Perovskite Quantum Dot/Zinc Oxide Composite Films for Enhanced Luminance
We conducted experiments utilizing the scattering effect of zinc oxide (ZnO) to enhance the photoluminescence (PL) intensity of cesium lead bromide (CsPbBr<sub>3</sub>) perovskite quantum dots (QDs). This study involved investigating the method for creating a CsPbBr<sub>3</sub&g...
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2024-10-01
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| author | Nikita Khairnar Hyukmin Kwon Sunwoo Park Sangwook Park Hayoon Lee Jongwook Park |
| author_facet | Nikita Khairnar Hyukmin Kwon Sunwoo Park Sangwook Park Hayoon Lee Jongwook Park |
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| description | We conducted experiments utilizing the scattering effect of zinc oxide (ZnO) to enhance the photoluminescence (PL) intensity of cesium lead bromide (CsPbBr<sub>3</sub>) perovskite quantum dots (QDs). This study involved investigating the method for creating a CsPbBr<sub>3</sub> and ZnO mixture and determining the optimal mixing ratio. A mixture dispersion of CsPbBr<sub>3</sub> and ZnO, prepared at a 1:0.015 weight ratio through shaking, was fabricated into a film using the spin coating method. The PL intensity of this film showed a relative increase of 20% compared to the original CsPbBr<sub>3</sub> QD film without ZnO. The scattering effect of ZnO was confirmed through ultraviolet-visible (UV-Vis) absorption and transient PL experiments, and a long-delayed exciton lifetime was observed in the optimized mixture dispersion thin film. The morphology of the fabricated film was characterized using field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and atomic force microscopy (AFM). For the CsPbBr<sub>3</sub>-ZnO mixture (1:0.0015) film, crystal domains of approximately 10 nm were observed using TEM. Through AFM analysis, an excellent film roughness of 4.6 nm was observed, further confirming the potential of perovskite QD/ZnO composite films as promising materials for enhanced photoconversion intensity. In future studies, applying this method to other perovskite materials and metal oxides for the optimization of photoconversion composite materials is expected to enable the fabrication of highly efficient perovskite QD/metal oxide composite films. |
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| spelling | doaj-art-9fcd66093c384cc39b9eb89cb490da422025-08-20T02:08:09ZengMDPI AGCrystals2073-43522024-10-01141193710.3390/cryst14110937Perovskite Quantum Dot/Zinc Oxide Composite Films for Enhanced LuminanceNikita Khairnar0Hyukmin Kwon1Sunwoo Park2Sangwook Park3Hayoon Lee4Jongwook Park5Integrated Engineering, Department of Chemical Engineering, Kyung Hee University, Yongin-si 17104, Republic of KoreaIntegrated Engineering, Department of Chemical Engineering, Kyung Hee University, Yongin-si 17104, Republic of KoreaIntegrated Engineering, Department of Chemical Engineering, Kyung Hee University, Yongin-si 17104, Republic of KoreaIntegrated Engineering, Department of Chemical Engineering, Kyung Hee University, Yongin-si 17104, Republic of KoreaIntegrated Engineering, Department of Chemical Engineering, Kyung Hee University, Yongin-si 17104, Republic of KoreaIntegrated Engineering, Department of Chemical Engineering, Kyung Hee University, Yongin-si 17104, Republic of KoreaWe conducted experiments utilizing the scattering effect of zinc oxide (ZnO) to enhance the photoluminescence (PL) intensity of cesium lead bromide (CsPbBr<sub>3</sub>) perovskite quantum dots (QDs). This study involved investigating the method for creating a CsPbBr<sub>3</sub> and ZnO mixture and determining the optimal mixing ratio. A mixture dispersion of CsPbBr<sub>3</sub> and ZnO, prepared at a 1:0.015 weight ratio through shaking, was fabricated into a film using the spin coating method. The PL intensity of this film showed a relative increase of 20% compared to the original CsPbBr<sub>3</sub> QD film without ZnO. The scattering effect of ZnO was confirmed through ultraviolet-visible (UV-Vis) absorption and transient PL experiments, and a long-delayed exciton lifetime was observed in the optimized mixture dispersion thin film. The morphology of the fabricated film was characterized using field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and atomic force microscopy (AFM). For the CsPbBr<sub>3</sub>-ZnO mixture (1:0.0015) film, crystal domains of approximately 10 nm were observed using TEM. Through AFM analysis, an excellent film roughness of 4.6 nm was observed, further confirming the potential of perovskite QD/ZnO composite films as promising materials for enhanced photoconversion intensity. In future studies, applying this method to other perovskite materials and metal oxides for the optimization of photoconversion composite materials is expected to enable the fabrication of highly efficient perovskite QD/metal oxide composite films.https://www.mdpi.com/2073-4352/14/11/937perovskite quantum dotsmetal oxideZnOlight scattering |
| spellingShingle | Nikita Khairnar Hyukmin Kwon Sunwoo Park Sangwook Park Hayoon Lee Jongwook Park Perovskite Quantum Dot/Zinc Oxide Composite Films for Enhanced Luminance Crystals perovskite quantum dots metal oxide ZnO light scattering |
| title | Perovskite Quantum Dot/Zinc Oxide Composite Films for Enhanced Luminance |
| title_full | Perovskite Quantum Dot/Zinc Oxide Composite Films for Enhanced Luminance |
| title_fullStr | Perovskite Quantum Dot/Zinc Oxide Composite Films for Enhanced Luminance |
| title_full_unstemmed | Perovskite Quantum Dot/Zinc Oxide Composite Films for Enhanced Luminance |
| title_short | Perovskite Quantum Dot/Zinc Oxide Composite Films for Enhanced Luminance |
| title_sort | perovskite quantum dot zinc oxide composite films for enhanced luminance |
| topic | perovskite quantum dots metal oxide ZnO light scattering |
| url | https://www.mdpi.com/2073-4352/14/11/937 |
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