Performance Limits and Status of Single-Junction Solar Cells With Emphasis on CIGS

Topič, Marko; Geisthardt, Russell M.; Sites, James R.

doi:10.1109/jphotov.2014.2359135

Cited by 36 publications

(21 citation statements)

References 10 publications

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“…The practically-achieved solar window performance in factory-assembled framed window samples is near 50% of its theoretical limit. It is interesting to compare this result with the record-performing CIGS cells (η ≈ 20%), which themselves operate at nearly 65% of the Shockley-Queisser limit, which was reported in Reference [25].…”

Section: Electric Output Parameters At Peaksupporting

confidence: 57%

Spectrally-Selective Energy-Harvesting Solar Windows for Public Infrastructure Applications

2018

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A study of photovoltaic solar window technologies is reported and it focuses on their structural features, functional materials, system development, and suitability for use in practical field applications including public infrastructures and agricultural installations. Energy generation performance characteristics are summarized and compared to theory-limit predictions. Working examples of pilot-trial solar window-based installations are described. We also report on achieving electric power outputs of about 25 W p /m 2 from clear and transparent large-area glass-based solar windows.

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Section: Electric Output Parameters At Peaksupporting

confidence: 57%

Spectrally-Selective Energy-Harvesting Solar Windows for Public Infrastructure Applications

2018

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“…To analyze these trends, we evaluated two characteristic parameters for each material: (i) the current ratio j = J sc /J SQ , which indicates the degree of light coupling, absorption, and trapping in the active layer(s) of the cell, and also depends on the carrier collection efficiency; and (ii) the voltage ratio v = V oc /V SQ , which is primarily related to the degree of recombination of carriers in the bulk, surfaces, and interfaces. Together, the voltage ratio v and fill factor ratio f = FF/FF SQ indicate the total electrical limitations of a cell (6). A plot of j versus v × f for all evaluated materials ( Fig.…”

Section: Ideal and Record-efficiency Solar Cells Comparedmentioning

confidence: 99%

Photovoltaic materials: Present efficiencies and future challenges

Polman

Knight

Garnett

et al. 2016

Science

1,772

1,275

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Recent developments in photovoltaic materials have led to continual improvements in their efficiency. We review the electrical characteristics of 16 widely studied geometries of photovoltaic materials with efficiencies of 10 to 29%. Comparison of these characteristics to the fundamental limits based on the Shockley-Queisser detailed-balance model provides a basis for identifying the key limiting factors, related to efficient light management and charge carrier collection, for these materials. Prospects for practical application and large-area fabrication are discussed for each material.

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“…The high defect density of grain boundaries generally promotes recombination and reduces photovoltaic efficiency. However, thin film polycrystalline photovoltaics such as CdTe and Cu(In , Ga)Se 2 exhibit high efficiencies despite a large density of grain boundaries 3,4 . The unexpected high efficiency of these materials demonstrates the need for a fuller understanding of grain boundary properties, and their influence on the charge current and recombination.…”

Section: Introductionmentioning

confidence: 99%

Charged grain boundaries reduce the open-circuit voltage of polycrystalline solar cells—An analytical description

Gaury

Haney

2016

Journal of Applied Physics

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Analytic expressions are presented for the dark current-voltage relation J(V ) of a pn+ junction with positively charged columnar grain boundaries with high defect density. These expressions apply to non-depleted grains with sufficiently high bulk hole mobilities. The accuracy of the formulas is verified by direct comparison to numerical simulations. Numerical simulations further show that the dark J(V ) can be used to determine the open-circuit potential Voc of an illuminated junction for a given short-circuit current density Jsc. A precise relation between the grain boundary properties and Voc is provided, advancing the understanding of the influence of grain boundaries on the efficiency of thin film polycrystalline photovoltaics like CdTe and Cu(In, Ga)Se2.

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Performance Limits and Status of Single-Junction Solar Cells With Emphasis on CIGS

Cited by 36 publications

References 10 publications

Spectrally-Selective Energy-Harvesting Solar Windows for Public Infrastructure Applications

Spectrally-Selective Energy-Harvesting Solar Windows for Public Infrastructure Applications

Photovoltaic materials: Present efficiencies and future challenges

Charged grain boundaries reduce the open-circuit voltage of polycrystalline solar cells—An analytical description

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