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Journal articles on the topic 'Color purity'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 May 2022

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1

Liu, Jintong, Kun Feng, Yusi Wang, Qingyuan Li, Nan Chen, and Yikun Bu. "High-color-purity, high-brightness and angle-insensitive red structural color." Chinese Optics Letters 20, no. 2 (2022): 021601. http://dx.doi.org/10.3788/col202220.021601.

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2

Kim, Jun Yong, Hyo Jong Cho, and Yun Seon Do. "High Color Purity Plasmonic Color Filter by One-Dimensional Photonic Crystals." Nanomaterials 12, no. 10 (May 16, 2022): 1694. http://dx.doi.org/10.3390/nano12101694.

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Structural colors have been reported instead of conventional dye- or pigment-based color filters. Color selectivity can degrade as structure-based optical resonances are accompanied by several resonance modes. In this work, we suggest a simple and effective design of the plasmonic color filter (PCF) that integrated the PCF with the one-dimensional (1D) photonic crystal (PhC). The introduced PhC creates an optical band gap and suppresses undesired peaks of the PCF caused by the high-order resonance mode. Finally, the suggested structure provides a high color purity. This study can be a guideline for technology that replaces conventional color filters.

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3

Song, Maowen, Xiong Li, Mingbo Pu, Yinghui Guo, Kaipeng Liu, Honglin Yu, Xiaoliang Ma, and Xiangang Luo. "Color display and encryption with a plasmonic polarizing metamirror." Nanophotonics 7, no. 1 (January 1, 2018): 323–31. http://dx.doi.org/10.1515/nanoph-2017-0062.

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AbstractStructural colors emerge when a particular wavelength range is filtered out from a broadband light source. It is regarded as a valuable platform for color display and digital imaging due to the benefits of environmental friendliness, higher visibility, and durability. However, current devices capable of generating colors are all based on direct transmission or reflection. Material loss, thick configuration, and the lack of tunability hinder their transition to practical applications. In this paper, a novel mechanism that generates high-purity colors by photon spin restoration on ultrashallow plasmonic grating is proposed. We fabricated the sample by interference lithography and experimentally observed full color display, tunable color logo imaging, and chromatic sensing. The unique combination of high efficiency, high-purity colors, tunable chromatic display, ultrathin structure, and friendliness for fabrication makes this design an easy way to bridge the gap between theoretical investigations and daily-life applications.

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Cheng, Wei-Chung, Chih-Lei Wu, and Aldo Badano. "Quantitative Assessment of Color Tracking and Gray Tracking in Color Medical Displays." Color and Imaging Conference 2019, no. 1 (October 21, 2019): 349–54. http://dx.doi.org/10.2352/issn.2169-2629.2019.27.63.

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The goal of this study is to develop quantitative metrics for evaluating color tracking and gray tracking in a color medical display. Color tracking is the chromaticity consistency of the red, green, or blue shades. Gray tracking is the chromaticity consistency of the gray shades. Color tracking and gray tracking are the most important colorimetric responses of a color medical display because they directly indicate the color calibration quality and can therefore be used to compare color performance between displays. Two metrics, primary purity and gray purity, are defined to measure the color shift of the primary shades and gray shades of a color display, respectively. The area under the curves of primary purity and gray purity can then represent the quality of color tracking (C_AUC) and gray tracking (G_AUC), respectively. Fifteen displays including medical, professional-grade, consumer-grade, mobile, and special displays were tested to compare their C_AUC and G_AUC. The OLED displays have the greatest C_AUC values. The medical and professional-grade displays have the greatest combinations of C_AUC and G_AUC values. Most consumer-grade displays have lower C_AUC and G_AUC values, but some show better gray tracking than color tracking. The special displays exhibit particularly poor color and gray tracking. Using C_AUC and G_AUC together can quantitatively predict and compare color performance of different displays.

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5

Titford, Michael. "Histotechnologists, the Color Index and dye purity." Journal of Histotechnology 35, no. 2 (July 2012): 71–73. http://dx.doi.org/10.1179/2046023612y.0000000009.

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6

Reiss, P., G. Quemard, S. Carayon, J. Bleuse, F. Chandezon, and A. Pron. "Luminescent ZnSe nanocrystals of high color purity." Materials Chemistry and Physics 84, no. 1 (March 2004): 10–13. http://dx.doi.org/10.1016/j.matchemphys.2003.11.002.

