Browse > Article
http://dx.doi.org/10.3807/KJOP.2021.32.5.220

Study of the Effect of the Transmittance of a Diffuser Plate on the Optical Characteristics of High-power Quantum-dot Illumination  

Kim, Hye-Rin (School of Nano Convergence Technology, Nano Convergence Technology Center, Hallym University)
You, Dong Geun (School of Nano Convergence Technology, Nano Convergence Technology Center, Hallym University)
You, Jae Hwan (School of Nano Convergence Technology, Nano Convergence Technology Center, Hallym University)
Jang, Jun Won (School of Nano Convergence Technology, Nano Convergence Technology Center, Hallym University)
Choi, Moo Kyu (School of Nano Convergence Technology, Nano Convergence Technology Center, Hallym University)
Hong, Seung Chan (School of Nano Convergence Technology, Nano Convergence Technology Center, Hallym University)
Ko, Jae-Hyeon (School of Nano Convergence Technology, Nano Convergence Technology Center, Hallym University)
Joe, Sung-Yoon (Light/Display Convergence R&BD Division, Cheorwon Plasma Research Institute)
Kim, Yongduk (Light/Display Convergence R&BD Division, Cheorwon Plasma Research Institute)
Park, Taehee (GLVISION Co., Ltd.)
Ko, Young Wook (GLVISION Co., Ltd.)
Publication Information
Korean Journal of Optics and Photonics / v.32, no.5, 2021 , pp. 220-229 More about this Journal
Abstract
The optical characteristics of high-power direct-lit white light-emitting diode (LED) lighting were investigated, where a quantum dot (QD) film was adopted to enhance the color-rendering index (CRI). The transmittance of the diffuser plate and the concentration of the QD film were varied in this study. The color coordinates and the correlated color temperature (CCT) did not show any appreciable change, while the CRI values increased slightly as the transmittance of the diffuser plate decreased. The investigated optical properties were nearly independent of the viewing angle, and the luminance distribution was close to Lambertian. The CCT decreased from approximately 6000 K to approximately 4000 K as the concentration of the QD film increased from 0 to 7.5 wt%, which was due to the enhanced red component in the emission spectrum. The CRI increased to approximately 95 for some optical configurations of the lighting. These results demonstrate that glare-free, color-changeable, high-rendering LED lighting can be realized by using a combination of a diffuser plate of appropriate transmittance and a red QD film.
Keywords
Color rendering index; Diffuser plate; Light-emitting diode; Quantum dot;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Y. Altintas, S. Genc, M. Y. Talpur, and E. Mutlugun, "CdSe/ZnS quantum dot films for high performance flexible lighting and display applications," Nanotechnol. 27, 295604 (2016).   DOI
2 S. J. Kim, H. W. Jang, J.-G. Lee, J.-H. Ko, Y. W. Ko, and Y. Kim, "Study on improvements in the emission properties of quantum-dot film-based backlights," New. Phys.: Sae Mulli 69, 861-866 (2019).   DOI
3 Q. Hong, K.-C. Lee, Z. Luo, and S.-T. Wu, "High-efficiency quantum dot remote phosphor film," Appl. Opt. 54, 4617-4622 (2015).   DOI
4 S. C. Hong, J. Baek, H. Lee, G. J. Lee, J.-G. Lee, J.-H. Ko, Y. W. Ko, Y. Kim, and T. Park, "Study on the improvement of the color rendering index of white LEDs by using red quantum dots," New. Phys.: Sae Mulli 70, 698-704 (2020).   DOI
5 S. C. Hong, S. T. Gwak, S. Park, G. J. Lee, J.-G. Lee, J.-H. Ko, S. Y. Joe, Y. Kim, T. Park, Y. W. Ko, "Improvement of color-rendering characteristics of white light emitting diodes by using red quantum dot films," Curr. Appl. Phys. 31, 199-207 (2021).   DOI
6 J.-Y. Lien, C-J. Chen, R.-K. Chiang, and S.-L. Wang, "High color-rendering warm-white lamps using quantum-dot color conversion films," Opt. Express 24, A1021-A1032 (2016).
