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Mn-Doped Multiple Quantum Well Perovskites for Efficient Large-Area Luminescent Solar Concentrators
Tong Wei1, Kai Lian1, Jiaqi Tao1
1State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Tianjin Key Laboratory of Electronic Materials and Devices, School of Electronics and Information Engineering, Hebei University of Technology, 5340 Xiping Road, Tianjin 300401, P. R. China.
This study introduces novel Mn-doped perovskite materials for highly efficient luminescent solar concentrators (LSCs). These materials achieve broad absorption and high photoluminescence quantum yield, overcoming previous limitations for large-area applications.
Area of Science:
- Materials Science
- Photovoltaics
- Optoelectronics
Background:
- Luminescent solar concentrators (LSCs) offer potential for building-integrated photovoltaics but face challenges with reabsorption losses and achieving high photoluminescence quantum yield (PLQY).
- Perovskites are promising fluorophores for LSCs, yet achieving broad absorption, large Stokes shift, and high emission simultaneously remains difficult.
Purpose of the Study:
- To develop highly emissive perovskites with a large Stokes shift and broad absorption for efficient large-area luminescent solar concentrators.
- To suppress reabsorption losses and enhance the stability and performance of perovskite-based LSCs.
Main Methods:
- A facile synthetic route was employed to create Mn-doped multiple quantum well (MQW) Br-based perovskites.
- Energy transfer from excitons to Mn dopants was utilized to achieve a large Stokes shift and high PLQY.
- Al₂O₃ coating was applied to enhance perovskite stability and PLQY.
Main Results:
- The synthesized Br-based perovskite host demonstrated broad absorption.
- Efficient energy transfer resulted in simultaneous large Stokes shift and high PLQY.
- A large-area liquid LSC (40 cm × 40 cm × 0.5 cm) achieved an internal quantum efficiency (η_int) of 47% and an optical conversion efficiency (η_opt) of 11 ± 1%.
Conclusions:
- The developed Mn-doped perovskites are highly suitable for fabricating efficient large-area luminescent solar concentrators.
- The achieved efficiencies represent a significant advancement for LSC technology, particularly for building-integrated photovoltaic applications.
