Layer-dependent optical and dielectric properties of centimeter-scale PdSe2 films grown by chemical vapor deposition
Abstract Palladium diselenide (PdSe2), a new type of two-dimensional noble metal dihalides (NMDCs), has received widespread attention for its excellent electrical and optoelectronic properties. Herein, high-quality continuous centimeter-scale PdSe2 films with layers in the range of 3L–15L were grown...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-01-01
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| Series: | npj 2D Materials and Applications |
| Online Access: | https://doi.org/10.1038/s41699-021-00282-5 |
| _version_ | 1819006779858616320 |
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| author | MingYang Wei Jie Lian Yu Zhang ChenLin Wang Yueming Wang Zhen Xu |
| author_facet | MingYang Wei Jie Lian Yu Zhang ChenLin Wang Yueming Wang Zhen Xu |
| author_sort | MingYang Wei |
| collection | DOAJ |
| description | Abstract Palladium diselenide (PdSe2), a new type of two-dimensional noble metal dihalides (NMDCs), has received widespread attention for its excellent electrical and optoelectronic properties. Herein, high-quality continuous centimeter-scale PdSe2 films with layers in the range of 3L–15L were grown using Chemical Vapor Deposition (CVD) method. The absorption spectra and DFT calculations revealed that the bandgap of the PdSe2 films decreased with the increasing number of layers, which is due to the enhancement of orbital hybridization. Spectroscopic ellipsometry (SE) analysis shows that PdSe2 has significant layer-dependent optical and dielectric properties. This is mainly due to the unique strong exciton effect of the thin PdSe2 film in the UV band. In particular, the effect of temperature on the optical properties of PdSe2 films was also observed, and the thermo-optical coefficients of PdSe2 films with the different number of layers were calculated. This study provides fundamental guidance for the fabrication and optimization of PdSe2-based optoelectronic devices. |
| first_indexed | 2024-12-21T00:14:07Z |
| format | Article |
| id | doaj.art-edf649102fa94d578c09ff3babbb311f |
| institution | Directory Open Access Journal |
| issn | 2397-7132 |
| language | English |
| last_indexed | 2024-12-21T00:14:07Z |
| publishDate | 2022-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj 2D Materials and Applications |
| spelling | doaj.art-edf649102fa94d578c09ff3babbb311f2022-12-21T19:22:17ZengNature Portfolionpj 2D Materials and Applications2397-71322022-01-01611810.1038/s41699-021-00282-5Layer-dependent optical and dielectric properties of centimeter-scale PdSe2 films grown by chemical vapor depositionMingYang Wei0Jie Lian1Yu Zhang2ChenLin Wang3Yueming Wang4Zhen Xu5Center for Optics Research and Engineering, and Key Laboratory of Laser & Infrared System, Ministry of Education, Shandong UniversityCenter for Optics Research and Engineering, and Key Laboratory of Laser & Infrared System, Ministry of Education, Shandong UniversityCenter for Optics Research and Engineering, and Key Laboratory of Laser & Infrared System, Ministry of Education, Shandong UniversitySchool of Information Science and Engineering, and Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong UniversityCenter for Optics Research and Engineering, and Key Laboratory of Laser & Infrared System, Ministry of Education, Shandong UniversitySchool of Information Science and Engineering, and Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong UniversityAbstract Palladium diselenide (PdSe2), a new type of two-dimensional noble metal dihalides (NMDCs), has received widespread attention for its excellent electrical and optoelectronic properties. Herein, high-quality continuous centimeter-scale PdSe2 films with layers in the range of 3L–15L were grown using Chemical Vapor Deposition (CVD) method. The absorption spectra and DFT calculations revealed that the bandgap of the PdSe2 films decreased with the increasing number of layers, which is due to the enhancement of orbital hybridization. Spectroscopic ellipsometry (SE) analysis shows that PdSe2 has significant layer-dependent optical and dielectric properties. This is mainly due to the unique strong exciton effect of the thin PdSe2 film in the UV band. In particular, the effect of temperature on the optical properties of PdSe2 films was also observed, and the thermo-optical coefficients of PdSe2 films with the different number of layers were calculated. This study provides fundamental guidance for the fabrication and optimization of PdSe2-based optoelectronic devices.https://doi.org/10.1038/s41699-021-00282-5 |
| spellingShingle | MingYang Wei Jie Lian Yu Zhang ChenLin Wang Yueming Wang Zhen Xu Layer-dependent optical and dielectric properties of centimeter-scale PdSe2 films grown by chemical vapor deposition npj 2D Materials and Applications |
| title | Layer-dependent optical and dielectric properties of centimeter-scale PdSe2 films grown by chemical vapor deposition |
| title_full | Layer-dependent optical and dielectric properties of centimeter-scale PdSe2 films grown by chemical vapor deposition |
| title_fullStr | Layer-dependent optical and dielectric properties of centimeter-scale PdSe2 films grown by chemical vapor deposition |
| title_full_unstemmed | Layer-dependent optical and dielectric properties of centimeter-scale PdSe2 films grown by chemical vapor deposition |
| title_short | Layer-dependent optical and dielectric properties of centimeter-scale PdSe2 films grown by chemical vapor deposition |
| title_sort | layer dependent optical and dielectric properties of centimeter scale pdse2 films grown by chemical vapor deposition |
| url | https://doi.org/10.1038/s41699-021-00282-5 |
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