Alkali-metal-activated perovskite quantum dot glasses for high-efficiency and long-term stable luminescent solar concentrators

Abstract

All-inorganic lead halide perovskite quantum dot (PQD) glasses exhibit exceptional potential for application in luminescent solar concentrators (LSCs) due to their outstanding photoluminescence quantum yield (PLQY), stability, and scalable synthesis. However, the crystallization of PQDs into the glass matrix usually involves complex and multi-step processes, presenting a significant hindrance to their practical application in LSCs. In this work, through alkali metal activation, we develop a one-step melt-quenching method to fabricate PQD glasses for high-efficiency and long-term stable LSCs, which simplifies the fabrication process and reduces the overall energy consumption. The alkali metal ions break the glass network and create sufficient space to facilitate the nucleation and growth of PQDs in the glass. The PQD glass reaches a high PLQY of 70% and maintains 75% of the initial PL intensity after blue light irradiation for 2000 hours. The PQD glass-based LSC devices achieve an optical efficiency of 35.9% and a power conversion efficiency of 0.93% at a geometric gain factor of 1.56. This work offers a promising strategy for designing highly efficient and stable perovskite-based LSCs.