近日，韩国电子技术研究院的Chul Jong Han及其研究小组与韩国弘益大学的Heesun Yang以及韩国先进纳米制造中心的Ho Kwan Kang等人合作并取得一项新进展。经过不懈努力，他们成功通过几乎无损的传播途径提高发光太阳能聚光器的效率。相关研究成果已于2024年1月11日在国际知名学术期刊《自然—光子学》上发表。
该研究团队介绍了一种新型层压型LSC结构，其中包含图案化的低折射率介质，作为光学“护栏”，为光子提供几乎不衰减的路径。此外，研究人员还提出了关于LSC尺寸和荧光团光谱特性的设计规则。遵循这些规则，他们成功实现了创纪录的LSC性能。在450nm波长处，测量到的外部量子效率在100cm2面积上达到45%，而在边缘长宽比为71的LSC上为32%。
据研究人员所知，该器件的效率达到了7.6%，是有史以来报道的最高值。这些发现具有潜在的工业应用价值，并可能加速LSC的商业化进程。
据悉，发光太阳能聚光器（LSCs）具有作为建筑物能量收集窗口的巨大潜力。尽管纳米技术的进步催生了新型荧光团（如量子点和钙钛矿）的出现，但由于功率转换效率不足，这种功能玻璃的商业化应用尚未成熟。简言之，仅依赖荧光团的改进还无法充分发挥LSCs的全部潜力。
附：英文原文
Title: Luminescent solar concentrator efficiency enhanced via nearly lossless propagation pathways
Author: Park, Kyoungwon, Yi, Jeongmin, Yoon, Suk-Young, Park, Seong Min, Kim, Jiyong, Shin, Hyun-Beom, Biswas, Swarup, Yoo, Gang Yeol, Moon, Sang-Hwa, Kim, Jiwan, Oh, Min Suk, Wedel, Armin, Jeong, Sohee, Kim, Hyeok, Oh, Soong Ju, Kang, Ho Kwan, Yang, Heesun, Han, Chul Jong
Issue&Volume: 2024-01-11
Abstract: Luminescent solar concentrators (LSCs) have the potential to serve as energy-harvesting windows in buildings. Although recent advances in nanotechnology have led to the emergence of novel fluorophores such as quantum dots, perovskites and others, the commercialization of such functional glass remains immature due to an insufficient power conversion efficiency. In other words, improvements in fluorophores alone cannot fully maximize the potential of LSCs. Here we introduce a new laminated type of LSC structure where a patterned low-refractive-index medium acts as an optical ‘guard rail’, providing a practically non-decaying path for guiding photons. We also propose the design rules regarding the dimensions of LSCs and the spectral characteristics of fluorophores. Once these rules were applied, we achieved record-high LSC performance. The measured external quantum efficiencies at 450nm are 45% for a 100cm2 area and 32% for the LSC with an edge aspect ratio of 71. The device efficiency is 7.6%, the highest value ever reported, to the best of our knowledge. These findings may have industrial implications and could accelerate the commercialization of LSCs.
DOI: 10.1038/s41566-023-01366-y
Source: https://www.nature.com/articles/s41566-023-01366-y