Highly efficient green-emitting ZnO:Cu2+ phosphors for NUV-pumped white-emitting diodes.
| Title: | Highly efficient green-emitting ZnO:Cu2+ phosphors for NUV-pumped white-emitting diodes. |
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| Authors: | Tran MT; Faculty of Materials Science and Engineering, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam. trung.tranmanh@phenikaa-uni.edu.vn.; Quang Trung D; Faculty of Materials Science and Engineering, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam. trung.tranmanh@phenikaa-uni.edu.vn.; Faculty of Fundamental Sciences, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam.; Tri Tuan N; College of Natural Science, Can Tho University, Ninh-Kieu District, Can Tho 94000, Vietnam.; Tuan NT; College of Natural Science, Can Tho University, Ninh-Kieu District, Can Tho 94000, Vietnam.; Tu N; Faculty of Materials Science and Engineering, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam. trung.tranmanh@phenikaa-uni.edu.vn.; Faculty of Fundamental Sciences, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam.; Van Du N; Faculty of Materials Science and Engineering, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam. trung.tranmanh@phenikaa-uni.edu.vn.; Faculty of Fundamental Sciences, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam.; Duy Hung N; International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology, 01 Dai Co Viet Street, Hanoi 10000, Vietnam.; Van Quang N; Department of Chemistry, Hanoi Pedagogical University 2, Phuc Yen, Vinh Phuc, Vietnam.; Thi Hao Tam T; School of Information Technology and Digital Economics, National Economic University, 207 Giai Phong Street, Hanoi 10000, Vietnam.; Trung Kien ND; Faculty of Electrical and Electronic Engineering, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam.; Hieu NM; Faculty of Materials Science and Engineering, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam. trung.tranmanh@phenikaa-uni.edu.vn.; Huy PT; Faculty of Materials Science and Engineering, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam. trung.tranmanh@phenikaa-uni.edu.vn. |
| Source: | Dalton transactions (Cambridge, England : 2003) [Dalton Trans] 2023 Sep 19; Vol. 52 (36), pp. 12704-12716. Date of Electronic Publication: 2023 Sep 19. |
| Publication Type: | Journal Article |
| Language: | English |
| Journal Info: | Publisher: Royal Society of Chemistry Country of Publication: England NLM ID: 101176026 Publication Model: Electronic Cited Medium: Internet ISSN: 1477-9234 (Electronic) Linking ISSN: 14779226 NLM ISO Abbreviation: Dalton Trans Subsets: MEDLINE; PubMed not MEDLINE |
| Imprint Name(s): | Original Publication: Cambridge, UK : Royal Society of Chemistry, c2003- |
| Abstract: | Phosphor-converted white light-emitting diodes (WLEDs) have received significant attention; however, the leaked light from their blue InGaN chips has an undesirable effect on human health. Hence, it is necessary to develop red, green, and blue-emitting phosphors, which can be excited by an NUV chip instead of a blue chip. Herein, green-emitting ZnO:Cu2+ phosphors have been successfully synthesized by a simple and facile thermal diffusion method. The obtained powder shows a broad emission band peaking at 525 nm and a strong absorption peak at 377 nm. The ZnO:5%Cu2+ phosphor annealed at 800 °C in 2 hours revealed a lifetime of 0.57 ms, an activation energy of 0.212 eV, and the highest emission intensity with (x, y) CIE colour coordinates (0.3130, 0.5253). A WLED prototype has been fabricated by coating the ZnO:5%Cu2+ phosphor on an NUV 375 nm LED chip, where this coated phosphor shows a high quantum efficiency (QE) of 56.6%. This is, so far, the highest reported QE value for ZnO-based phosphors. These results suggest that the ZnO:Cu2+ phosphor could be an excellent candidate for NUV-pumped phosphor-converted WLED applications. |
| Entry Date(s): | Date Created: 20230823 Latest Revision: 20230919 |
| Update Code: | 20260130 |
| DOI: | 10.1039/d3dt01663c |
| PMID: | 37609935 |
| Database: | MEDLINE |
Journal Article