Realization of wide circadian variability by quantum dots-luminescent mesoporous silica-based white light-emitting diodes

Xie, Bin1,2; Zhang, Jingjing1,3; Chen, Wei2; Hao, Junjie2; Cheng, Yanhua1; Hu, Run1; Wu, Dan4; Wang, Kai2; Luo, Xiaobing1

2017-10-20

10.1088/1361-6528/aa82d7

NANOTECHNOLOGY   影响因子和分区

0957-4484

1361-6528

Human comfort has become one of the most important criteria in modern lighting architecture. Here, we proposed a tuning strategy to enhance the non-image forming photobiological effect on the human circadian rhythm based on quantum-dots-converted white light-emitting diodes ( QDsWLEDs). We introduced the limiting variability of the circadian action factor ( CAF), defined as the ratio of circadian efficiency and luminous efficiency of radiation. The CAF was deeply discussed and was found to be a function of constraining the color rendering index ( CRI) and correlated color temperatures. The maximum CAF variability of QDs-WLEDs was found to be dependent on the QDs' peak wavelength and full width at half maximum. With the optimized parameters, the packaging materials were synthesized and WLEDs were packaged. Experimental results show that at CRI. >. 90, the maximum CAF variability can be tuned by 3.83 times (from 0.251 at 2700 K to 0.961 at 6500 K), which implies that our approach could reduce the number of tunable channels, and could achieve wider CAF variability.

quantum dots light-emitting diodes optical effects on vision optical design

SCI ; EI

英语

通讯

Guangdong Innovation Project[2014A010105005] ; Guangdong Innovation Project[2014TQ01C494]

Science & Technology - Other Topics ; Materials Science ; Physics

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied

WOS:000411707100001

IOP PUBLISHING LTD

20174004231475

Diodes ; Efficiency ; Image enhancement ; Light emitting diodes ; Nanocrystals ; Optical design ; Organic light emitting diodes (OLED) ; Packaging materials ; Room and pillar mining ; Silica

Mine and Quarry Operations:502.1 ; Packaging Materials:694.2 ; Semiconductor Devices and Integrated Circuits:714.2 ; Light/Optics:741.1 ; Nanotechnology:761 ; Production Engineering:913.1

MATERIALS SCIENCE

Web of Science

1.Huazhong Univ Sci & Technol, Sch Energy & Power Engn, Wuhan 430074, Hubei, Peoples R China
2.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
3.China Univ Geosci, Sch Automat, Wuhan 430074, Hubei, Peoples R China
4.Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore

Xie, Bin,Zhang, Jingjing,Chen, Wei,et al. Realization of wide circadian variability by quantum dots-luminescent mesoporous silica-based white light-emitting diodes[J]. NANOTECHNOLOGY,2017,28(42).

Xie, Bin.,Zhang, Jingjing.,Chen, Wei.,Hao, Junjie.,Cheng, Yanhua.,...&Luo, Xiaobing.(2017).Realization of wide circadian variability by quantum dots-luminescent mesoporous silica-based white light-emitting diodes.NANOTECHNOLOGY,28(42).

Xie, Bin,et al."Realization of wide circadian variability by quantum dots-luminescent mesoporous silica-based white light-emitting diodes".NANOTECHNOLOGY 28.42(2017).