High‐Concentration, III–V Multijunction Solar Cells

Kinsey, Geoffrey S.

doi:10.1002/9780470636886.ch13

Cited by 13 publications

(7 citation statements)

References 13 publications

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“…Literature based data from Kinsey andEdmondson (2009) andSegev et al (2012) are used in the EM. The CR discussed in this section is for 500Â unless otherwise stated.…”

Section: Resultsmentioning

confidence: 99%

“…MJ solar cells are usually characterised in laboratory facilities under Concentrator Standard Test Conditions (CSTC). These conditions correspond to cell temperature T c = 25°C, air mass 1.5 direct (AM1.5D) and Direct Normal Irradiance DNI = 1 kW/m 2 , although in the field, the atmospheric conditions can vary significantly (Kinsey, 2010). Due to the fact that the subcells of the 3J solar cell are monolithically connected and also because of their sensitivity to the spectral variations and intensity of sunlight, the prediction of the electrical and thermal behaviour is still challenging .…”

Section: Introductionmentioning

confidence: 98%

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Electrical-thermal analysis of III–V triple-junction solar cells under variable spectra and ambient temperatures

2015

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The influence of the incident spectral irradiance on the electrical and thermal behaviour of triple-junction solar cells has been investigated. A spectral dependent electrical model has been developed to calculate the electric characteristics and quantify the heat power of a multijunction solar cell. A three-dimensional finite element analysis is also used to predict the solar cell's operating temperature and cooling requirements for a range of ambient temperatures. The combination of these models improves the prediction accuracy of the electrical and thermal behaviour of triple-junction solar cells. The convective heat transfer coefficient between the back-plate and ambient air was found to be the significant parameter in achieving high electrical efficiency. These data are important for the electrical and thermal optimisation of concentrating photovoltaic systems under real conditions. The objective of this work is to quantify the temperature and cooling requirements of multijunction solar cells under variable solar spectra and ambient temperatures. It is shown that single cell configurations with a solar cell area of 1 cm 2 can be cooled passively for concentration ratios of up to 500Â with a heat sink thermal resistance below 1.63 K/W, however for high ambient temperatures (greater than 40°C), a thermal resistance less than 1.4 K/W is needed to keep the solar cell operating within safe operating conditions.

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“…Literature based data from Kinsey andEdmondson (2009) andSegev et al (2012) are used in the EM. The CR discussed in this section is for 500Â unless otherwise stated.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Electrical-thermal analysis of III–V triple-junction solar cells under variable spectra and ambient temperatures

2015

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“…Field data from these installations, including meteorological data such as DNI, air turbidity, and spectral irradiance, have been used to inform ongoing system optimization. A performance model has been developed that predicts system output based on the spectral response of the III–V multijunction cell corrected for temperature, air turbidity, spectral irradiance, transmission losses, soiling, and various module‐ and system‐level interconnection losses 1. Spectral irradiance for target locations was generated using the NREL SMARTS model 2.…”

Section: Results and Analysismentioning

confidence: 99%

Energy prediction of Amonix CPV solar power plants

Kinsey¹,

Stone²,

Brown³

et al. 2010

Progress in Photovoltaics

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Amonix concentrating photovoltaic (CPV) solar power plants currently demonstrate AC efficiency of over 25% in the field. A model has been developed that predicts system performance based on the spectral response of the III–V multijunction cell corrected for environmental and atmospheric conditions. Historical meteorological data is used to predict future performance at target locations. With the cleaning schedule as the only adjustable variable, energy production has been within 2% of prediction after 9 months of operation. The model is used to improve performance, which is expected to increase by 10% in 2010. These improvements, combined with cost reductions in the MegaModule® design, put the Amonix CPV systems on track to achieve a levelized cost of electricity below US $100/MW‐hr by 2012. Copyright © 2010 John Wiley & Sons, Ltd.

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“…Si 1−x Ge x in microelectronics [1,2], Ga 1−x In x N for blue light-emitting diodes [3], or Cd 1−x Zn x Te for radiation detectors [4]. In photovoltaics, the solar cells with the highest conversion efficiencies above 40 % are multijunction devices with many layers of carefully engineered III-V alloys grown on a Ge substrate [5]. Whereas isovalent alloying typically employs compositions from a few per cent up to equal amounts of the constituents, so to modify the bandstructure and optical properties, non-isovalent impurity doping [6] is used to tailor the electrical properties via more dilute substitutions ranging from parts per million (∼10 16 cm −3 ) up to few per cent in transparent conducting oxides [7].…”

Section: Introductionmentioning

confidence: 99%

Composition Dependence of the Band Gap and Doping inCu2O-Based Alloys as Predicted by an Extension of the Dilute-Defect Model

2014

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Tuning the opto-electronic properties through alloying is essential for semiconductor technology. Currently, mostly isovalent and isostructural alloys are used (e.g., group-IV and III-V), but a vast and unexplored space of novel functional materials is conceivable when considering more complex alloys by mixing aliovalent and heterostructural constituents. The real challenge lies in the quantitative property prediction for such complex alloys to guide their experimental exploration. We developed an approach to predict compositional dependence of both band-structure and electrical properties from ab-initio calculations by extending conventional dilute defect model to higher (alloy) concentrations. Considering alloying of aliovalent (Mg, Zn, Cd) cations and isovalent anions (S, Se) into Cu2O, we predict tunability of band-gap energies and doping levels over a wide range, including the type conversion from p-to n-type. Initial synthesis and characterization of Zn and Se substituted Cu2O support the defect model, suggesting these alloys as promising novel oxide semiconductor materials. Cu-poor (Cu 2 O/CuO)Cu-rich (Cu 2 O/Cu)

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High‐Concentration, III–V Multijunction Solar Cells

Cited by 13 publications

References 13 publications

Electrical-thermal analysis of III–V triple-junction solar cells under variable spectra and ambient temperatures

Electrical-thermal analysis of III–V triple-junction solar cells under variable spectra and ambient temperatures

Energy prediction of Amonix CPV solar power plants

Composition Dependence of the Band Gap and Doping inCu2O-Based Alloys as Predicted by an Extension of the Dilute-Defect Model

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