The illumination angle dependency of CPV solar cell electrical performance

Bunthof, L.A.A.; Bos-Coenraad, J.; Corbeek, W.H.M.; Vlieg, Elias; Schermer, J.J.

doi:10.1016/j.solener.2017.01.026

Cited by 21 publications

(16 citation statements)

References 17 publications

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“…Those rays with more incident angle (e.g. with 50°) may be more difficulty absorbed by the TJ solar cell (García-Linares et al, 2014;Bunthof et al, 2017).…”

Section: Insteadmentioning

confidence: 99%

Optical modeling of four Fresnel-based high-CPV units

et al. 2017

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High Concentrator Photovoltaic (HCPV) units are typically based on the use of Fresnel lenses, refractive secondary optical elements (SOE), and triple-junction (TJ) solar cells. In this work, a detailed optical modeling is applied to analyze the performance of four Fresnel-based HCPV units equipped with different refractive SOEs while considering the subcells current density generation. Wavelength-dependent material properties are utilized while simulating the optical performance. The spectral response of a typical TJ solar cell is also included. This modeling allows to establish the subcell current limitation and the spectral matching ratio, SMR, values in each case. The following SOEs have been used for simulating the HCPV units: (i) Dielectric-cross compound-parabolic-concentrator (DCCPC), (ii) (SIngle-Lens-Optical element) SILO-Pyramid, (iii) Refractive truncated pyramid (RTP) and, (iv) Trumpet. Results show that the HCPV units with SOEs RTP and Trumpet, exhibit bottom subcell current limitation and lowest optical polychromatic efficiency, this is partly due to the irradiance absorption in the bottom cell spectral region and longer optical path length of the concentrated rays within the SOE material. In the case of the HCPV unit with the DCCPC SOE, top and bottom subcells limit the current generation alternatively depending on the misalignment angle of the HCPV unit respect to the simulated sunrays. None of the SMR parameters are equal to 1 under normal alignment of the HCPV units. The short-circuit current density distributions for each subcell in each case are studied under normal alignment and under 1°of misalignment angle.

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“…Those rays with more incident angle (e.g. with 50°) may be more difficulty absorbed by the TJ solar cell (García-Linares et al, 2014;Bunthof et al, 2017).…”

Section: Insteadmentioning

confidence: 99%

Optical modeling of four Fresnel-based high-CPV units

et al. 2017

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“…Capturing light re-emitted under these unfavorable angles requires expensive dichroic coatings 22 – 29 and causes multiple reflections and reabsorption losses as well as inefficient incident angles at the photovoltaic devices 30 , 31 . To prevent inefficient angles, LSCs have also been proposed that are based on pigments with purposely oriented transition dipole moments enabling direction of the light into much more favorable angle ranges.…”

Section: Introductionmentioning

confidence: 99%

Biomimetic light-harvesting funnels for re-directioning of diffuse light

et al. 2018

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Efficient sunlight harvesting and re-directioning onto small areas has great potential for more widespread use of precious high-performance photovoltaics but so far intrinsic solar concentrator loss mechanisms outweighed the benefits. Here we present an antenna concept allowing high light absorption without high reabsorption or escape-cone losses. An excess of randomly oriented pigments collects light from any direction and funnels the energy to individual acceptors all having identical orientations and emitting ~90% of photons into angles suitable for total internal reflection waveguiding to desired energy converters (funneling diffuse-light re-directioning, FunDiLight). This is achieved using distinct molecules that align efficiently within stretched polymers together with others staying randomly orientated. Emission quantum efficiencies can be >80% and single-foil reabsorption <0.5%. Efficient donor-pool energy funneling, dipole re-orientation, and ~1.5–2 nm nearest donor–acceptor transfer occurs within hundreds to ~20 ps. Single-molecule 3D-polarization experiments confirm nearly parallel emitters. Stacked pigment selection may allow coverage of the entire solar spectrum.

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“…The principle of the sun vector estimation in the SC-CSS is based on the solar cell output current. Due to the cosine behavior of the solar cell (Bunthof et al, 2017), one of the cells installed on the sensor faces has a degree of freedom. Based on Pita et al (2014), at least, three currents of the solar cells are necessary for the sun vector estimation.…”

Section: Mathematical Background Of the Sc-cssmentioning

confidence: 99%

In-orbit calibration of the pyramid coarse sun sensor using Lyapunov-based conical maneuvers of the satellite: A new framework

Mafi

Saki

Bolandi

2023

Transactions of the Institute of Measurement and Control

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Due to the lightweight, inexpensive, and simplicity, coarse sun sensors (CSS) are an interesting part of the small satellites with low-earth orbit. However, the CSS drawbacks such as low accuracy and nonlinear distribution of the error contours through the sensor Field of View (FOV) apply a notable limitation in its application. This forces the literature to focus on laboratory or in-orbit calibration methods. The excellence of the in-orbit calibration in comparison with the laboratory cases is clear; however, the difficulty is to achieve enough data when the satellite is launched. To solve that, in this paper, a conical maneuver based on the Lyapunov theory is designed which causes the sunlight to cover the sensor FOV. After that, using the achieved rich data pack, the CSS calibration process, including the sensor misalignment, solar cells misalignment, and solar cells characteristic curve (Fresnel effect), is accomplished. Moreover, the results show that the combination of the new calibration methods with the iterative least square (ILS) algorithm leads to 0.89° accuracy through the FOV of 120°.

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The illumination angle dependency of CPV solar cell electrical performance

Cited by 21 publications

References 17 publications

Optical modeling of four Fresnel-based high-CPV units

Optical modeling of four Fresnel-based high-CPV units

Biomimetic light-harvesting funnels for re-directioning of diffuse light

In-orbit calibration of the pyramid coarse sun sensor using Lyapunov-based conical maneuvers of the satellite: A new framework

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