Raman Spectroscopy and Thermoelectric Characterization of Composite Thin Films of Cu<sub>2</sub>ZnSnS<sub>4</sub> Nanocrystals Embedded in a Conductive Polymer PEDOT:PSS
Cu<sub>2</sub>ZnSnS<sub>4</sub> (CZTS) is an intensively studied potential solar cell absorber and a promising thermoelectric (TE) material. In the form of colloidal nanocrystals (NCs), it is very convenient to form thin films on various substrates. Here, we investigate compo...
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| Format: | Article |
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MDPI AG
2022-12-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/1/41 |
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| author | Yevhenii Havryliuk Volodymyr Dzhagan Anatolii Karnaukhov Oleksandr Selyshchev Julia Hann Dietrich R. T. Zahn |
| author_facet | Yevhenii Havryliuk Volodymyr Dzhagan Anatolii Karnaukhov Oleksandr Selyshchev Julia Hann Dietrich R. T. Zahn |
| author_sort | Yevhenii Havryliuk |
| collection | DOAJ |
| description | Cu<sub>2</sub>ZnSnS<sub>4</sub> (CZTS) is an intensively studied potential solar cell absorber and a promising thermoelectric (TE) material. In the form of colloidal nanocrystals (NCs), it is very convenient to form thin films on various substrates. Here, we investigate composites of CZTS NCs with PEDOT:PSS, a widely used photovoltaics polymer. We focus on the investigation of the structural stability of both NCs and polymers in composite thin films with different NC-to-polymer ratios. We studied both pristine films and those subjected to flash lamp annealing (FLA) or laser irradiation with various power densities. Raman spectroscopy was used as the main characterization technique because the vibrational modes of CZTS NCs and the polymer can be acquired in one spectrum and thus allow the properties of both parts of the composite to be monitored simultaneously. We found that CZTS NCs and PEDOT:PSS mutually influence each other in the composite. The thermoelectric properties of PEDOT:PSS/CZTS composite films were found to be higher compared to the films consisting of bare materials, and they can be further improved by adding DMSO. However, the presence of NCs in the polymer deteriorates its structural stability when subjected to FLA or laser treatment. |
| first_indexed | 2024-03-09T03:29:15Z |
| format | Article |
| id | doaj.art-2a212571c842403ba03cde3bc3e617e4 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T03:29:15Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-2a212571c842403ba03cde3bc3e617e42023-12-03T14:58:16ZengMDPI AGNanomaterials2079-49912022-12-011314110.3390/nano13010041Raman Spectroscopy and Thermoelectric Characterization of Composite Thin Films of Cu<sub>2</sub>ZnSnS<sub>4</sub> Nanocrystals Embedded in a Conductive Polymer PEDOT:PSSYevhenii Havryliuk0Volodymyr Dzhagan1Anatolii Karnaukhov2Oleksandr Selyshchev3Julia Hann4Dietrich R. T. Zahn5Semiconductor Physics, Chemnitz University of Technology, 09107 Chemnitz, GermanyV.E. Lashkaryov Institute of Semiconductor Physics NAS of Ukraine, 03028 Kyiv, UkraineV.E. Lashkaryov Institute of Semiconductor Physics NAS of Ukraine, 03028 Kyiv, UkraineSemiconductor Physics, Chemnitz University of Technology, 09107 Chemnitz, GermanyCenter for Materials, Architectures, and Integration of Nanomembranes (MAIN), 09126 Chemnitz, GermanySemiconductor Physics, Chemnitz University of Technology, 09107 Chemnitz, GermanyCu<sub>2</sub>ZnSnS<sub>4</sub> (CZTS) is an intensively studied potential solar cell absorber and a promising thermoelectric (TE) material. In the form of colloidal nanocrystals (NCs), it is very convenient to form thin films on various substrates. Here, we investigate composites of CZTS NCs with PEDOT:PSS, a widely used photovoltaics polymer. We focus on the investigation of the structural stability of both NCs and polymers in composite thin films with different NC-to-polymer ratios. We studied both pristine films and those subjected to flash lamp annealing (FLA) or laser irradiation with various power densities. Raman spectroscopy was used as the main characterization technique because the vibrational modes of CZTS NCs and the polymer can be acquired in one spectrum and thus allow the properties of both parts of the composite to be monitored simultaneously. We found that CZTS NCs and PEDOT:PSS mutually influence each other in the composite. The thermoelectric properties of PEDOT:PSS/CZTS composite films were found to be higher compared to the films consisting of bare materials, and they can be further improved by adding DMSO. However, the presence of NCs in the polymer deteriorates its structural stability when subjected to FLA or laser treatment.https://www.mdpi.com/2079-4991/13/1/41Cu<sub>2</sub>ZnSnS<sub>4</sub> (CZTS)nanocrystalsPEDOT:PSSthermoelectric properties |
| spellingShingle | Yevhenii Havryliuk Volodymyr Dzhagan Anatolii Karnaukhov Oleksandr Selyshchev Julia Hann Dietrich R. T. Zahn Raman Spectroscopy and Thermoelectric Characterization of Composite Thin Films of Cu<sub>2</sub>ZnSnS<sub>4</sub> Nanocrystals Embedded in a Conductive Polymer PEDOT:PSS Nanomaterials Cu<sub>2</sub>ZnSnS<sub>4</sub> (CZTS) nanocrystals PEDOT:PSS thermoelectric properties |
| title | Raman Spectroscopy and Thermoelectric Characterization of Composite Thin Films of Cu<sub>2</sub>ZnSnS<sub>4</sub> Nanocrystals Embedded in a Conductive Polymer PEDOT:PSS |
| title_full | Raman Spectroscopy and Thermoelectric Characterization of Composite Thin Films of Cu<sub>2</sub>ZnSnS<sub>4</sub> Nanocrystals Embedded in a Conductive Polymer PEDOT:PSS |
| title_fullStr | Raman Spectroscopy and Thermoelectric Characterization of Composite Thin Films of Cu<sub>2</sub>ZnSnS<sub>4</sub> Nanocrystals Embedded in a Conductive Polymer PEDOT:PSS |
| title_full_unstemmed | Raman Spectroscopy and Thermoelectric Characterization of Composite Thin Films of Cu<sub>2</sub>ZnSnS<sub>4</sub> Nanocrystals Embedded in a Conductive Polymer PEDOT:PSS |
| title_short | Raman Spectroscopy and Thermoelectric Characterization of Composite Thin Films of Cu<sub>2</sub>ZnSnS<sub>4</sub> Nanocrystals Embedded in a Conductive Polymer PEDOT:PSS |
| title_sort | raman spectroscopy and thermoelectric characterization of composite thin films of cu sub 2 sub znsns sub 4 sub nanocrystals embedded in a conductive polymer pedot pss |
| topic | Cu<sub>2</sub>ZnSnS<sub>4</sub> (CZTS) nanocrystals PEDOT:PSS thermoelectric properties |
| url | https://www.mdpi.com/2079-4991/13/1/41 |
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