Estimation of multi‐junction solar cell parameters

Or, A. Ben; Appelbaum, J.

doi:10.1002/pip.2158

Cited by 56 publications

(20 citation statements)

References 12 publications

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“…Despite the fact that several electrical models and experimental procedures for MJ solar cells have been described thoroughly in literature (Ben Or and Appelbaum, 2013;Dominguez et al, 2010;Fernández et al, 2013;Fernandez et al, 2013b;Kinsey and Edmondson, 2009;Kinsey et al, 2008;Rodrigo et al, 2013;Segev et al, 2012;Siefer and Bett, 2014) which included the spectrum and irradiance dependence, the challenge to develop an integrated thermal-electrical model which predicts the cell temperature and includes the cooling needs is still unsolved. This study builds on a methodology (Theristis and O'Donovan, 2014) which considered a constant spectral response at 25°C and AM1.5D.…”

Section: Abbreviationsmentioning

confidence: 99%

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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Section: Abbreviationsmentioning

confidence: 99%

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

2015

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“…Some investigators have proposed different methods to obtain the parameters of the subcells by making different assumptions and simplifications. Examples of extraction methods based on the SEM scheme can be found in the literature [46,55,59,[66][67][68] as can results from those based on the DEM scheme [59,[69][70][71]. It is important to note that these studies usually estimate the parameters at a particular set of operating conditions.…”

Section: Influence Of Optical Concentrationmentioning

confidence: 99%

Multijunction Concentrator Solar Cells: Analysis and Fundamentals

Férnández

García‐Loureiro

Smestad

2015

High Concentrator Photovoltaics

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Multijunction (MJ) concentrator solar cells are primarily constructed of III-V semiconductor materials. The high solar-conversion efficiencies of these devices are dependent on precise control of growth conditions using one of several techniques such as molecular beam epitaxy, metal organic chemical vapour, or metal organic vapour-phase epitaxy deposition. The use of several junctions in an MJ tandem stack allows these devices to achieve efficiencies that are not possible for single-junction devices. Their behaviour is consequently complex, but it can be understood through an examination of the external quantum efficiency and the temperature dependence of each cell in the stack. This chapter lays out a systematic approach for understanding the spectral and temperature dependence of the overall MJ device by way of consideration of its component subcells. The efficiency of the cell as a function of temperature and concentration is described for both lattice-matched and metamorphic triple-junction (TJ) solar cells. The electrical characteristics and current-voltage curves are described from these considerations, and the performance of MJ solar cells under real operating conditions are then presented by considering a term describing the overall thermal factor and another term for the spectral factor. These terms can be understood from the background presented in the previous sections. Finally, the power output for the complete cell incorporated into a Fresnel lens based high-concentration photovoltaic system is presented for a particular geographic location using meteorological data.

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“…It was reported that the solar cell one-diode equivalent circuit is able to characterize the experimental I-V curves of a triple-junction solar cell in an HCPV receiver [35]. This equivalent circuit depends on five parameters: photocurrent (I ph ), saturation current (I 0 ), diode ideality factor (m), series resistance (R s ) and shunt resistance (R sh ).…”

Section: Unshaded Receiver Blockmentioning

confidence: 99%

Shading in High-Concentrator Photovoltaic Power Plants

Rodrigo

Gutiérrez

Guerrero

2015

High Concentrator Photovoltaics

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The electrical behavior of high concentrator photovoltaic power plants is affected by self-shading between solar trackers. Partial shading of the concentrator modules on a tracker causes complex effects in the output I-V characteristics. Shadows affect the behavior of the basic component of a concentrator photovoltaic generator, the solar receiver integrated with primary optics, and the electrical connection of receivers with different behavior distortions the system output. In this chapter, measurements of concentrator receivers integrated with partially shaded primary optics are analyzed to understand their electrical behavior and a methodology for characterizing the I-V curve of shaded high concentrator photovoltaic generators under given environmental conditions is described and compared with experimental data. This methodology can be used for carrying out different studies on shading in high concentrator photovoltaic power plants. For instance, time domain simulations that calculate the I-V characteristic curve of a concentrator photovoltaic generator at small time steps can be implemented. These simulations can be used for calculating shading energy losses in grid-connected high concentrator photovoltaic systems or for analyzing important aspects in the design of these plants, such as optimum trackers allocation or inverters configuration. The problem of optimizing trackers allocation is also approached in this chapter with a simplified method based on balancing irradiation losses with energy losses in wires and costs of the land.

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Estimation of multi‐junction solar cell parameters

Cited by 56 publications

References 12 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

Multijunction Concentrator Solar Cells: Analysis and Fundamentals

Shading in High-Concentrator Photovoltaic Power Plants

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