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7

Li, Guang, Juewen Zhao, Dan Zhang, Jieji Zhu, Zhichun Shi, Silu Tao, Feng Lu, and Qingxiao Tong. "Non-doped deep blue emitters based on twisted phenanthroimidazole derivatives for organic light-emitting devices (CIE y ≈ 0.04)." New Journal of Chemistry 41, no. 12 (2017): 5191–97. http://dx.doi.org/10.1039/c7nj00155j.

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Three blue emitters via twisted donor–acceptor molecular design strategy show extremely good color purity without impairing the excellent photophysical and electrical properties. The color purity of nondoped devices can meet the blue OLED requirements of NTSC.

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8

Lee, Kyu-Tae, Daeshik Kang, Hui Park, Dong Park, and Seungyong Han. "Design of Polarization-Independent and Wide-Angle Broadband Absorbers for Highly Efficient Reflective Structural Color Filters." Materials 12, no. 7 (March 30, 2019): 1050. http://dx.doi.org/10.3390/ma12071050.

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We propose a design of angle-insensitive and polarization-independent reflective color filters with high efficiency (>80%) based on broad resonance in a Fabry–Pérot cavity where asymmetric metal-dielectric-metal planar structures are employed. Broadband absorption properties allow the resonance in the visible range to remain nearly constant over a broad range of incident angles of up to 40° for both s- and p-polarizations. Effects of the angles of incidence and polarization state of incident light on the purity of the resulting colors are examined on the CIE 1931 chromaticity diagram. In addition, higher-order resonances of the proposed color filters and their electric field distributions are investigated for improved color purity. Lastly, the spectral properties of the proposed structures with different metallic layers are studied. The simple strategy described in this work could be adopted in a variety of research areas, such as color decoration devices, microscopy, and colorimetric sensors.

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9

Zhu, Xiaomin, Cuicui Zhao, Weiwei Zhang, Bo Zhang, Mengtao Sun, Xinhua Chen, Vladimir I. Belotelov, and Yujun Song. "Structural Color Control of CoFeB-Coated Nanoporous Thin Films." Coatings 11, no. 9 (September 16, 2021): 1123. http://dx.doi.org/10.3390/coatings11091123.

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Unlike color dyes, structural colors only slightly fade during long-term usage. Here, structural colors were controllably achieved by constructing CoFeB photonic crystal layers on the surface of a nanoporous aluminum oxide (AAO) substrate by magnetron sputtering deposition. The resulting material showed a wide visible spectral response and achieved structural color control with a high resolution, high color purity, and saturation. The angle-dependent color changes of CoFeB@AAO films were further investigated by changing the incident light angle. The simulation results of the model are consistent with the experiments, which is significant in practical applications. This strategy may have great potential applications for solid structure color coatings, anti-counterfeiting and security, information storage, and electromagnetic sensors.

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10

Liao, Qi Li, Ting Ting Lang, and Fei Lv. "Analysis and Research of the High Power LED Temperature Characteristics." Advanced Materials Research 710 (June 2013): 460–63. http://dx.doi.org/10.4028/www.scientific.net/amr.710.460.

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This paper is mainly about the high power LED temperature characteristics. With the integrating sphere, we conduct an experiment to observe and analysis the relationships of temperature and color coordinates, peak wavelength, color temperature, forward voltage, peak bandwidth, color purity, electric power. Finally we get that the temperature is the main factor to affect the color performance of white LED photoelectric, with the white LED apparent temperature rise, forward voltage, the color coordinates and color purity tends to go down. On the contrary with increasing junction temperature, the half-value wavelength and color temperature are increased accordingly.

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11

Miyamichi, Atsutaka, Atsushi Ono, Keiichiro Kagawa, Keita Yasutomi, and Shoji Kawahito. "Plasmonic Color Filter Array with High Color Purity for CMOS Image Sensors." Sensors 19, no. 8 (April 12, 2019): 1750. http://dx.doi.org/10.3390/s19081750.

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We demonstrate the multiband color filtering of a standard RGB color and a complementary CMY color by a plasmonic color filter, composed of concentric corrugated metallic thin film rings. The surface plasmon resonance is excited by the periodic corrugation, and the coupled light is transmitted through the central subwavelength aperture. Color selectivity is achieved not only in the visible but also in the near-infrared (NIR) region. Therefore, simultaneous imaging with visible and NIR can be realized by the integration of plasmonic color filters with sensors. We investigate the angle of incidence dependence of the transmission color selectivity and the color purity of the fabricated plasmonic color filter array.

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12

Umam, Khaerul, and Deli Nirmala. "COLOR METAPHORIN ENGLISH AND INDONESIAN SONG LYRICS." RETORIKA: Jurnal Bahasa, Sastra, dan Pengajarannya 13, no. 1 (February 23, 2020): 66. http://dx.doi.org/10.26858/retorika.v13i1.11504.

