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

Abstract

All-inorganic lead halide perovskite quantum dots (PQDs) glass exhibit exceptional potential for luminescent solar concentrators (LSCs) application due to their outstanding photoluminescence quantum yield (PLQY), stability, and scalable synthesis. However, the crystallization of PQDs into 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 method to fabricate PQD glasses for high-efficiency and long-term stable LSCs. The alkali metal ions break the glass network, facilitates the nucleation and growth of PQDs in the glass. The PQDs glass reaches a high PLQY of 70% and maintains 75% of initial PL intensity after blue light irradiation for 2000 hours. The PQDs glass-based LSC devices achieve an optical efficiency of 35.9% and power conversion efficiency of 0.93% at geometric gain factor of 1.6. The work offers a promising strategy for designing highly efficient and stable perovskite-based LSCs.