Color-tunable multilayered laminated luminescent solar concentrators based on colloidal quantum dots

Luminescent solar concentrators (LSC) are a promising technology for building integrated photovoltaics (BIPV). Besides obtaining satisfactory efficiencies and aesthetic appeal, a simple and low-cost fabrication process is required to deploy large-scale LSCs. Herein, we introduced a facile and cost-effective fabrication method to obtain laminated LSC (L-LSC) devices. By optimizing the fabrication parameters, L-LSC based on polymer substrates exhibited higher efficiency (power conversion efficiency, PCE=0.24%, external photon efficiency, ηext=4.14% and optical efficiency, ηopt=3.46%) compared to glass-based L-LSC (PCE=0.09%, ηext=1.59%, =1.76%) due to their excellent optical properties and good compatibility with the laminated emissive layer. Using the optimized L-LSC device, a color-tunable multilayered L-LSC structure is then proposed. By embedding different QDs into two interlayers, the color appearance of the device can be tuned, simultaneously improving the overall efficiency. This study presents a notable advancement towards a practical application of L-LSCs with a satisfactory efficiency and color aesthetics for sustainable BIPVs.