| 光谱学与光谱分析 |
|
|
|
|
|
| Research on the Highly Stable White LED with CdSe/ZnS Quantum Dot as Light Conversion Layer |
| CAO Jin2, ZHOU Jie1, XIE Jing-wei1, CHEN An-ping1, ZHANG Xue1, YIN Lu-qiao2, ZHANG Jian-hua2 |
1. School of Materials Science and Engineering, Shanghai University, Shanghai, 200072, China
2. Key Laboratory of Advanced Display Technology and Integration Application of Ministry of Education, Shanghai University, Shanghai 200072, China |
|
|
|
|
Abstract In accordance with the one-step synthesis, in this paper, we synthesized 510, 550 and 630 nm three emission peaks CdSe/ZnS core-shell quantum dots with high stability and high quantum yield whose quantum yield were 82%, 98% and 97%. We used the quantum dot material to replace the phosphor material, and mixed QDs with the silicone uniformly, then dispersed the QDs/silicone composites onto the blue InGaN LEDs to fabricate the QDs-WLEDs. By successively adding different colors of quantum dots for the preparation of quantum dot light converting layer, We investigated that how does the ratio of the three kind of quantum dots whose peaks were 510, 550 and 630 nm effect on the properties of the white LED devices. This paper also studied the mechanism of energy conversion between different colors of quantum dots. We also utilized the mechanism that the quantum dots effect on the white spectrum and color coordinates; we got the results of the optimization of the white device and the ratio of three-color quantum dots. The results show that when the quantum dot ratio is 24∶7∶10, white LED devices with high stability and high efficiency can be obtained, in the current range of 20~200 mA, the range of color temperature is from 4 607 to 5 920 K, the CIE-1931 coordinates is from (0.355 1，0.348 3) to (0.323 4，0.336 1), the color rendering index is from 77.6 to 84.2, and the highest power efficiency of the devices achieves to 31.69 lm·W-1 @ 20 mA. In addition, in order to further investigate the reason of stable device performance, We studied the effects of time, temperature, UV treatment on the stability of CdSe/ZnS QDs/silicone light conversion material, the results show that the excellent stability of the devices attributes to the stability of the one-step synthesis of core-shell structure of the quantum dot material, the final optimized device is a low-power high-quality white light source and the device has good application prospects in the field of standard white light source which can truly perceive the color and original features of objects.
|
|
Received: 2014-10-27
Accepted: 2015-03-11
|
|
|
|
Corresponding Authors:
CAO Jin
E-mail: cj2007@shu.edu.cn
|
|
[1] Song W S, Lee S H, Yang H. Optical Materials Express, 2013, 3(9): 1468.
[2] Bowers M J, Mcbride J R, Rosenthal S J. Journal of the American Chemical Society, 2005, 127(44): 15378.
[3] Mashford B S, Stevenson M, Popovic Z, et al. Nature Photonics, 2013, 7(5): 407.
[4] Qian F, Li Y, Gradecak S, et al. Nature Materials, 2008, 7(9): 701.
[5] Johnson J C, Choi H J, Knutsen K P, et al. Nature Materials, 2002, 1(2): 106.
[6] Chan W C, Nie S. Science, 1998, 281(5385): 2016.
[7] Jang E, Jun S, Jang H, et al. Advanced Materials, 2010, 22(28): 3076.
[8] Chen L, Lin C C, Yeh C W, et al. Materials, 2010, 3(3): 2172.
[9] Bae W K, Char K, Hur H, et al. Chemistry of Materials, 2008, 20(2): 531.
[10] Wang X, Li W, Sun K. Journal of Materials Chemistry, 2011, 21(24): 8558.
[11] Nizamoglu S, Ozel T, Sari E, et al. Nanotechnology, 2007, 18(6): 065709.
[12] Wang H, Lee K S, Ryu J H, et al. Nanotechnology, 2008, 19(14): 145202.
[13] Chen H S, Hsu C K, Hong H Y. Photonics Technology Letters, IEEE, 2006, 18(1): 193.
