Phosphor-Free Three-Dimensional Hybrid White LED With High Color-Rendering Index
In this study, we demonstrate the phosphor-free hybrid white LED devices with the combination of the truncated-hexagonal-pyramid (THP) structures and quantum dots (QDs) (THPQD). In the THP structures, it is noted that the broad spectrum can be obtained from different microfacets. Moreover, the THP s...
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IEEE
2019-01-01
|
| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/8701632/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850109083247443968 |
|---|---|
| author | Jie Zhao Tongbo Wei Ji Zhang Yonghui Zhang Xuecheng Wei Jianchang Yan Junxi Wang Jinmin Li |
| author_facet | Jie Zhao Tongbo Wei Ji Zhang Yonghui Zhang Xuecheng Wei Jianchang Yan Junxi Wang Jinmin Li |
| author_sort | Jie Zhao |
| collection | DOAJ |
| description | In this study, we demonstrate the phosphor-free hybrid white LED devices with the combination of the truncated-hexagonal-pyramid (THP) structures and quantum dots (QDs) (THPQD). In the THP structures, it is noted that the broad spectrum can be obtained from different microfacets. Moreover, the THP structures make the far-field viewing angle decrease by ∼45.4° and improve the light extraction efficiency compared with the traditional LED. The simulations also show that the light extraction efficiency of the THP LED is as approximately seven times as high as that of the traditional LED. Furthermore, by controlling the selective area growth (SAG) and adding QDs, the white emission can be realized from the THPQD LED with high color-rendering index (CRI). The CRI of the THPQD LED is from 71.2 up to 87.2 with the change of driving different current and its correlated color temperature covers the scope from 4845 to 5877 K. |
| format | Article |
| id | doaj-art-754ca22640b0485f93028db83c811dc2 |
| institution | OA Journals |
| issn | 1943-0655 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-754ca22640b0485f93028db83c811dc22025-08-20T02:38:11ZengIEEEIEEE Photonics Journal1943-06552019-01-011131810.1109/JPHOT.2019.29138698701632Phosphor-Free Three-Dimensional Hybrid White LED With High Color-Rendering IndexJie Zhao0Tongbo Wei1https://orcid.org/0000-0002-1479-082XJi Zhang2Yonghui Zhang3https://orcid.org/0000-0003-1207-4851Xuecheng Wei4Jianchang Yan5Junxi Wang6Jinmin Li7Semiconductor Lighting Technology Research and Development Center, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, ChinaSemiconductor Lighting Technology Research and Development Center, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, ChinaSchool of Electronics and Information Engineering, Hebei University of Technology, Tianjin, ChinaSchool of Electronics and Information Engineering, Hebei University of Technology, Tianjin, ChinaSemiconductor Lighting Technology Research and Development Center, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, ChinaSemiconductor Lighting Technology Research and Development Center, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, ChinaSemiconductor Lighting Technology Research and Development Center, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, ChinaSemiconductor Lighting Technology Research and Development Center, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, ChinaIn this study, we demonstrate the phosphor-free hybrid white LED devices with the combination of the truncated-hexagonal-pyramid (THP) structures and quantum dots (QDs) (THPQD). In the THP structures, it is noted that the broad spectrum can be obtained from different microfacets. Moreover, the THP structures make the far-field viewing angle decrease by ∼45.4° and improve the light extraction efficiency compared with the traditional LED. The simulations also show that the light extraction efficiency of the THP LED is as approximately seven times as high as that of the traditional LED. Furthermore, by controlling the selective area growth (SAG) and adding QDs, the white emission can be realized from the THPQD LED with high color-rendering index (CRI). The CRI of the THPQD LED is from 71.2 up to 87.2 with the change of driving different current and its correlated color temperature covers the scope from 4845 to 5877 K.https://ieeexplore.ieee.org/document/8701632/Three-dimensional structuresquantum dotsphosphor-freehybrid white LEDtruncated-hexagonal-pyramid structureslight extraction efficiency |
| spellingShingle | Jie Zhao Tongbo Wei Ji Zhang Yonghui Zhang Xuecheng Wei Jianchang Yan Junxi Wang Jinmin Li Phosphor-Free Three-Dimensional Hybrid White LED With High Color-Rendering Index IEEE Photonics Journal Three-dimensional structures quantum dots phosphor-free hybrid white LED truncated-hexagonal-pyramid structures light extraction efficiency |
| title | Phosphor-Free Three-Dimensional Hybrid White LED With High Color-Rendering Index |
| title_full | Phosphor-Free Three-Dimensional Hybrid White LED With High Color-Rendering Index |
| title_fullStr | Phosphor-Free Three-Dimensional Hybrid White LED With High Color-Rendering Index |
| title_full_unstemmed | Phosphor-Free Three-Dimensional Hybrid White LED With High Color-Rendering Index |
| title_short | Phosphor-Free Three-Dimensional Hybrid White LED With High Color-Rendering Index |
| title_sort | phosphor free three dimensional hybrid white led with high color rendering index |
| topic | Three-dimensional structures quantum dots phosphor-free hybrid white LED truncated-hexagonal-pyramid structures light extraction efficiency |
| url | https://ieeexplore.ieee.org/document/8701632/ |
| work_keys_str_mv | AT jiezhao phosphorfreethreedimensionalhybridwhiteledwithhighcolorrenderingindex AT tongbowei phosphorfreethreedimensionalhybridwhiteledwithhighcolorrenderingindex AT jizhang phosphorfreethreedimensionalhybridwhiteledwithhighcolorrenderingindex AT yonghuizhang phosphorfreethreedimensionalhybridwhiteledwithhighcolorrenderingindex AT xuechengwei phosphorfreethreedimensionalhybridwhiteledwithhighcolorrenderingindex AT jianchangyan phosphorfreethreedimensionalhybridwhiteledwithhighcolorrenderingindex AT junxiwang phosphorfreethreedimensionalhybridwhiteledwithhighcolorrenderingindex AT jinminli phosphorfreethreedimensionalhybridwhiteledwithhighcolorrenderingindex |