Role of refractive index in highly efficient laminated luminescent solar concentrators

被引:30
|
作者
Liu, Guiju [1 ,2 ]
Mazzaro, Raffaello [3 ,4 ]
Sun, Changchun [2 ,5 ]
Zhang, Yuanming [2 ,5 ]
Wang, Yiqian [1 ,2 ]
Zhao, Haiguang [1 ,2 ]
Han, Guangting [2 ,5 ]
Vomiero, Alberto [3 ,6 ]
机构
[1] Qingdao Univ, Coll Phys, 308 Ningxia Rd, Qingdao 266071, Peoples R China
[2] Qingdao Univ, State Key Lab Biofibers & Ecotext, 308 Ningxia Rd, Qingdao 266071, Peoples R China
[3] Lulea Univ Technol, Dept Engn Sci & Math, Div Mat Sci, S-97187 Lulea, Sweden
[4] CNR IMM, Via Piero Gobetti 101, I-40129 Bologna, Italy
[5] Qingdao Univ, Coll Text & Clothing, 308 Ningxia Rd, Qingdao 266071, Peoples R China
[6] Ca Foscari Univ Venice, Dept Mol Sci & Nanosyst, Via Torino 155, I-30172 Mestre Venezia, Italy
关键词
CdSe/CdS quantum dots; Luminescent solar concentrators; Laminated structure; Refractive index; External optical efficiency; QUANTUM DOTS; CARBON DOTS; NANOCRYSTALS; REABSORPTION;
D O I
10.1016/j.nanoen.2020.104470
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
As a large-area solar radiation collector, luminescent solar concentrators (LSCs) can be used as power generation units in semitransparent solar windows, modernized agricultural greenhouses and building facades. However, the external optical efficiency and long-term stability of the LSCs limit their practical applications due to the sensitivity of the emitters to the light and environmental conditions. Here, we used the concept of "laminated glass" to prepare LSCs, which consist of two waveguide layers and the quantum dots (QDs)/polymer interlayer, and we tune the refractive index of the different parts of the system to improve the external optical efficiency and stability of the LSCs, simultaneously. The waveguide layer can be glass, quartz, polymethyl methacrylate (PMMA) and other transparent materials. The CdSe/CdS core/shell QDs were used as fluorophores to prepare the interlayer of the LSCs. The external optical efficiency of the laminated LSCs is associated with the refractive index of the three layers: the closer the refractive index, the higher the eta(opt). The highest external optical efficiency of 3.4% has been achieved for the laminated PMMA/QDs-polymer/PMMA LSCs, which improved similar to 92% compared to the single-layered CdSe/CdS based LSCs. To the best of our knowledge, this is the highest efficiency for the LSCs based on CdSe/CdS QDs. These results pave the way to realize high efficiency laminated windows as power generation units by suitably tuning the structure of the LSC, and provide the theoretical guidance for the LSCs utilized in building integrated photovoltaics.
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页数:9
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