Photonic Crystal Waveguides for >90% Light Trapping Efficiency in Luminescent Solar Concentrators,ACS Photonics

当前位置： X-MOL 学术 › ACS Photonics › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Photonic Crystal Waveguides for >90% Light Trapping Efficiency in Luminescent Solar Concentrators
ACS Photonics ( IF 6.5 ) Pub Date : 2020-06-19 , DOI: 10.1021/acsphotonics.0c00593
Haley C. Bauser ₁ , Colton R. Bukowsky _{1,

2} , Megan Phelan ₁ , William Weigand ₃ , David R. Needell ₁ , Zachary C. Holman ₃ , Harry A. Atwater ₁

Affiliation

Luminescent solar concentrators are currently limited in their potential concentration factor and solar conversion efficiency by the inherent escape cone losses present in conventional planar dielectric waveguides. We demonstrate that photonic crystal slab waveguides tailored for luminescent solar concentrator applications can exhibit >90% light trapping efficiency. This is achieved by use of quantum dot luminophores embedded within the waveguide that absorb light at photon energies corresponding to photonic crystal leaky modes that couple to incoming sunlight. The luminophores then emit at lower photon energies into photonic crystal bound modes that enable highly efficient light trapping in slab waveguides of wavelength-scale thickness. Photonic crystal waveguides thus nearly eliminate escape cone losses, and overcome the performance limitations of previously proposed wavelength-selective dielectric multilayer filters. We describe designs for hole-array and rod-array photonic crystals comprised of hydrogenated amorphous silicon carbide using CdSe/CdS quantum dots. Our analysis suggests that photonic crystal waveguide luminescent solar concentrators using these materials these can achieve light trapping efficiency above 92% and a concentration factor as high as 100.

中文翻译：

光子晶体波导可在发光太阳能聚光器中实现> 90％的光捕获效率

当前，由于常规平面电介质波导中存在的固有逃逸锥损耗，发光太阳能集中器的潜在集中系数和太阳能转换效率受到限制。我们证明，专为发光太阳能聚光器应用量身定制的光子晶体平板波导可展现> 90％的光捕获效率。这是通过使用嵌入波导中的量子点发光体来实现的，该量子点发光体吸收与耦合到入射阳光的光子晶体泄漏模式相对应的光子能量的光。然后，发光体以较低的光子能量发射到光子晶体束缚模式中，从而能够在波长级厚度的平板波导中高效捕获光。因此，光子晶体波导几乎消除了逃逸锥损耗，并克服了先前提出的波长选择介电多层滤光片的性能限制。我们描述了使用CdSe / CdS量子点由氢化非晶碳化硅构成的孔阵列和棒阵列光子晶体的设计。我们的分析表明，使用这些材料的光子晶体波导发光太阳能聚光器可以实现92％以上的光捕获效率和高达100的聚光系数。

更新日期：2020-08-19

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11