Mn-Doped Multiple Quantum Well Perovskites for Efficient Large-Area Luminescent Solar Concentrators

Tong Wei,Kai Lian, Jiaqi Tao,Hu Zhang, Da Xu,Jiachen Han, Chao Fan,Zihui Zhang, Wengang Bi,Chun Sun

ACS APPLIED MATERIALS & INTERFACES(2022)

Cited 8|Views16
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Abstract
Luminescent solar concentrators (LSCs) can be used as large-area sunlight collectors, which show great potential in the application of building-integrated photovoltaic areas. Achieving highly efficient LSCs requires the suppression of reabsorption losses while maintaining a high photoluminescence quantum yield (PLQY) and broad absorption. Perovskites as the superstar fluorophores have recently emerged as candidates for large-area LSCs. However, highly emissive perovskites with a large Stokes shift and broad absorption have not been obtained up to now. Here, we devised a facile synthetic route to obtain Mn-doped multiple quantum well (MQW) Br-based perovskites. The Br-based perovskite host ensures broad absorption. Efficient energy transfer from the exciton to the Mn dopant produces a large Stokes shift and high PLQY simultaneously. By further coating the perovskites with Al2O3, the stability and PLQY are greatly elevated. A large area of liquid LSC (40 cm x 40 cm x 0.5 cm) is fabricated, which possesses an internal quantum efficiency (eta int) of 47% and an optical conversion efficiency (eta opt) reaching 11 ?+/- 1%, which shows the highest value for large-area LSCs.
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Key words
Mn-doped multiple quantum well,luminescence,near-unity quantum yield,large-area luminescent solar concentrators,highest optical conversion efficiency
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