7 B. Li, M. Lu, J. Feng, J. Zhang, P. M. Smowton, J. I. Sohn, I.-K. Park, H. Zhong, and B. Hou, "Colloidal quantum dot hybrids: an emerging class of materials for ambient lighting," J. Mater. Chem. C 8, 10676-10695 (2020).   DOI
8 Y.-H. Ko and J.-G. Park, "Novel quantum dot enhancement film with a super-wide color gamut for LCD displays," J. Korean Phys. Soc. 72, 45-51 (2018).   DOI
9 J. McKittrick and L. E. Shea-Rohwer, "Review: down conversion materials for solid-state lighting," J. Am. Ceram. Soc. 97, 1327-1352 (2014).   DOI
10 J.-H. Kim, D.-Y. Jo, K.-H. Lee, E.-P. Jang, C.-Y. Han, J.-H. Jo, and H. Yang, "White electroluminescent lighting device based on a single quantum dot emitter," Adv. Mater. 28, 5093-5098 (2016).   DOI
11 E. Jang, S. Jun, H. Jang, J. Lim, B. Kim, and Y. Kim, "Whitelight-emitting diodes with quantum dot color converters for display backlights," Adv. Mater. 22, 3076-3080 (2010).   DOI
12 J. S. Steckel, J. Ho, C. Hamilton, C. Breen, W. Liu, P. Allen, J. Xi, and S. Coe-Sullivan, "Quantum dots: the ultimate downconversion material for LCD displays," Dig. Tech. Pap. - SID Int. Symp. 45, 130-133 (2014).
13 P. Pust, P. J. Schmidt, and W. Schnick, "A revolution in lighting," Nat. Mater. 14, 454-458 (2015).   DOI
14 J.-H. Kim, B.-Y. Kim, E.-P. Jang, C.-Y. Han, J.-H. Jo, Y. R. Do, and H. Yang, "A near-ideal color rendering white solidstate lighting device copackaged with two color-separated Cu-X-S (X = Ga, In) quantum dot emitters," J. Mater. Chem. C 5, 6755-6761 (2017).   DOI
15 T. Meng, T. Yuan, X. Li, Y. Li, L. Fan, and S. Yang, "Ultra-broad-band, red sufficient, solid white emission from carbon quantum dot aggregation for single component warm white light emitting diodes with a 91 high color rendering index," Chem. Commun. 55, 6531-6534 (2019).   DOI
16 A. Hong, J. Kim, and J. Kwak, "Sunlike white quantum dot light-emitting diodes with high color rendition quality," Adv. Opt. Mater. 8, 2001051 (2020).   DOI
17 Z. Luo, Y. Chen, and S.-T. Wu, "Wide color gamut LCD with a quantum dot backlight," Opt. Express 21, 26269-26284 (2013).   DOI
18 S. Nizamoglu, T. Erdem, X. W. Sun, and H. V. Demir, "Warm-white light-emitting diodes integrated with colloidal quantum dots for high luminous efficacy and color rendering," Opt. Lett. 35, 3372-3374 (2010).   DOI
19 J.-G. Lee, G. J. Lee, S. C. Hong, J.-H. Ko, T. Park, and Y. W. Ko, "Shape optimization of quantum-dot caps for high color-rendering white light-emitting diodes studied by optical simulation," J. Korean Phys. Soc. 78, 822-828 (2021).   DOI
20 Y. Alltintas, S. Genc, M. Younis, and E. Mutlugun, "CdSe/ZnS quantum dot films for high performance flexible lighting and display applications," Nanotechnology 27, 295604 (2016).   DOI
21 W.-L. Wu, M.-H. Fang, W. Zhou, T. Lesniewski, S. Mahlik, M. Grinberg, M. G. Brik, H.-S. Sheu, B.-M. Cheng, J. Wang, and R.-S. Liu, "High color rendering index of Rb2GeF6:Mn4+ for light-emitting diodes," Chem. Mater. 29, 935-939 (2017).   DOI
22 H.-W. Chen, R.-D. Zhu, J. He, W. Duan, W. Hu, Y.-Q. Lu, M.-C. Li, S.-L. Lee, Y.-J. Dong, and S.-T. Wu, "Going beyond the limit of an LCD's color gamut," Light Sci. Appl. 6, e17043 (2017).   DOI
