期刊
JOURNAL OF LUMINESCENCE
卷 231, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jlumin.2020.117837
关键词
Luminescent solar concentrator; Large Stokes shift; Intramolecular charge transfer; Indoor/outdoor illumination; Aesthetics
类别
资金
- National Research Foundation of the Republic of Korea (NRF) - Korea government (MSIT) [2019R1A2C1005805]
- Korea Institute of energy technology evaluation and planning (KETEP)
- ministry of trade, industry & energy (MOTIE) of the Republic of Korea [20194030202320]
- National Research Foundation of Korea [2019R1A2C1005805] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
By utilizing a donor-acceptor luminophore with a large Stokes shift, this study successfully developed large-area LSCs that perform well under both indoor and outdoor illumination conditions, achieving high optical efficiency. The LSCs are suitable for the built environment, meeting aesthetic and visual comfort parameters.
Luminescent solar concentrators (LSCs) are light-guides doped with luminophores that can spectrally and spatially concentrate solar radiation. With the ability to harvest both direct and diffuse light, LSCs are considered attractive prospects for building-integrated photovoltaic applications. However, it is still challenging to develop organic luminophores based large-area LSCs that work well in various illumination conditions. Reabsorption, caused by small stokes shift of typical organic luminophores, often limits the performance of large-area LSCs. This study reports an indoor and outdoor performance of large-area (>= 100 cm(2)) LSCs that employ a donoracceptor luminophore with a large Stokes shift. The largest (400 cm(2)) LSC demonstrates an optical efficiency (eta(opt)) of 5.5% and 7.6% under outdoor (AM 1.5G) and indoor (white LED) illuminations, respectively. Furthermore, the aesthetic and visual comfort parameters such as chromaticity coordinates, color rendering index, and average visible transmission are obtained that suggest the suitability of our LSCs for a built environment.
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