Effect of back-contact barrier on thin-film CdTe solar cells

Demtsu, S.H.; Sites, James R.

doi:10.1016/j.tsf.2006.01.004

Cited by 213 publications

(116 citation statements)

References 5 publications

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“…While the metal back-contact layer is necessary for collection of photo-generated carriers, it also helps to increase the light absorption by increasing the path length as the incident light bounces back [22]. The anti-reflection coating layer on the top increases the coupling of the incident light to the solar cell [23].…”

Section: Eot Based Solar Cell Structurementioning

confidence: 99%

“…The metal fingers on the top of anti-reflection coating layer creates a shaded region in active layer, and thereby, reduces the light absorption by ∼10% [24]. The effects of the metal back-contact layer, the anti-reflection coating layer, and the metal fingers are well known and have been investigated in detail [22][23][24].…”

Section: Eot Based Solar Cell Structurementioning

confidence: 99%

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Management of light absorption in extraordinary optical transmission based ultra-thin-film tandem solar cells

Mashooq

Talukder

2016

Journal of Applied Physics

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Although ultra-thin-film solar cells can be attractive in reducing the cost, they suffer from low absorption as the thickness of the active layer is usually much smaller than the wavelength of incident light. Different nano-photonic techniques, including plasmonic structures, are being explored to increase the light absorption in ultra-thin-film solar cells.More than one layer of active materials with different energy bandgaps can be used in tandem to increase the light absorption as well. However, due to different amount of light absorption in different active layers, photo-generated currents in different active layers will not be the same. The current mismatch between the tandem layers makes them 1 ineffective in increasing the efficiency. In this work, we investigate the light absorption properties of tandem solar cells with two ultra-thin active layers working as two subcells and a metal layer with periodically perforated holes in-between the two subcells. While the metal layer helps to overcome the current mismatch, the periodic holes increase the absorption of incident light by helping extraordinary optical transmission of the incident light from the top to the bottom subcell, and by coupling the incident light to plasmonic and photonic modes within ultra-thin active layers. We extensively study the effects of the

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Section: Eot Based Solar Cell Structurementioning

confidence: 99%

Section: Eot Based Solar Cell Structurementioning

confidence: 99%

Management of light absorption in extraordinary optical transmission based ultra-thin-film tandem solar cells

Mashooq

Talukder

2016

Journal of Applied Physics

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“…4, a parallel combination of forward-biased diodes is used to independently simulate recombination currents in the quasi neutral (JQNR) and space charge (JSCR). The back contact behavior is represented by the parallel combination of a reverse-biased diode (Jb) and shunt conductance (1/Rb) that was previously used to model performance characteristics observed in the first quadrant [12]. The theoretical basis for the two-diode model as a general expression for the current produced in a solar cell can be found in Ref.…”

Section: J-v Curve Modelingmentioning

confidence: 99%

“…[13]. When the barrier height, Eb, associated with the back contact is low (Eb < 0.5 eV, Jb >100 mA/cm 2 ), the back contact impact on 4th quadrant behaviour, is minimized [12] such that the current-density, J, and voltage, V, of the solar cell is represented by: (2) where JSCR, JQNR, and Jph are the recombination currents and photo generated current respectively, while Rs and Rsh represent series and parallel (shunt) resistance losses. JSCR and JQNR are further represented by the following:…”

Section: J-v Curve Modelingmentioning

confidence: 99%

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The use of 2<sup>nd</sup> and 3<sup>rd</sup> level correlation analysis for studying degradation in polycrystalline thin-film solar cells

Albin

Cueto

Demtsu³

et al. 2010

2010 35th IEEE Photovoltaic Specialists Conference

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The correlation of stress-induced changes in the performance of laboratory-made CdTe solar cells with various 2 nd and 3 rd level metrics is discussed. The overall behavior of aggregated data showing how cell efficiency changes as a function of open-circuit voltage (Voc), shortcircuit current density (Jsc), and fill factor (FF) is explained using a two-diode, PSpice model in which degradation is simulated by systematically changing model parameters. FF shows the highest correlation with performance during stress, and is subsequently shown to be most affected by shunt resistance, recombination and in some cases voltage-dependent collection. Large decreases in Jsc as well as increasing rates of Voc degradation are related to voltage-dependent collection effects and catastrophic shunting respectively. Large decreases in Voc in the absence of catastrophic shunting are attributed to increased recombination. The relevance of capacitancederived data correlated with both Voc and FF is discussed.

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Modeling the Device Physics of Chalcogenide Thin Film Solar Cells

Gorji

Kuhn

2018

Photovoltaic Modeling Handbook

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Effect of back-contact barrier on thin-film CdTe solar cells

Cited by 213 publications

References 5 publications

Management of light absorption in extraordinary optical transmission based ultra-thin-film tandem solar cells

Management of light absorption in extraordinary optical transmission based ultra-thin-film tandem solar cells

The use of 2<sup>nd</sup> and 3<sup>rd</sup> level correlation analysis for studying degradation in polycrystalline thin-film solar cells

Modeling the Device Physics of Chalcogenide Thin Film Solar Cells

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