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This study contrasts the concept of color metaphor in English and Indonesian song lyrics. In the concept of color metaphor, meaning must be interpreted based on certain similarities between primary and secondary meanings. This isdescriptive qualitative research. The method used in this research is simak method. Padan method is used to analyze the data.The results show that the concept of color metaphor in English and Indonesian song lyrics have some similarities and differences. The striking similarities are found in the black color metaphor concept which symbolizes darkness, white color symbolizes purity, yellow colorsymbolizesenlightenment, and gray colorsymbolizes sadness. However, the different concepts of color metaphor are found in blue, red, and green colors.

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13

Kim, Y. H., D. C. Shin, S. H. Kim, C. H. Ko, H. S. Yu, Y. S. Chae, and S. K. Kwon. "Novel Blue Emitting Material with High Color Purity." Advanced Materials 13, no. 22 (November 2001): 1690–93. http://dx.doi.org/10.1002/1521-4095(200111)13:22<1690::aid-adma1690>3.0.co;2-k.

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14

Solov'ev, V. A., and V. F. Belenitskii. "Analytic method of determining color tone and purity." Measurement Techniques 31, no. 5 (May 1988): 447–49. http://dx.doi.org/10.1007/bf00864469.

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15

Jeong, Byoung-Seong. "Device Modeling of Quantum Dot–Organic Light Emitting Diodes for High Green Color Purity." Applied Sciences 11, no. 6 (March 22, 2021): 2828. http://dx.doi.org/10.3390/app11062828.

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In this study, the optimal structure for obtaining high green color purity was investigated by modeling quantum dot (QD)–organic light-emitting diodes (OLED). It was found that even if the green quantum dot (G-QD) density in the G-QD layer was 30%, the full width at half maximum (FWHM) in the green wavelength band could be minimized to achieve a sharp emission spectrum, but it was difficult to completely block the blue light leakage with the G-QD layer alone. This blue light leakage problem was solved by stacking a green color filter (G-CF) layer on top of the G-QD layer. When G-CF thickness 5 μm was stacked, blue light leakage was blocked completely, and the FWHM of the emission spectrum in the green wavelength band was minimized, resulting in high green color purity. It is expected that the overall color gamut of QD-OLED can be improved by optimizing the device that shows such excellent green color purity.

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16

Tang, Wei Xi, Ying Guo, and Li Xia Ma. "Colorimetric Characteristics of Metamerism of Yellowish Green Peridot." Key Engineering Materials 591 (November 2013): 277–80. http://dx.doi.org/10.4028/www.scientific.net/kem.591.277.

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Fifty-one yellowish-green color 5mm×7mm oval faceted peridots are experimented by Color i5 to test their color parameters, and concept of metamerism is introduced into this article, to analyze the effects of color parameters on the color appearance of peridots. SPSS analysis indicates: wavelength λ has no correlation with metamerism index MI, but excitation purity Pe has significant correlation with MI (rPe×MI=0.826, 0.01), means with the increase of excitation purity, the color appearance of peridot tend to be more unsteady and change more with the illumination conversion. Simultaneously, metamerism index MI increase with increasing chromaticity C* and lightness L* (rC*×MI=0.979, rL*×MI=0.889, 0.01), means the change of color appearance increase with illumination conversion. In conclusion, when the yellowish-green of peridot is more saturate and brighter, the effect of illumination on color appearance is greater.

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17

Heo, Jin Hyuck, Jin Kyoung Park, and Sang Hyuk Im. "Full-Color Spectrum Coverage by High-Color-Purity Perovskite Nanocrystal Light-Emitting Diodes." Cell Reports Physical Science 1, no. 9 (September 2020): 100177. http://dx.doi.org/10.1016/j.xcrp.2020.100177.

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18

Kim, Dong-Eun, Min-Jae Kang, Gwang-Ryeol Park, Burm-Jong Lee, Young-Soo Kwon, and Hoon-Kyu Shin. "White OLED in Hybrid Structure for Enhancing Color Purity." Journal of Nanoscience and Nanotechnology 16, no. 6 (June 1, 2016): 6374–77. http://dx.doi.org/10.1166/jnn.2016.12131.

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19

Goggi, A. Susana, Kamal M. Adam, Higinio Sanchez, and Mark Westgate. "Improving Corn Grain Purity by Using Color-Sorting Technology." Crop Management 5, no. 1 (2006): CM—2006–0309–01—RS. http://dx.doi.org/10.1094/cm-2006-0309-01-rs.

