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http://dx.doi.org/10.3807/KJOP.2021.32.4.163

Optical Simulation Study of the Improvement of Color-rendering Characteristics of White Light-emitting Diodes by Using Red Quantum-dot Films  

Lee, Gi Jung (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)
Lee, Jung-Gyun (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)
Publication Information
Korean Journal of Optics and Photonics / v.32, no.4, 2021 , pp. 163-171 More about this Journal
Abstract
Conventional white light-emitting diodes (LEDs) for lighting applications consist of blue LEDs and yellow phosphors, the spectrum of which lacks deep red. To improve the color-rendering characteristics of white LEDs, a red quantum-dot film was applied to the diffuser plate of LED lighting. The mean free paths of the quantum dots and the concentration of the TiO2 particles in the diffuser plate were adjusted to optimize the optical structure of the lighting. The color-rendering index (CRI) was greater than 90 for most conditions, which demonstrates that adoption of the red quantum-dot film is an effective way for improving the color-rendering properties of conventional white LEDs. The angular dispersion of color coordinates could be removed by utilizing the optical cavity formed between the diffuser plate and the reflector on the bottom of the lighting, where multiple passages of the light through the quantum-dot film reduced the differences in optical path length depending on the viewing angle.
Keywords
Color rendering index; Light emitting diode; Quantum dot;
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1 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
2 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
3 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
4 Z. Luo, Y. Chen, and S.-T. Wu, "Wide color gamut LCD with a quantum dot backlight," Opt. Express 21, 26269-26284 (2013).   DOI
5 C. Hoelen, H. Borel, J. de Graaf, M. Keuper, M. Lankhorst, C. Mutter, L. Waumans, and R. Wegh, "Remote phosphor LED modules for general illumination: toward 200 lm/W general lighting LED light sources," Proc. SPIE 7058, 70580M (2008).   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).   DOI
7 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
8 T. Meng, T. Yuan, X. Li, Y. Li, L. Fan, and S. Yang, "Ultrabroad-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
9 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
10 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
11 B. Li, M. Lu, J. Feng, J. Zhang, P. M. Smowton, J. 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
12 Y. Altintas, S. Genc, M. Y. Talpur, and E. Mutlugun, "CdSe/ZnS quantum dot films for high performance flexible lighting and display applications," Nanotechnology 27, 295604 (2016).   DOI
13 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
14 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
15 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
16 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
17 S. C. Allen and J. Steckl, "ELiXIR-Solid-state luminaire with enhanced light extraction by internal reflection," J. Disp. Technol. 3, 155-159 (2007).   DOI
18 S.-C. Park, I. Rhee, J.-Y. Kim, H. J. Bark, and J. Jeong, "Luminous efficiency of open remote phosphor-converted white-light-emitting diodes," J. Korean Phys. Soc. 60, 1191-1195 (2012).   DOI
19 M.-T. Lin, S.-P. Ying, M.-Y. Lin, K.-Y. Tai, S.-C. Tai, C.-H. Liu, J.-C. Chen, and C.-C. Sun, "Design of the ring remote phosphor structure for phosphor-converted white-light-emitting diodes," Jpn. J. Appl. Phys. 49, 072101 (2010).   DOI
20 H.-C. Kuo, C.-W. Hung, H.-C. Chen, K.-J. Chen, C.-H. Wang, C.-W. Sher, C.-C. Yeh, C.-C. Lin, C.-H. Chen, and Y.-J. Cheng, "Patterned structure of REMOTE PHOSPHOR for phosphor-converted white LEDs," Opt. Express 19, A930-A936 (2011).   DOI
21 M.-H. Kim, H. J. Lee, J.-H. Ko, D. H. Kim, H. S. Kim, and Y. D. Kim, "Improvement of electro-optic characteristics of white light-emitting diodes by using transparent ceramic-based remote phosphors," Sci. Adv. Mater. 8, 342-348 (2016).   DOI
22 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
23 Z. Liu, C.-H. Lin, B.-R. Hyun, C.-W. Sher, Z. Lv, B. Luo, F. Jiang, T. Wu, C.-H. Ho, H.-C. Kuo, and J.-H. He, "Micro-lightemitting diodes with quantum dots in display technology," Light Sci. Appl. 9, 83 (2020).   DOI
24 M.-H. Shin, H.-J. Kim, and Y.-J. Kim, "Optical modeling based on mean free path calculations for quantum dot phosphors applied to optoelectronic devices," Opt. Express 25, A113-A123 (2017).   DOI
25 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
26 P. Pust, P. J. Schmidt, and W. Schnick, "A revolution in lighting," Nat. Mater. 14, 454-458 (2015).   DOI
27 J. McKittrick and L. E. Shea-Rohwer, "Review: down conversion materials for solid-state lighting," J. Am. Ceram. Soc. 97, 1327-1352 (2014).   DOI
28 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
29 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
30 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
31 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
32 S. Nizamoglu, T. Erdem, X. W. Sun, and H. V. Demir, "Warmwhite light-emitting diodes integrated with colloidal quantum dots for high luminous efficacy and color rendering," Opt. Lett. 35, 3372-3374 (2010).   DOI
33 K. A. Denault, A. A. Mikhailovsky, S. Brinkley, S. P. Den-Baars, 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
34 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
35 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
36 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