Investigation of the Influence of Structure, Stoichiometry, and Synthesis Temperature on the Optical Properties of CdTe Nanoplatelets
Colloidal cadmium telluride (CdTe) nanoplatelets (NPLs) are promising materials for optoelectronic applications, such as photovoltaics and light-emitting diodes, due to their unique optical and electronic properties. However, controlling their growth, thickness, and stoichiometry remains challenging...
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2024-11-01
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| Online Access: | https://www.mdpi.com/2079-4991/14/22/1814 |
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| author | Aigerim Ospanova Yerkebulan Koshkinbayev Asset Kainarbay Temirulan Alibay Rakhima Daurenbekova Aizhan Akhmetova Alexander Vinokurov Sergei Bubenov Sergey Dorofeev Dulat Daurenbekov |
| author_facet | Aigerim Ospanova Yerkebulan Koshkinbayev Asset Kainarbay Temirulan Alibay Rakhima Daurenbekova Aizhan Akhmetova Alexander Vinokurov Sergei Bubenov Sergey Dorofeev Dulat Daurenbekov |
| author_sort | Aigerim Ospanova |
| collection | DOAJ |
| description | Colloidal cadmium telluride (CdTe) nanoplatelets (NPLs) are promising materials for optoelectronic applications, such as photovoltaics and light-emitting diodes, due to their unique optical and electronic properties. However, controlling their growth, thickness, and stoichiometry remains challenging. This study explores the effect of synthesis temperature on the structural, optical, and stoichiometric properties of CdTe NPLs. CdTe NPLs were synthesized at temperatures of 170 °C, 180 °C, 190 °C, and 200 °C using colloidal methods. The resulting NPLs were characterized by UV–Vis absorption spectroscopy, photoluminescence (PL) spectroscopy, transmission electron microscopy (TEM), and total reflection X-ray fluorescence (TXRF) to assess their morphology, structure, and elemental composition. The results showed that the synthesis temperature significantly affected the NPL’s morphology and stoichiometry. Optimal stoichiometry was achieved at 180 °C and 190 °C, with the crystal structure transitioning from zinc blende at lower temperatures to wurtzite at higher temperatures. Optical properties, including luminescence intensity and emission peaks, also varied with temperature. The synthesis temperature is an important parameter in controlling the structural and optical properties of CdTe NPLs. The optimal conditions for obtaining NPLs with the best characteristics were identified at 190 °C, presenting important findings for further optimization of CdTe NPL synthesis for optoelectronic applications. |
| format | Article |
| id | doaj-art-1f9fef81104b4b62964a3a012217d038 |
| institution | Kabale University |
| issn | 2079-4991 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj-art-1f9fef81104b4b62964a3a012217d0382024-11-26T18:16:26ZengMDPI AGNanomaterials2079-49912024-11-011422181410.3390/nano14221814Investigation of the Influence of Structure, Stoichiometry, and Synthesis Temperature on the Optical Properties of CdTe NanoplateletsAigerim Ospanova0Yerkebulan Koshkinbayev1Asset Kainarbay2Temirulan Alibay3Rakhima Daurenbekova4Aizhan Akhmetova5Alexander Vinokurov6Sergei Bubenov7Sergey Dorofeev8Dulat Daurenbekov9Institute of Physical and Technical Sciences, L.N. Gumilyov Eurasian National University, Kazhymukan Str., 13, 010000 Astana, KazakhstanInstitute of Physical and Technical Sciences, L.N. Gumilyov Eurasian National University, Kazhymukan Str., 13, 010000 Astana, KazakhstanInstitute of Physical and Technical Sciences, L.N. Gumilyov Eurasian National University, Kazhymukan Str., 13, 010000 Astana, KazakhstanInstitute of Physical and Technical Sciences, L.N. Gumilyov Eurasian National University, Kazhymukan Str., 13, 010000 Astana, KazakhstanInstitute of Physical and Technical Sciences, L.N. Gumilyov Eurasian National University, Kazhymukan Str., 13, 010000 Astana, KazakhstanInstitute of Physical and Technical Sciences, L.N. Gumilyov Eurasian National University, Kazhymukan Str., 13, 010000 Astana, KazakhstanDepartment of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1–3, 119991 Moscow, RussiaDepartment of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1–3, 119991 Moscow, RussiaDepartment of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1–3, 119991 Moscow, RussiaInstitute of Physical and Technical Sciences, L.N. Gumilyov Eurasian National University, Kazhymukan Str., 13, 010000 Astana, KazakhstanColloidal cadmium telluride (CdTe) nanoplatelets (NPLs) are promising materials for optoelectronic applications, such as photovoltaics and light-emitting diodes, due to their unique optical and electronic properties. However, controlling their growth, thickness, and stoichiometry remains challenging. This study explores the effect of synthesis temperature on the structural, optical, and stoichiometric properties of CdTe NPLs. CdTe NPLs were synthesized at temperatures of 170 °C, 180 °C, 190 °C, and 200 °C using colloidal methods. The resulting NPLs were characterized by UV–Vis absorption spectroscopy, photoluminescence (PL) spectroscopy, transmission electron microscopy (TEM), and total reflection X-ray fluorescence (TXRF) to assess their morphology, structure, and elemental composition. The results showed that the synthesis temperature significantly affected the NPL’s morphology and stoichiometry. Optimal stoichiometry was achieved at 180 °C and 190 °C, with the crystal structure transitioning from zinc blende at lower temperatures to wurtzite at higher temperatures. Optical properties, including luminescence intensity and emission peaks, also varied with temperature. The synthesis temperature is an important parameter in controlling the structural and optical properties of CdTe NPLs. The optimal conditions for obtaining NPLs with the best characteristics were identified at 190 °C, presenting important findings for further optimization of CdTe NPL synthesis for optoelectronic applications.https://www.mdpi.com/2079-4991/14/22/1814nanoplateletsstoichiometryTXRFcolloidal synthesiselectron diffraction |
| spellingShingle | Aigerim Ospanova Yerkebulan Koshkinbayev Asset Kainarbay Temirulan Alibay Rakhima Daurenbekova Aizhan Akhmetova Alexander Vinokurov Sergei Bubenov Sergey Dorofeev Dulat Daurenbekov Investigation of the Influence of Structure, Stoichiometry, and Synthesis Temperature on the Optical Properties of CdTe Nanoplatelets Nanomaterials nanoplatelets stoichiometry TXRF colloidal synthesis electron diffraction |
| title | Investigation of the Influence of Structure, Stoichiometry, and Synthesis Temperature on the Optical Properties of CdTe Nanoplatelets |
| title_full | Investigation of the Influence of Structure, Stoichiometry, and Synthesis Temperature on the Optical Properties of CdTe Nanoplatelets |
| title_fullStr | Investigation of the Influence of Structure, Stoichiometry, and Synthesis Temperature on the Optical Properties of CdTe Nanoplatelets |
| title_full_unstemmed | Investigation of the Influence of Structure, Stoichiometry, and Synthesis Temperature on the Optical Properties of CdTe Nanoplatelets |
| title_short | Investigation of the Influence of Structure, Stoichiometry, and Synthesis Temperature on the Optical Properties of CdTe Nanoplatelets |
| title_sort | investigation of the influence of structure stoichiometry and synthesis temperature on the optical properties of cdte nanoplatelets |
| topic | nanoplatelets stoichiometry TXRF colloidal synthesis electron diffraction |
| url | https://www.mdpi.com/2079-4991/14/22/1814 |
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