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Investigate the thermodynamic stability, defect formation behavior, and optimal chemical growth conditions of Cu2ZnSnS4 absorbers for thin-film photovoltaics.

January 11, 2010Applied Physics Letters

Defect physics of the kesterite thin-film solar cell absorber Cu2ZnSnS4

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Investigate the thermodynamic stability, defect formation behavior, and optimal chemical growth conditions of Cu2ZnSnS4 absorbers for thin-film photovoltaics.
Evaluated the thermodynamic chemical potential space required to form stoichiometric quaternary Cu2ZnSnS4.
Calculated the energetic levels and formation likelihood of native point defects and self-compensating defect pairs.
Demonstrated that the stable chemical potential region for stoichiometric Cu2ZnSnS4 formation is exceedingly narrow.
Identified the dominant point defect as a deep p-type Cu_Zn antisite acceptor, along with dominant [Cu_Zn^- + Zn_Cu^+]0 defect pairs that induce polytype formation.
Concluded that synthesized films achieve optimal performance under Cu-poor and Zn-rich conditions, provided kinetic barriers prevent ZnS precipitation.

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Implication

Thermodynamic analysis reveals a narrow stability window and deep antisite defects in kesterite Cu2ZnSnS4 absorbers, indicating Cu-poor and Zn-rich growth optimizes solar cell performance.

Cite This Study

Chen et al. (2010) studied this question.

synapsesocial.com/papers/6a73069b72f18050a131e3bd https://doi.org/10.1063/1.3275796

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Implication

Thermodynamic analysis reveals a narrow stability window and deep antisite defects in kesterite Cu2ZnSnS4 absorbers, indicating Cu-poor and Zn-rich growth optimizes solar cell performance.

Defect physics of the kesterite thin-film solar cell absorber Cu2ZnSnS4

Key Points

Discussion

Implication

Cite This Study

Defect physics of the kesterite thin-film solar cell absorber Cu2ZnSnS4

Key Points

Discussion

Implication

Cite This Study

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