direct and indirect sunlight through photoluminescence and channeling it into high-efficiency solar cells. The primary challenge hindering their commercial adoption is their low efficiency, attributed to the limited light absorption by the LSC's active materials and the inadequate harnessing of the solar spectrum's full range. Our work explores the enhancement of light absorption within LSCs by incorporating particles that scatter light, varying in size and shape. This method not only increase the optical pathlength within the concentrators, leading to better absorption but also broadens the spectrum of light directed towards the solar cells, thereby elevating their efficiency. Furthermore, we have examined how these concentrators scatter light at various angles and the consequent effects on the system's overall power conversion efficiency.
The implications of our research are twofold, offering both foundational insights and practical applications. The particle scattering behavior we've analyzed can improve the performance of LSCs and has potential applications in other fields, such as in the development of sunscreens and solar cells. This study is vital for advancing our utilization of renewable energy sources like solar light, emphasizing the importance of maximizing solar energy capture. The LSC technology and scattering particles we've focused on are non-toxicity, cost-effectiveness, and versatility in color. Moreover, their application extends beyond buildings to greenhouses, where they can generate electricity and modify the light spectrum to enhance plant growth.
Our research aims to deepen the understanding of how light interaction with scattering particles can boost both the optical absorption of the LSCs, and, power conversion efficiencies of solar cells. This knowledge could guide the selection of particle sizes and shapes that optimize LSC applications, contributing to the broader goal of improving renewable energy technologies.
The implications of our research are twofold, offering both foundational insights and practical applications. The particle scattering behavior we've analyzed can improve the performance of LSCs and has potential applications in other fields, such as in the development of sunscreens and solar cells. This study is vital for advancing our utilization of renewable energy sources like solar light, emphasizing the importance of maximizing solar energy capture. The LSC technology and scattering particles we've focused on are non-toxicity, cost-effectiveness, and versatility in color. Moreover, their application extends beyond buildings to greenhouses, where they can generate electricity and modify the light spectrum to enhance plant growth.
Our research aims to deepen the understanding of how light interaction with scattering particles can boost both the optical absorption of the LSCs, and, power conversion efficiencies of solar cells. This knowledge could guide the selection of particle sizes and shapes that optimize LSC applications, contributing to the broader goal of improving renewable energy technologies.
I conducted optical experiments on various particles, including purely scattering three-dimensional nanospheres, two-dimensional nanoplates, and plasmonic particles. The study focused on the optical absorption and scattering properties, as well as the photoluminescence performance of a composite system that integrates these particles with luminescent species. The findings demonstrated that the presence of scattering particles can double the efficiency of the system compared to configurations without these particles. In collaboration with the University of Oxford, we also analyzed the angle-dependent light scattering in LSC plates, revealing that the size, shape, and concentration of particles significantly enhance the performance of LSCs. Beyond their impact on LSCs, these scattering particles were found to increase the sun protection factor in sunscreens when used as an additive. I have attended conferences including the International Summit on Nanotechnology and Nanomaterials in London in 2023, the 2023 MRS Spring Meeting & Exhibit in the US, and the 2023 Gordon Research Conference in the US. Additionally, I engaged in public outreach efforts, notably presenting our team's research on luminescent solar concentrators at the Cambridge Science Festival in 2022 and 2023, making our work accessible to non-specialists through hands-on demonstrations.
This project has pioneered new methods for optical characterization, assessing the enhancement effect in both liquid (within cuvettes) and solid (as plates) forms. Additionally, angle-resolved light scattering measurements have been conducted. These efforts have deepened our understanding of light scattering systems and their role in augmenting the light absorption capabilities of the surrounding matrix. The development of LSCs is important for practical deployment in real-world situations. Collaborative endeavors have expanded to include teams from the University of Oxford, fostering further innovation in the domain. The achievements of this project hold promise for designing LSCs that are more efficient, cost-effective, and environmentally friendly, enhancing their viability for commercial use. Moreover, the advancement of LSC technology supports the integration of photovoltaics into buildings, contributing to adopting renewable energy sources and advancing urban sustainability. The LSC prototypes also serve an educational function, offering valuable insights and learning resources for students, educators, and the broader community.