Abstract Luminescent nanocrystals (NCs) based luminescent solar concentrators (LSCs) are promising as a new concept for solar energy collection. The reabsorption behavior and the stability are two critical issues for the luminophores in LSCs. Here low-loss LSCs are demonstrated based on silica encapsulated CdSe (core)/CdS (shell) quantum rods (QRs) (QR@silica) with a large effective Stokes shift over 170 nm for the first time. For improving compatibility with polymer matrix and enhancing stability, QRs are encapsulated into silica shells by reverse microemulsion method. The QR@silica LSCs are fabricated by doctor-blading printing process achieving two-layer structure to reduce the reabsorption from the LSCs configuration aspect. Moreover, the self-assembly of QR@silica on the top surface of LSCs leads to more luminescent light from the QRs propagate along the horizontal direction thus improving the edge efficiency of LSCs. Benefiting from the low reabsorption of QRs, two-layer structure and the alignment of QR@silica, the edge efficiency of LSCs has reached as high as 87%, which is 4 times higher than that of silica encapsulated CdSe quantum dots (QDs) (QD@silica) LSCs in the same configurations.

中文翻译：

---

基于二氧化硅封装的量子棒的低重吸收和稳定性增强的发光太阳能聚光器

摘要 基于发光纳米晶体 (NCs) 的发光太阳能聚光器 (LSCs) 有望成为太阳能收集的新概念。重吸收行为和稳定性是 LSC 中发光团的两个关键问题。这里首次展示了基于二氧化硅封装的 CdSe（核）/CdS（壳）量子棒 (QRs) (QR@silica) 的低损耗 LSC，其有效斯托克斯位移超过 170 nm。为了提高与聚合物基体的相容性并提高稳定性，通过反微乳液法将QRs封装在二氧化硅壳中。QR@silica LSCs 是通过刮刀印刷工艺制造的，实现了两层结构，以减少 LSCs 配置方面的重吸收。而且，QR@silica 在 LSCs 上表面的自组装导致更多来自 QRs 的发光光沿水平方向传播，从而提高了 LSCs 的边缘效率。得益于QRs的低重吸收、两层结构和QR@silica的排列，LSCs的边缘效率高达87%，是二氧化硅封装的CdSe量子点（QDs）的4倍（ QD@silica) 相同配置的 LSC。