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20

Adati, R. D., S. A. M. Lima, M. R. Davolos, and M. Jafelicci. "A new β-diketone complex with high color purity." Journal of Alloys and Compounds 418, no. 1-2 (July 2006): 222–25. http://dx.doi.org/10.1016/j.jallcom.2005.10.062.

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21

Pridmore, Ralph W. "Chromatic luminance, colorimetric purity, and optimal aperture-color stimuli." Color Research & Application 32, no. 6 (2007): 469–76. http://dx.doi.org/10.1002/col.20356.

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22

Yang, Han Lin. "Study on the Effects of the Paper Performance on Color Reproduction of Inkjet Proofing." Advanced Materials Research 380 (November 2011): 183–86. http://dx.doi.org/10.4028/www.scientific.net/amr.380.183.

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Using Canon the ip 4760 inkjet proofing to print on five kind of different paper, analyzes the effects of the paper performance on color reproduction of inkjet proofing , base on color error, gray, color efficiency, color purity and color gamut range. The research indicated that the paper which has high brightness and smoothness, obtained better coloring effects and greater color gamut range.

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23

Chen, Kunlin, Yao Wen, and Yu-Sheng Lin. "Plasmonic enhancement of metamaterial nanograting with high color purity and wide color gamut characteristics." Optics Communications 506 (March 2022): 127575. http://dx.doi.org/10.1016/j.optcom.2021.127575.

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24

Zheng, Xiaowen, Chenying Yang, Kun Zhao, Zhen Wang, Wen Mu, Huaxin Yuan, Wenjia Yuan, Yueguang Zhang, and Weidong Shen. "High-color-purity transmissive colors with high angular tolerance based on metal/dielectric stacks." Optics Communications 434 (March 2019): 70–74. http://dx.doi.org/10.1016/j.optcom.2018.10.033.

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25

Ji, Chengang, Kyu-Tae Lee, and L. Jay Guo. "High-color-purity, angle-invariant, and bidirectional structural colors based on higher-order resonances." Optics Letters 44, no. 1 (December 20, 2018): 86. http://dx.doi.org/10.1364/ol.44.000086.

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26

Kumar, Ashok. "PSYCHOLOGY OF COLOR AND COLOR THERAPY." International Journal of Research -GRANTHAALAYAH 2, no. 3SE (December 31, 2014): 1–2. http://dx.doi.org/10.29121/granthaalayah.v2.i3se.2014.3581.

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An important feature of our vision system is color vision (bsavavat tapepavad). Color is a psychological property of the person's sensory sensation (chelbavaswahpbans chtvchavatjal), which originates when the brain receives information about the external / environment. Experts have described three psychological dimensions of color (chelbavaswahpbans kapumdeepvad), this three dimension is related to illumination with three physical properties ie wavelength, intensity and purity. All three psychological dimensions are color, intensity and purity.According to psychologists, there are three important phenomena related to color vision (chimdavumvadvad), hue color adaptation (sprung chirp हमारी दृष्टि तन्त्र की एक महत्वपूर्ण विशेषता रंग दृष्टि (ब्वसववत टपेपवद) है। रंग व्यक्ति की संवेदी अनुभूति का एक मनोवैज्ञानिक गुण (च्ेलबवसवहपबंस च्तवचवतजल) होता है, जिसकी उत्पत्ति तब होती है जब मस्तिष्क को बाह्या/वातावरण के बारे में सूचना प्राप्त होती है। विशेषज्ञों ने रंग की तीन मनोवैज्ञानिक विमाएंे (च्ेलबवसवहपबंस कपउमदेपवद) बताई हंै, यह तीनों आयाम रोशनी को तीन भौतिक गुणों अर्थात् तरंग दैध्र्य, तीव्रता तथा शुद्धता से संम्बन्धित है। वे तीनों मनोवैज्ञानिक विमाएंे वर्ण, तीव्रता तथा शुद्धता हैं।मनोवैज्ञानिकों के अनुसार रंग दृष्टि से संम्बन्धित तीन महत्वपूर्ण घटनाऐ (च्ीमदवउमदवद) हैय रंग अनुकूलन (ब्वसवनत ंकंचजंजपवद), रंग मिश्रण (ब्वसवनत डपगजनतम) तथा वर्णान्धता (ब्वसवनत इसपदकदमेे)

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27

Bálizs, Beáta. "Meanings of the Color Yellow and Its Color Associates, Yellow-Black and Yellow-Green." Hungarian Cultural Studies 14 (July 16, 2021): 100–120. http://dx.doi.org/10.5195/ahea.2021.430.

