Review of grain interior, grain boundary, and interface effects of K in CIGS solar cells: Mechanisms for performance enhancement

Muzzillo, Christopher P.

doi:10.1016/j.solmat.2017.07.006

Cited by 84 publications

(85 citation statements)

References 80 publications

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“…Heavier alkali dopants also happen to be displaced to and from surfaces and grain boundaries, depending on temperature and relative concentration. 8,10,68 This phenomenon is not clear yet, but it has obvious implications on the more recent strategy for efficiency enhancement with heavier alkali metals 24 (cf. Fig.…”

Section: The Hound: Gallium Gradingmentioning

confidence: 99%

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The fox and the hound: in-depth and in-grain Na doping and Ga grading in Cu(In,Ga)Se₂ solar cells

et al. 2020

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Section: The Hound: Gallium Gradingmentioning

confidence: 99%

“…1b. (c) The post deposition treatment (PDT) with heavier alkali metal uorides (KF, [8][9][10] RbF and CsF 11 ), Fig. 1c.…”

Section: Introductionmentioning

confidence: 99%

The fox and the hound: in-depth and in-grain Na doping and Ga grading in Cu(In,Ga)Se₂ solar cells

et al. 2020

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“…Although alkali metal incorporation is beneficial, its primary role is somewhat different . Sodium mainly affects the carrier concentration and improves the open‐circuit voltage ( V OC ) . On the other hand, as compared to the incorporation of Na, the incorporation of K and Rb is less effective in increasing the carrier concentration in CIGSe .…”

Section: Comparison Of the Device Parameters Of Cigse Thin Films Subjmentioning

confidence: 99%

“…On the other hand, as compared to the incorporation of Na, the incorporation of K and Rb is less effective in increasing the carrier concentration in CIGSe . Furthermore, KF and Rb‐PDT modify the surface morphology of CIGSe and increase the V OC by changing the energy band diagrams at the buffer/CIGSe interface and grain boundaries (GBs) on the CIGSe thin‐film surface . In addition, the modified surface promotes large coverage of the buffer layer and results in an increase in the short‐circuit current ( J SC ) by reducing the thickness of the buffer layer .…”

Section: Comparison Of the Device Parameters Of Cigse Thin Films Subjmentioning

confidence: 99%

“…The CIGSe cells with combined alkali‐PDT exhibited a much longer carrier lifetime ( τ = 47.2 ns) compared to the other cells. This increased carrier lifetime is also thought to be an effect of the cooperative alkali incorporation on the bulk, which might be due to a grain interior modified by K and GB defects passivated by Cs.…”

Section: Comparison Of the Device Parameters Of Cigse Thin Films Subjmentioning

confidence: 99%

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Effect of Combined Alkali (KF + CsF) Post‐Deposition Treatment on Cu(InGa)Se₂ Solar Cells

Kim

Tampo

Shibata

et al. 2018

Physica Rapid Research Ltrs

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This study reveals combined alkali (KF + CsF) post‐deposition treatment (PDT) effects on a Cu(InGa)Se2 (CIGSe) cell. Three different alkali‐PDTs (KF, CsF, and combined KF + CsF) on CIGSe thin films have been performed. The CIGSe cell with KF‐PDT exhibits further reduction in the recombination at the CdS/buffer interface, whereas the CIGSe cell with CsF‐PDT exhibits further reduction in the recombination in bulk. In addition, the CIGSe cell with combined alkali‐PDT exhibits reduced recombination at both the CdS/CIGSe interface and in bulk compared to all other cells. By applying the combined alkali‐PDT, a highly efficient CIGSe device with 20.15% is achieved.

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Controllable Double Gradient Bandgap Strategy Enables High Efficiency Solution‐Processed Kesterite Solar Cells

Zhao,

Chen,

Ishaq

et al. 2023

Adv Funct Materials

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The double gradient bandgap absorber has the potential to enhance carrier collection, improve light collection efficiency, and make the performance of solar cells more competitive. However, achieving the double gradient bandgap structure is challenging due to the comparable diffusion rates of cations during high‐temperature selenization in kesterite Cu2ZnSn(S,Se)4 (CZTSSe) films. Here, it has successfully achieved a double gradient bandgap in the CZTSSe absorber by spin‐coating the K2S solution during the preparation process of the precursor film. The K2S insertion serves as an additional S source for the absorber, and the high‐affinity energy of K‐Se causes the position of the spin‐coated K2S solution locally Se‐rich and S‐poor. More importantly, the position of the bandgap minimum (notch) and the depth of the notch can be controlled by varying the concentration of K2S solution and its deposition stage, thereby avoiding the electronic potential barrier produced by an inadvertent notch position and depth. In addition, the K─Se liquid phase expedites the selenization process to the elimination of the fine grain layer. The champion CZTSSe device achieved an efficiency of 13.70%, indicating the potential of double gradient bandgap engineering for the future development of high‐efficiency kesterite solar cells.

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Review of grain interior, grain boundary, and interface effects of K in CIGS solar cells: Mechanisms for performance enhancement

Cited by 84 publications

References 80 publications

The fox and the hound: in-depth and in-grain Na doping and Ga grading in Cu(In,Ga)Se₂ solar cells

The fox and the hound: in-depth and in-grain Na doping and Ga grading in Cu(In,Ga)Se₂ solar cells

Effect of Combined Alkali (KF + CsF) Post‐Deposition Treatment on Cu(InGa)Se₂ Solar Cells

Controllable Double Gradient Bandgap Strategy Enables High Efficiency Solution‐Processed Kesterite Solar Cells

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Review of grain interior, grain boundary, and interface effects of K in CIGS solar cells: Mechanisms for performance enhancement

Cited by 84 publications

References 80 publications

The fox and the hound: in-depth and in-grain Na doping and Ga grading in Cu(In,Ga)Se2 solar cells

The fox and the hound: in-depth and in-grain Na doping and Ga grading in Cu(In,Ga)Se2 solar cells

Effect of Combined Alkali (KF + CsF) Post‐Deposition Treatment on Cu(InGa)Se2 Solar Cells

Controllable Double Gradient Bandgap Strategy Enables High Efficiency Solution‐Processed Kesterite Solar Cells

Contact Info

Product

Resources

About

The fox and the hound: in-depth and in-grain Na doping and Ga grading in Cu(In,Ga)Se₂ solar cells

The fox and the hound: in-depth and in-grain Na doping and Ga grading in Cu(In,Ga)Se₂ solar cells

Effect of Combined Alkali (KF + CsF) Post‐Deposition Treatment on Cu(InGa)Se₂ Solar Cells