Advanced light management techniques can enhance the sunlight absorption of perovskite solar cells (PSCs). This paper proposes a checkerboard (CB) tile pattern with UV photon conversion capability to increase photocurrent and power conversion efficiency in ultrathin PSCs. A luminescent down-shifting encapsulant converts UV irradiation into visible photons, improving efficiency and protecting against UV degradation. Experimental results show at least 94% UV conversion into the visible spectrum, with a combined light trapping and down-shifting approach improving both performance and stability, especially relevant for space applications under AMO illumination.

Sirazul Haque, Miguel Alexandre, António T. Vicente, Kezheng Li, Christian S. Schuster, Sui Yang, Hugo Águas, Rodrigo Martins, Rute A. S. Ferreira, Manuel J. Mendes