Model Calculation of Enhanced Light Absorption Efficiency in Two-Dimensional Photonic Crystal Phosphor Films
When a phosphor film based on a photonic crystal (PhC) is excited at the photonic band-edge wavelength, the absorption of excitation light increases, which can potentially enhance the color-conversion efficiency. In this study, we modeled a two-dimensional (2D) PhC quantum dot (QD) film with a squar...
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MDPI AG
2024-12-01
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| author | Taehun Kim Sanghoon Lee Kyungtaek Min |
| author_facet | Taehun Kim Sanghoon Lee Kyungtaek Min |
| author_sort | Taehun Kim |
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| description | When a phosphor film based on a photonic crystal (PhC) is excited at the photonic band-edge wavelength, the absorption of excitation light increases, which can potentially enhance the color-conversion efficiency. In this study, we modeled a two-dimensional (2D) PhC quantum dot (QD) film with a square-lattice structure using the finite-difference time-domain method to theoretically investigate its optical properties. The embedment of a thin-film layer with a high refractive index on the surface of the QD film enables an effective localization of excitation light within the phosphor. A numerical estimation shows that the optimized 2D PhC QD film can enhance the light absorption by up to 4.2 times with a monochromatic source and by up to 1.8 times with a broadband (FWHM~30 nm) source compared to a flat-type reference QD film. |
| format | Article |
| id | doaj-art-839fc38f9f864befbc9f6666ac81e446 |
| institution | Kabale University |
| issn | 2304-6732 |
| language | English |
| publishDate | 2024-12-01 |
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| series | Photonics |
| spelling | doaj-art-839fc38f9f864befbc9f6666ac81e4462025-01-24T13:46:10ZengMDPI AGPhotonics2304-67322024-12-011211010.3390/photonics12010010Model Calculation of Enhanced Light Absorption Efficiency in Two-Dimensional Photonic Crystal Phosphor FilmsTaehun Kim0Sanghoon Lee1Kyungtaek Min2Department of IT-Semiconductor Convergence Engineering, Tech University of Korea, Siheung 15073, Republic of KoreaDepartment of IT-Semiconductor Convergence Engineering, Tech University of Korea, Siheung 15073, Republic of KoreaDepartment of IT-Semiconductor Convergence Engineering, Tech University of Korea, Siheung 15073, Republic of KoreaWhen a phosphor film based on a photonic crystal (PhC) is excited at the photonic band-edge wavelength, the absorption of excitation light increases, which can potentially enhance the color-conversion efficiency. In this study, we modeled a two-dimensional (2D) PhC quantum dot (QD) film with a square-lattice structure using the finite-difference time-domain method to theoretically investigate its optical properties. The embedment of a thin-film layer with a high refractive index on the surface of the QD film enables an effective localization of excitation light within the phosphor. A numerical estimation shows that the optimized 2D PhC QD film can enhance the light absorption by up to 4.2 times with a monochromatic source and by up to 1.8 times with a broadband (FWHM~30 nm) source compared to a flat-type reference QD film.https://www.mdpi.com/2304-6732/12/1/10photonic crystalphotonic band-edgequantum dotcolor conversionfinite-difference time-domain simulation |
| spellingShingle | Taehun Kim Sanghoon Lee Kyungtaek Min Model Calculation of Enhanced Light Absorption Efficiency in Two-Dimensional Photonic Crystal Phosphor Films Photonics photonic crystal photonic band-edge quantum dot color conversion finite-difference time-domain simulation |
| title | Model Calculation of Enhanced Light Absorption Efficiency in Two-Dimensional Photonic Crystal Phosphor Films |
| title_full | Model Calculation of Enhanced Light Absorption Efficiency in Two-Dimensional Photonic Crystal Phosphor Films |
| title_fullStr | Model Calculation of Enhanced Light Absorption Efficiency in Two-Dimensional Photonic Crystal Phosphor Films |
| title_full_unstemmed | Model Calculation of Enhanced Light Absorption Efficiency in Two-Dimensional Photonic Crystal Phosphor Films |
| title_short | Model Calculation of Enhanced Light Absorption Efficiency in Two-Dimensional Photonic Crystal Phosphor Films |
| title_sort | model calculation of enhanced light absorption efficiency in two dimensional photonic crystal phosphor films |
| topic | photonic crystal photonic band-edge quantum dot color conversion finite-difference time-domain simulation |
| url | https://www.mdpi.com/2304-6732/12/1/10 |
| work_keys_str_mv | AT taehunkim modelcalculationofenhancedlightabsorptionefficiencyintwodimensionalphotoniccrystalphosphorfilms AT sanghoonlee modelcalculationofenhancedlightabsorptionefficiencyintwodimensionalphotoniccrystalphosphorfilms AT kyungtaekmin modelcalculationofenhancedlightabsorptionefficiencyintwodimensionalphotoniccrystalphosphorfilms |