Design improvements for the polyhedral specular reflector spectrum-splitting module for ultra-high efficiency (>50%)

2014 ◽  
Author(s):  
Carissa N. Eisler ◽  
Emily C. Warmann ◽  
Cristofer A. Flowers ◽  
Michelle Dee ◽  
Emily D. Kosten ◽  
...  
Keyword(s):  
High Efficiency ◽  
Spectrum Splitting ◽  
Specular Reflector

scholarly journals Polyhedral specular reflector design for ultra high spectrum splitting solar module efficiencies (>50%)

2013 ◽  
Author(s):  
Carissa N. Eisler ◽  
Emily D. Kosten ◽  
Emily C. Warmann ◽  
Harry A. Atwater
Keyword(s):  
Solar Module ◽  
Spectrum Splitting ◽  
Specular Reflector

Solar Spectrum Splitting Parallel Junction High Efficiency Concentrating Photovoltaics

2012 ◽  
Vol 1391 ◽  
Author(s):  
Lirong Z. Broderick ◽  
Marco Stefancich ◽  
Dario Roncati ◽  
Brian R. Albert ◽  
Xing Sheng ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Linear Array ◽  
Low Cost ◽  
Spectral Band ◽  
Solar Spectrum ◽  
Optical Loss ◽  
Single Element ◽  
Si Substrate ◽  
Spectrum Splitting

ABSTRACTA compact, single element concentrator comprising a near linear array of prisms has been designed to simultaneously split and concentrate the solar spectrum. Laterally aligned solar cells with different bandgaps are devised to be fabricated on a common Si substrate, with each cell absorbing a different spectral band optimized for highest overall power conversion efficiency. Epitaxial Ge on Si is used as a low cost virtual substrate for III-V materials growth. Assuming no optical loss for the prism concentrator, no shadowing and perfect carrier collection for the solar cells, simulations show that 39% efficiency can be achieved for a parallel four-junction (4PJ) InGaP-GaAs-Si-Ge cell under 200X concentration, and higher efficiency is possible with more junctions.

High Efficiency Solar to Electric Energy Conversion through Spectrum Splitting and Multi-channel Full Spectrum Harvesting

2013 ◽  
Vol 1493 ◽  
pp. 31-36 ◽  
Author(s):  
Lirong Zeng Broderick ◽  
Tiejun Zhang ◽  
Marco Stefancich ◽  
Brian R. Albert ◽  
Evelyn Wang ◽  
...  
Keyword(s):  
Electricity Generation ◽  
High Efficiency ◽  
Waste Heat ◽  
Electric Energy ◽  
Solar Spectrum ◽  
Thermal Storage ◽  
High Energy ◽  
Optimized Design ◽  
Full Spectrum ◽  
Spectrum Splitting

ABSTRACTA system combining photovoltaic (PV) and solar thermal approaches is designed to convert solar energy to electricity with high efficiency across the full solar spectrum. Concentrated solar spectrum is split into two parts: PV and thermal. The PV part of the spectrum is further split into several subbands directed to bandgap appropriate solar cells on an inexpensive Si substrate. Epitaxial Ge on Si is used as a virtual substrate for III-V semiconductor growth. At long and very short wavelengths where PV efficiency is low, solar radiation is directed to a high temperature thermal storage tank for electricity generation using heat engines. The potential of using PV waste heat due to thermalization of high energy photoelectrons for electricity generation is also investigated. Detailed optical and thermal analysis show that with optimized design and neglecting optical component loss, system power conversion efficiency can reach 56%, including more than 16% absolute contribution from thermal storage.

scholarly journals Visible-Frequency Metasurfaces for Broadband Anomalous Reflection and High-Efficiency Spectrum Splitting

Nano Letters ◽  
2015 ◽  
Vol 15 (3) ◽  
pp. 1615-1621 ◽  
Author(s):  
Zhongyang Li ◽  
Edgar Palacios ◽  
Serkan Butun ◽  
Koray Aydin
Keyword(s):  
High Efficiency ◽  
Spectrum Splitting ◽  
Anomalous Reflection ◽  
Visible Frequency
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