Quantitative assessment of selenium diffusion and passivation in CdSeTe solar cells probed by spatially resolved cathodoluminescence
The introduction of selenium in CdSeTe/CdTe solar cells has led to improved device performances attributed to the passivation of bulk defects. In this work, high-resolution cathodoluminescence experiments are performed on a series of CdSeTe/CdTe thin films with different Se concentrations to quantif...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2024-03-01
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| Series: | APL Materials |
| Online Access: | http://dx.doi.org/10.1063/5.0195398 |
| _version_ | 1797227569534205952 |
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| author | Bérengère Frouin Thomas Bidaud Stefano Pirotta Tursun Ablekim John Moseley Wyatt K. Metzger Stéphane Collin |
| author_facet | Bérengère Frouin Thomas Bidaud Stefano Pirotta Tursun Ablekim John Moseley Wyatt K. Metzger Stéphane Collin |
| author_sort | Bérengère Frouin |
| collection | DOAJ |
| description | The introduction of selenium in CdSeTe/CdTe solar cells has led to improved device performances attributed to the passivation of bulk defects. In this work, high-resolution cathodoluminescence experiments are performed on a series of CdSeTe/CdTe thin films with different Se concentrations to quantify the mechanisms and the passivation role of Se. We demonstrate a universal dependence between the Se concentration and the radiative efficiency and a ten-fold enhancement of the luminescence between CdTe and CdSe0.4Te0.6. Raw luminescence maps are converted into maps of the Se concentration, revealing its graded profile within the stack. We demonstrate the diffusion of Se along CdTe grain boundaries induced by the cadmium chloride annealing treatment and determine the diffusion coefficients, which are more than eight times higher at grain boundaries than in grain interiors. These results provide microscopic insights into the distribution of Se and its impact on the passivation of CdSeTe/CdTe solar cells. |
| first_indexed | 2024-04-24T14:42:53Z |
| format | Article |
| id | doaj.art-7f177464c197481c8fe8ffd84fe06dfd |
| institution | Directory Open Access Journal |
| issn | 2166-532X |
| language | English |
| last_indexed | 2024-04-24T14:42:53Z |
| publishDate | 2024-03-01 |
| publisher | AIP Publishing LLC |
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| spelling | doaj.art-7f177464c197481c8fe8ffd84fe06dfd2024-04-02T20:37:17ZengAIP Publishing LLCAPL Materials2166-532X2024-03-01123031135031135-710.1063/5.0195398Quantitative assessment of selenium diffusion and passivation in CdSeTe solar cells probed by spatially resolved cathodoluminescenceBérengère Frouin0Thomas Bidaud1Stefano Pirotta2Tursun Ablekim3John Moseley4Wyatt K. Metzger5Stéphane Collin6Centre de Nanosciences et de Nanotechnologies, CNRS, Université Paris-Saclay, 91120 Palaiseau, FranceCentre de Nanosciences et de Nanotechnologies, CNRS, Université Paris-Saclay, 91120 Palaiseau, FranceCentre de Nanosciences et de Nanotechnologies, CNRS, Université Paris-Saclay, 91120 Palaiseau, FranceNational Renewable Energy Laboratory, Golden, Colorado 80401, USANational Renewable Energy Laboratory, Golden, Colorado 80401, USANational Renewable Energy Laboratory, Golden, Colorado 80401, USACentre de Nanosciences et de Nanotechnologies, CNRS, Université Paris-Saclay, 91120 Palaiseau, FranceThe introduction of selenium in CdSeTe/CdTe solar cells has led to improved device performances attributed to the passivation of bulk defects. In this work, high-resolution cathodoluminescence experiments are performed on a series of CdSeTe/CdTe thin films with different Se concentrations to quantify the mechanisms and the passivation role of Se. We demonstrate a universal dependence between the Se concentration and the radiative efficiency and a ten-fold enhancement of the luminescence between CdTe and CdSe0.4Te0.6. Raw luminescence maps are converted into maps of the Se concentration, revealing its graded profile within the stack. We demonstrate the diffusion of Se along CdTe grain boundaries induced by the cadmium chloride annealing treatment and determine the diffusion coefficients, which are more than eight times higher at grain boundaries than in grain interiors. These results provide microscopic insights into the distribution of Se and its impact on the passivation of CdSeTe/CdTe solar cells.http://dx.doi.org/10.1063/5.0195398 |
| spellingShingle | Bérengère Frouin Thomas Bidaud Stefano Pirotta Tursun Ablekim John Moseley Wyatt K. Metzger Stéphane Collin Quantitative assessment of selenium diffusion and passivation in CdSeTe solar cells probed by spatially resolved cathodoluminescence APL Materials |
| title | Quantitative assessment of selenium diffusion and passivation in CdSeTe solar cells probed by spatially resolved cathodoluminescence |
| title_full | Quantitative assessment of selenium diffusion and passivation in CdSeTe solar cells probed by spatially resolved cathodoluminescence |
| title_fullStr | Quantitative assessment of selenium diffusion and passivation in CdSeTe solar cells probed by spatially resolved cathodoluminescence |
| title_full_unstemmed | Quantitative assessment of selenium diffusion and passivation in CdSeTe solar cells probed by spatially resolved cathodoluminescence |
| title_short | Quantitative assessment of selenium diffusion and passivation in CdSeTe solar cells probed by spatially resolved cathodoluminescence |
| title_sort | quantitative assessment of selenium diffusion and passivation in cdsete solar cells probed by spatially resolved cathodoluminescence |
| url | http://dx.doi.org/10.1063/5.0195398 |
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