Highly Efficient Tandem Luminescent Solar Concentrators with a Stokes Shift Exceeding 100 nm Based on Giant InP Quantum Dots

作者：Qixin Weng, Yujie Song, Yujie Song, Yao Wang, Yanming Fu, Lei Chen, Yujie Song, Yujie Song, Kai Wang, Xiao Wei Sun, Wenda Zhang · 发表于：The Journal of Physical Chemistry Letters · 年份：2025 · DOI：10.1021/acs.jpclett.5c03134 · 被引用次数：5 · 研究领域：Photochemistry and Electron Transfer Studies、Quantum Dots Synthesis And Properties、Organic Light-Emitting Diodes Research

Indium phosphide (InP) colloidal quantum dots (QDs) show promising optical properties but face self-absorption losses in luminescent solar concentrators (LSCs). Mn 2+ doping addresses this issue. Halide ions in precursors critically influence doping efficiency: iodide’s weaker electronegativity reduces binding energy with surface cations, promoting thermal desorption during synthesis and enhancing shell growth and Mn 2+ incorporation. Using iodide precursors, Mn:InP/ZnS giant QDs (14.3 nm) are synthesized with a Stokes shift of 101 nm and a PLQY of 83%, owing to reduced lattice mismatch. These QDs retain 80% initial emission after 1000 h under aging conditions (60 °C, 90% humidity, blue light), demonstrating exceptional stability. The resulting LSCs achieve an external optical efficiency of 3.62% and a power conversion efficiency of 3.06% under simulated sunlight (100 mW/cm 2 ), representing state-of-the-art performance for InP-based LSCs and highlighting their potential for eco-friendly LSCs technologies.