23 J.-G. Lee and J.-H. Ko, "Simulation study on the improvement of the luminance and the color uniformities of integrated quantum-dot backlights for LCD applications," J. Korean Phys. Soc. 77, 264-269 (2020).   DOI
24 G. J. Lee, J.-G. Lee, Y. Kim, T. Park, Y. W. Ko, and J.-H. Ko, "The effect of the reflective property of a reflection film on the performance of backlight units with quantum-dot films for LCD applications," J. Inf. Disp. 22, 55-61 (2021).   DOI
25 D. Luo, L. Wang, S. W. Or, H. Zhang, and R.-J. Xie, "Realizing superior white LEDs with both high R9 and luminous efficacy by using dual red phosphors," RSC Adv. 7, 25964-25968 (2017).   DOI
26 D. Y. Jeong, J. Ju, and D. H. Kim, "Optimized photoluminescence of K2SiF6:Mn4+ phosphors for LED solid-state lighting," New. Phys.: Sae Mulli 66, 311-316 (2016).   DOI
27 K. A. Denault, A. A. Mikhailovsky, S. Brinkley, S. P. DenBaars, and R. Seshadri, "Improving color rendition in solid state white lighting through the use of quantum dots," J. Mater. Chem. C 1, 1461-1466 (2013).   DOI
28 X. Dai, Z. Zhang, Y. Jin, Y. Niu, H. Cao, X. Liang, L. Chen, J. Wang, and X. Peng, "Solution-processed, high-performance light-emitting diodes based on quantum dots," Nature 515, 96-99 (2014).   DOI
29 H. C. Yoon, J. H. Oh, S. Lee, J. B. Park, and Y. R. Do, "Circadian-tunable Perovskite quantum dot-based down-converted multi-package white LED with a color fidelity index over 90," Sci. Rep. 7, 2808 (2017).   DOI
30 D.-Y. Jo and H. Yang, "Spectral broadening of Cu-In-Zn-S quantum dot color converters for high color rendering white lighting device," J. Lumin. 166, 227-232 (2015).   DOI
31 H. Zhang, Q. Su, and S. Chen, "Quantum-dot and organic hybrid tandem light-emitting diodes with multi-functionality of full-color-tunability and white-light-emission," Nat. Commun. 11, 2826 (2020).   DOI
32 C. C. Lin, A. Meijerink, and R.-S. Liu, "Critical red components for next-generation white LEDs," J. Phys. Chem. Lett. 7, 495-503 (2016).   DOI
33 M. Kim, W. B. Park, B. Bang, C. H. Kim, and K.-S. Sohn, "Radiative and non-radiative decay rate of K2SiF6:Mn4+ phosphors," J. Mater. Chem. C 3, 5484-5489 (2015).   DOI
34 S.-R. Chung, S.-S. Chen, K.-W. Wang, and C.-B. Siao, " Promotion of solid-state lighting for ZnCdSe quantum dot modified-YAG-based white light-emitting diodes," RSC Adv. 6, 51989-51996 (2016).   DOI
35 H.-W. Choi, M. H. Choi, and J.-H. Ko, "Effect of temperature on the luminous properties of white-light-emitting diodes with red and green phosphors," New Phys.: Sae Mulli 63, 1149-1154 (2013).   DOI
36 S. Rhee, K. Kim, J. Roh, and J. Kwak, "Recent progress in high-luminance quantum dot light-emitting diodes," Curr. Opt. Photon. 4, 161-173 (2020).   DOI
37 G. J. Lee, S. C. Hong, J.-G. Lee, and J.-H. Ko, "Optical simulation study on the improvement of color-rendering characteristics of white light emitting diodes by using red quantum-dot films," Korean J. Opt. Photon. 32, 163-171 (2021).   DOI
38 H.-J. Kim, M.-H. Shin, J.-Y. Lee, J.-H. Kim, and Y.-J. Kim, "Realization of 95% of the Rec. 2020 color gamut in a highly efficient LCD using a patterned quantum dot film," Opt. Ex