Compact spectrum splitter for laterally arrayed multi-junction concentrator photovoltaic modules

Li, Duanhui; Michel, Jürgen; Hu, Juejun; Gu, Tian

doi:10.1364/ol.44.003274

Cited by 8 publications

(6 citation statements)

References 22 publications

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“…[ 86 ] As with chiplet printing, this approach can also be used for the assembly of multiple devices close to each other with high precision. This is shown for the laterally arrayed micro‐cells in conjunction with spectral splitting optics developed by MIT [ 87,88 ] seen in Figure 8B.…”

Section: New Enabling Technologies For Micro Cpvmentioning

confidence: 88%

Integrated Micro‐Scale Concentrating Photovoltaics: A Scalable Path Toward High‐Efficiency, Low‐Cost Solar Power

Jost

Juejun

et al. 2023

Solar RRL

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The global energy market is seeing increases in the electricity demand of a couple of percentage points annually. The photovoltaic (PV) industry is also growing rapidly every year. One of the PV technologies is concentrator photovoltaics (CPV). CPV uses high‐efficiency multijunction solar cells and optics to concentrate sunlight, thereby significantly reducing the amount of semiconductor material needed. Yet, due to the high upfont manufacturing cost of CPV, it currently does not offer a competitive price against silicon PV. With this a new branch is introduced to the industry, micro‐CPV, which can be broadly explained as the miniaturization of the solar cells and optical components. The motivation for micro‐CPV is lowering the cost by decreasing the material volume and enabling new system architectures and high‐throughput manufacturing methods, while still maintaining high electrical efficiencies, taking advantage of a lower thermal load, shorter optical paths, lower resistive losses, and lower material volumes. Herein, a comprehensive review of the technological advances is presented, key synergies between micro‐CPV and other industries sharing similar challenges are identified, exemplified by micro‐light emitting diodes display manufacturing. New assembly process development in these industries will facilitate commercial adoption of micro‐CPV with continued miniaturization while driving down the cost.

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Section: New Enabling Technologies For Micro Cpvmentioning

confidence: 88%

Integrated Micro‐Scale Concentrating Photovoltaics: A Scalable Path Toward High‐Efficiency, Low‐Cost Solar Power

Jost

Juejun

et al. 2023

Solar RRL

Self Cite

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“…The technique was useful in closed spaces without natural light Average exergy and energy efficiency: 9% and 15% Lighting efficiency: 347 Lm W −1 , efficiency of lightning: 14% ± 0.03 Stirling engine rotation speed: 350-1010 rpm, hot temp: 175-257 °C [84] Study: Experimental +simulation Cut-off wavelength: 900 nm CR: 1000 suns Tracking system: Two-axis tracker Splitter type: -A PV/cascade TEG using splitting under different concentration ratios TEG efficiency: 8%, PV cell efficiency: 44% The overall efficiency of the hybrid system is 35% Material type and height influenced the whole system Under 880 W m −2 irradiance, PV and TEG achieved 22 W and 1.9 W power, respectively [56] Study: Theoretical/Experimental Cut-off wavelength: 440 nm, 510 nm, 650 nm CR: 50 suns, 232 suns, 256 suns Tracking system: Two-axis tracker Splitter type: Micro prism A multi-junction CPV system using 4 prisms as a beam splitter Efficiency for InGaP, GaAs, InGaAs: 15.38%, 18.57%, 12.1% Cell sizes were optimized using 3-D ray tracing to increase total efficiency…”

Section: System Specifications Applicationmentioning

confidence: 99%

“…Li et al. [ 56 ] developed spectrum‐splitting optics based on micro‐prism arrays for high‐efficiency and compact micro‐CPV modules. Without antireflection coatings, the dual‐function optics demonstrated a focused optical transmission of 80.9% (model) and 74.9% (experiment).…”

Section: Spectrum Splitting Techniquesmentioning

confidence: 99%

Adaptation of the Solar Spectrum to Improve the use of Sunlight: A Critical Review on Techniques, Applications, and Current Trends

Kandil

Salem

Awad

et al. 2023

Advanced Sustainable Systems

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Photovoltaic (PV) cells are one of the most common devices to harvest solar radiation and convert it into usable electrical power. However, normal silicone‐based photovoltaic cells work best within the visible light region. Conventional PV panels can use 15–30% of the total energy received, while the remainder is reflected or converted into waste heat. Not only do other wavelengths have lower conversion efficiencies, but they may also increase the cell surface temperature and decrease its overall efficiency. To solve this problem, spectral beam splitting is a potential approach for converting solar energy efficiently. Even though spectral‐splitting systems have high theoretical conversion efficiencies, they have not yet reached the commercial level. The current study describes the advancements in beam‐splitting systems based on thermal PV cells, multijunction cells, nano‐film, conventional, and nanofluids over the last decade. The mechanisms of various splitting system techniques and several hybrid applications are thoroughly discussed in order to provide a comprehensive understanding of solar energy utilization and the considerations influencing system efficiency. Even though the cost increase can be offset by the increased energy conversion efficiency and controlled wavelengths, the system's stability must be addressed for future practical applications.

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“…Thus, the shadow effect becomes unavoidable. The second kind of alignment arranges multiple receivers with different optical axes [16][17][18][19]. In this arrangement, the sunlight receivers can be photovoltaic cells with different absorption bands and lateral arrangements [12,13].…”

Section: Introductionmentioning

confidence: 99%

A Side-Absorption Concentrated Module with a Diffractive Optical Element as a Spectral-Beam-Splitter for a Hybrid-Collecting Solar System

2020

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In this paper, we propose a side-absorption concentrated module with diffractive grating as a spectral-beam-splitter to divide sunlight into visible and infrared parts. The separate solar energy can be applied to different energy conversion devices or diverse applications, such as hybrid PV/T solar systems and other hybrid-collecting solar systems. Via the optimization of the geometric parameters of the diffractive grating, such as the grating period and height, the visible and the infrared bands can dominate the first and the zeroth diffraction orders, respectively. The designed grating integrated with the lens and the light-guide forms the proposed module, which is able to export visible and infrared light individually. This module is demonstrated in the form of an array consisting of seven units, successfully out-coupling the spectral-split beams by separate planar ports. Considering the whole solar spectrum, the simulated and measured module efficiencies of this module were 45.2% and 34.8%, respectively. Analyses of the efficiency loss indicated that the improvement of the module efficiency lies in the high fill-factor lens array, the high-reflectance coating, and less scattering.

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Compact spectrum splitter for laterally arrayed multi-junction concentrator photovoltaic modules

Cited by 8 publications

References 22 publications

Integrated Micro‐Scale Concentrating Photovoltaics: A Scalable Path Toward High‐Efficiency, Low‐Cost Solar Power

Integrated Micro‐Scale Concentrating Photovoltaics: A Scalable Path Toward High‐Efficiency, Low‐Cost Solar Power

Adaptation of the Solar Spectrum to Improve the use of Sunlight: A Critical Review on Techniques, Applications, and Current Trends

A Side-Absorption Concentrated Module with a Diffractive Optical Element as a Spectral-Beam-Splitter for a Hybrid-Collecting Solar System

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