[14] Nishida M. Physical Review B, 2004, 69(16): 165324. |
| [1] |
BAI Xi-lin1, 2, PENG Yue1, 2, ZHANG Xue-dong1, 2, GE Jing1, 2*. Ultrafast Dynamics of CdSe/ZnS Quantum Dots and Quantum
Dot-Acceptor Molecular Complexes[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2024, 44(01): 56-61. |
| [2] |
YI Min-na1, 2, 3, CAO Hui-min1, 2, 3*, LI Shuang-na-si1, 2, 3, ZHANG Zhu-shan-ying1, 2, 3, ZHU Chun-nan1, 2, 3. A Novel Dual Emission Carbon Point Ratio Fluorescent Probe for Rapid Detection of Lead Ions[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(12): 3788-3793. |
| [3] |
LAI Niu, HUANG Qi-qiang, ZHANG Qin-yang, ZHANG Bo-wen, WANG Juan, YANG Jie, WANG Chong, YANG Yu, WANG Rong-fei*. Introduction to Perovskite Quantum Dots and Metal-Organic Frameworks and the Development of Composites[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(11): 3321-3329. |
| [4] |
LIN Hong-jian1, ZHAI Juan1*, LAI Wan-chang1, ZENG Chen-hao1, 2, ZHAO Zi-qi1, SHI Jie1, ZHOU Jin-ge1. Determination of Mn, Co, Ni in Ternary Cathode Materials With
Homologous Correction EDXRF Analysis[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(11): 3436-3444. |
| [5] |
WANG Ke-qing1, 2*, WU Na1, 2, CHENG Xiao-xiang3, ZHANG Ran1, 2, LIU Wei1, 2*. Use of FTIR for the Quantitative Study of Corrosion Products of Iron
Cultural Relics[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(06): 1846-1853. |
| [6] |
HAN Zhao-xia1, 2, 3*, YANG Zhi-jin1, ZHANG Zhi-hong1, DING Shu-hui1, ZHANG Da-wei1, 2, 3, HONG Rui-jin1, 2, 3, TAO Chun-xian1, 2, 3, LIN Hui1, 2, 3, YU De-chao1, 2, 3. Preparation of Full-Color Carbon Quantum Dots and Their Application in WLED[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(05): 1358-1366. |
| [7] |
FENG Xiang-yu, JIANG Na, WANG Wei, LI Meng-qian, ZHAO Su-ling*, XU Zheng. One-Step Synthesis of Sulfur Quantum Dots and Electroluminescent Properties[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(05): 1569-1574. |
| [8] |
LI Shuai-wei1, WEI Qi1, QIU Xuan-bing1*, LI Chuan-liang1, LI Jie2, CHEN Ting-ting2. Research on Low-Cost Multi-Spectral Quantum Dots SARS-Cov-2 IgM and IgG Antibody Quantitative Device[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(04): 1012-1016. |
| [9] |
YANG Guo-wu1, HOU Yan-xia1, SUN Xiao-fei2, JIA Yun-hai1*, LI Xiao-jia1. Evaluation of Long-Term Stability for Non-Standard Method and
Application in Trace Element Analysis of Pure Nickel by Glow
Discharge Mass Spectrometry[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(03): 867-876. |
| [10] |
LÜ Chun-qiu1, SI Lu-lu1, PAN Zhao-jin2, LIANG Yang-lin1, LIAO Xiu-fen2, CHEN Cong-jin2*. Fast and Ratiometric Detection of Dimethoate Via the Dual- Emission Center Nitrogen-Doped Carbon Quantum Dots[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(02): 468-474. |
| [11] |
LI Zhao, WANG Ya-nan, XU Yi-pu, CAO Jing, WANG Yong-feng, WU Kun-yao, DENG Lu. Synthesis and Photoluminescence of Blue-Emitting Phosphor
YVO4∶Tm3+ for White Light Emitting Diodes[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(02): 623-628. |
| [12] |
LIU Yu-ying1, 2, WANG Xi-yuan1, 2*, MEI Ao-xue1, 2. Green Preparation of Biomass Carbon Quantum Dots for Detection of Cu2+[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(01): 248-253. |
| [13] |
ZHANG Xue-fei1, DUAN Ning1, 2*, JIANG Lin-hua1, 2*, CHENG Wen2, YU Zhao-sheng3, LI Wei-dong2, ZHU Guang-bin4, XU Yan-li2. Study on Stability and Sensitivity of Deep Ultraviolet Spectrophotometry Detection System[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(12): 3802-3810. |
| [14] |
ZHU Pan-pan1, 2, NIU Xiao-tao3, WANG Xue3, SI Xin1, 2, XIE Qing-gang3, CHEN Bo3, JIANG Shi-long3, JU Ning1*, ZHANG Shu-wen2*, LÜ Jia-ping2. The Stability of Room Temperature Liquid Cheese Based on Turbiscan Multiple Light Scattering Technique[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(11): 3415-3422. |
| [15] |
XU Yi-fei, LIU Lu, SHI Shi-kao*, WANG Yue, PAN Yu-jing, MA Xing-wei. Spectroscopic Properties of Carbon Quantum Dots Prepared From Persimmon Leaves and Fluorescent Probe to Fe3+ Ions[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(08): 2418-2422. |
|
|
|
|
