基于钙钛矿量子点/染料的夹层型高效率荧光太阳能集光器

High efficiency laminated luminescent solar concentrators based on perovskite quantum dots and dyes

构建多节结构是扩大荧光吸收和发射光谱的有效技术,进而提升荧光太阳能集光器的效率。本研究使用CTAB作为配体修饰的CsPbBr_(3)量子点、染料Yellow083、染料Red305作为荧光材料,EVA作为聚合物波导材料制备钙钛矿量子点/染料的夹层结构的荧光太阳能集光器。通过设计单夹层/多夹层结构可以起到扩大吸收光谱、提高光学效率、增加荧光材料稳定性、降低荧光物质毒性风险以及保护环境的作用。以CTAB作为配体修饰的CsPbBr_(3)量子点、染料Yellow083和染料Red305分别作为荧光材料的单夹层荧光太阳能集光器的外部光学效率(η_(opt))分别可以达到4.50%、4.86%以及10.92%。以CTAB作为配体修饰的CsPbBr_(3)量子点/染料Yellow083、染料Red305单层荧光太阳能集光器组合形成的双夹层结构的外部光学效率(η_(opt))分别可以达到6.04%和11.32%。我们进一步对3种荧光材料组合形成的三夹层荧光太阳能集光器进行JV测试,得到其η_(opt)可以达到11.95%,本研究也为制备钙钛矿量子点/染料的多夹层的荧光太阳能集光器提供了一种新思路。

The construction of tandem structure is an effective technique to enlarge the fluorescence absorption and emission spectra,thus improve the efficiency of luminescent solar collector.In this study,we used CTAB as ligand modified CsPbBr_(3)quantum dots,dye Yellow083,dye Red305 as fluorescent materials,and EVA as polymer waveguide materials to prepare luminescent solar concentrator(LSC)with laminated structure of perovskite quantum dots/dyes.The design of laminated structure can enlarge the absorption spectrum,improve the optical efficiency,increase the stability of fluorescent materials,reduce the toxic risk of fluorescent substances and protect the environment.The external optical efficiency(η_(opt))of single layer laminated LSCs based on CsPbBr_(3)quantum dots modified with CTAB,Yellow083 and Red305 as fluorescent materials could reach 4.5%,4.86%and 10.92%,respectively.The external optical efficiency(η_(opt))of double-layer laminated LSC based on CsPbBr_(3)quantum dots modified with CTAB,Yellow083 and Red305 could reach 6.04%and 11.32%,respectively.We further conducted JV test on the triple-layer laminated LSCs formed by the combination of three fluorescent materials,and found that theη_(opt)could reach 11.95%.This study also provides a new idea for the preparation of multi-layer laminated LSCs with perovskite quantum dots/dyes.