Metastability of solar cells based on evaporated chalcopyrite absorber layers prepared with varying selenium flux

Kempa, H.; Rissom, T.; Hlawatsch, Uwe; Gaudig, Maria; Obereigner, Florian; Kaufmann, Christian A.; Scheer, Roland

doi:10.1016/j.tsf.2012.10.036

Cited by 11 publications

(7 citation statements)

References 11 publications

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“…3.3 Impact of the buffer layer Light-induced metastabilities of CIGS solar cells have been studied for many years [11][12][13]. However, complete understanding of these phenomena is still not reached.…”

Section: Impact Of P1 Scribes On Cigs Materialsmentioning

confidence: 99%

A closer look into metastable effects of Cu(In,Ga)Se₂ solar cells

Lavrenko

Walter

Plesz³

2017

Phys. Status Solidi C

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In this contribution, metastabilities of Cu(In,Ga)Se2 (CIGS)/CdS thin films are discussed based on photoluminescence (PL) imaging and complementary vibrating Kelvin probe (VKP) measurements. It has been shown that thermal treatment of CIGS/CdS thin films leads to the PL intensity quenching and a change in a surface band‐bending as deduced from VKP measurements under illumination. The impact of white light soaking has the opposite effect as compared to heat treatment: elevated temperatures enhance surface band‐bending whereas illumination leads to at least a partial band‐flattening. Furthermore, it has been found that etching away the CdS buffer layer reduces the previously measured band‐bending significantly pointing out the importance of the buffer layer deposition process. Moreover, the investigation of P1 scribes revealed that surface potentials in the vicinity of the patterning lines differ from the surface potentials measured on cells what is also reflected in the PL images as differences in the intensity between the bulk of the cells and P1 scribes. This observation suggests that the influence of P1 scribing parameters on electrical characteristics of CIGS solar cells has to be studied additionally as they can significantly affect the overall efficiency of the cell.

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Section: Impact Of P1 Scribes On Cigs Materialsmentioning

confidence: 99%

A closer look into metastable effects of Cu(In,Ga)Se₂ solar cells

Lavrenko

Walter

Plesz³

2017

Phys. Status Solidi C

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“…However, this discussion is still ongoing with a lot of arguments from both sides. For a discussion on these metastabilities, the reader should refer to the numerous literature including some excellent review articles (Igalson et al, 2011(Igalson et al, , 2013Kempa et al, 2013;K€ otschau et al, 2001;Moore et al, 2014).…”

Section: Metastabilitiesmentioning

confidence: 99%

Reliability Issues of CIGS-Based Thin Film Solar Cells

Walter

2015

Semiconductors and Semimetals

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“…The first averaging scheme can lead to errors, when solar cells show time-dependent effects as being observed, e.g. for Cu(In,Ga)Se 2 [6,7] and CdTe [8] solar cells. Such a voltage bias metastability leads to a modification of the solar cell.…”

Section: Determination Of the Collection Efficiencymentioning

confidence: 99%

Determining diode parameters of illuminated current density-voltage curves considering the voltage-dependent photo current density

Obereigner

Scheer

2014

EPJ Photovolt.

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Suitable procedures for the determination of diode parameters of illuminated and dark current density-voltage (j-V ) curves of solar cells are investigated. Within these procedures we avoid misinterpretations by the commonly used shifting approximation which assumes a voltage-independent photo carrier collection. To this end, the voltage-dependent collection efficiency is determined by j-V measurements under incremental illumination. After that, illuminated curves can be converted into dark curves taking the voltage-dependent photo current density into account. The converted dark curve next is consigned into a program that numerically solves the implicit equation of the current density and derives the diode parameters by means of a weighted least-squares minimization. Only if fluctuations of the illumination are noticeably high this procedure cannot be used, since the converted dark curve also reveals a high noise level. Then, the determination of diode parameters is performed stepwise with the help of commonly used methods.

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Metastability of solar cells based on evaporated chalcopyrite absorber layers prepared with varying selenium flux

Cited by 11 publications

References 11 publications

A closer look into metastable effects of Cu(In,Ga)Se₂ solar cells

A closer look into metastable effects of Cu(In,Ga)Se₂ solar cells

Reliability Issues of CIGS-Based Thin Film Solar Cells

Determining diode parameters of illuminated current density-voltage curves considering the voltage-dependent photo current density

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Metastability of solar cells based on evaporated chalcopyrite absorber layers prepared with varying selenium flux

Cited by 11 publications

References 11 publications

A closer look into metastable effects of Cu(In,Ga)Se2 solar cells

A closer look into metastable effects of Cu(In,Ga)Se2 solar cells

Reliability Issues of CIGS-Based Thin Film Solar Cells

Determining diode parameters of illuminated current density-voltage curves considering the voltage-dependent photo current density

Contact Info

Product

Resources

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A closer look into metastable effects of Cu(In,Ga)Se₂ solar cells

A closer look into metastable effects of Cu(In,Ga)Se₂ solar cells