CsPbBr3 nanocrystal-embedded glasses for luminescent solar concentrators

Abstract

Luminescent solar concentrators (LSCs) have important application in building integrated photovoltaic. CsPbX3 (X = Cl, Br, I) perovskite nanocrystals possessing tunable band gap energies, large absorption coefficients, narrow band photoluminescence (PL), and high photoluminescence quantum yield (PL QY), have great potential application in LSCs. However, instability of perovskite nanocrystals in ambient environment still limits their practical application. Herein, as a proof-of-concept experiment, CsPbBr3 nanocrystal-embedded glass sheets with various geometric factors are investigated as LSCs. Due to the wide absorption spectral range, high PL QY, and narrow PL, optical efficiency of 6.17% (2 × 2 cm2) is achieved from LSCs based on CsPbBr3 nanocrystal-embedded glass sheets. Importantly, the stability tests show that the glass matrix can effectively protect CsPbBr3 nanocrystals from eroding of ambient environment. These results show that CsPbBr3 nanocrystal-embedded glasses are promising materials for LSCs.