Transparent Photovoltaics Using Parallel Silicon Strips in Polymer Scaffold

Abstract

Building-integrated photovoltaics (BIPVs) are crucial for achieving zero-energy building goals; however, commercial technology remains limited to opaque fa & ccedil;ades. In this regard, transparent photovoltaic (TPV) technologies, such as semitransparent solar cells and luminescent solar concentrators, can utilize window areas. Nevertheless, their applications remain limited because of the trade-offs between light transmittance and efficiency, low performance, structural challenges in large-area expansion and aesthetic issues due to colour. This study developed a TPV structure that utilizes the difference between the user's viewing angle and angle of sunlight incidence. Its practical feasibility was also demonstrated. The TPV system achieved competitive performance compared to conventional opaque photovoltaic systems. Finally, the TPVs were integrated into commercial windows to demonstrate their practical potential in applications wherein transparency is critical (e.g., windows, noise barriers and auto-motive glass).