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Embedded in culture historical research on color, the present study contributes to the hypothesis that a given color only obtains its cultural or symbolical meanings in association with another color. By analyzing Hungarian examples of the color yellow, I will demonstrate that a color may have associations of a different character in relation to another color: this association may rely on symbolism alone, as seen in the relationship between yellow and black in connection with the concept of impurity tied to bile, excrement and dirty soil. Connections between colors may also be based on sensory-psychological/cognitive similarities, such as those drawn between yellow and green in earlier times across Europe, an association that can be traced in some archaic elements of Hungarian culture, such as in the ideas connected to jaundice. In addition to this argument, I also propose that, out of excreta, compared to feces light yellow urine is closer to the category of white associated with purity (through the analogy of white wine) than to yellow which (also) symbolizes impurity.

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28

Cai, Wanlin, Huize Zhang, Xi Yan, Anchong Zhao, Rongxing He, Ming Li, Qingxi Meng, and Wei Shen. "What accounts for the color purity of tetradentate Pt complexes? A computational analysis." Physical Chemistry Chemical Physics 21, no. 15 (2019): 8073–80. http://dx.doi.org/10.1039/c9cp00819e.

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29

PEREVERZEVA, MARIA, and DAVIDA Y. TELLER. "Infant color vision: Influence of surround chromaticity on spontaneous looking preferences." Visual Neuroscience 21, no. 3 (May 2004): 389–95. http://dx.doi.org/10.1017/s0952523804213086.

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When infants are tested with stimuli of various chromaticities embedded in a dark or achromatic (white) surround, they show maximal preference for stimuli of maximal colorimetric purity, and minimal preference for achromatic stimuli. We investigated how this pattern of preferences changes with changes of surround chromaticity. Sixteen-week-old infants were tested in two experimental conditions. The surrounds in the first condition were red and white; and in the second condition green and white. The three test stimuli varied in colorimetric purity from white to red in the first condition, and from white to green in the second condition. A test stimulus that appeared achromatic to adults when viewed in the chromatic surround was included. Infant spontaneous looking preferences changed with changes of surround chromaticity. The changes were consistent with the conclusion that infant looking behavior is governed by a preference for the stimuli that differ maximally in purity from the surround. The implications of this pattern of results are discussed.

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30

Jin, Guangrong, Shaoshan Lian, Yajuan Pan, Zilong Wu, Dehua Hu, Yueqi Mo, LinLin Liu, Zengqi Xie, and Yuguang Ma. "Effect of side chains on color purities of mono-triphenylamine-functionalized polyspirobifluorenes for pure blue polymer light-emitting diodes." Polymer Chemistry 10, no. 4 (2019): 494–502. http://dx.doi.org/10.1039/c8py01480a.

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31

Widiastuti, Mira Landep, Aris Hairmansis, Endah Retno Palupi, and Satriyas Ilyas. "DIGITAL IMAGE ANALYSIS USING FLATBED SCANNING SYSTEM FOR PURITY TESTING OF RICE SEED AND CONFIRMATION BY GROW OUT TEST." Indonesian Journal of Agricultural Science 19, no. 2 (December 9, 2018): 49. http://dx.doi.org/10.21082/ijas.v19n2.2018.p49-56.

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<p class="abstrakinggris">The common method used for purity testing of rice seed is human visual observation. This method, however, has a high degree of subjectivity when dealing with different rice varieties which have similar morphology. Digital image analysis with flatbed scanning for purity testing of rice seed was proposed by investigating the morphology of rice seeds and confirmation by grow out test (GOT) in the field. Two extra-long seed varieties were used in this study including a red rice Aek Sibundong and an aromatic rice Sintanur. The identification on 14 parameters of morphological characteristics indicated that only six parameters were correlated, i.e. area, feret, minimum feret, aspect ratio, round, and solidity. The purity of rice seed can be effectively determined using digital image analysis of spikelet color and shape. Based on the discriminant analysis of the digital image the recognition rate of rice seed purity was higher than 99.2% for shape and 93.55% for color. The method, therefore, has a potential to be used as a complement in rice seed purity testing to increase the accuracy of human visual method and it is more sensitive than GOT.</p>

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32

Sherman, Gary D., and Gerald L. Clore. "The Color of Sin." Psychological Science 20, no. 8 (August 2009): 1019–25. http://dx.doi.org/10.1111/j.1467-9280.2009.02403.x.

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Three studies examined automatic associations between words with moral and immoral meanings and the colors black and white. The speed of color naming in a Stroop task was faster when words in black concerned immorality (e.g., greed), rather than morality, and when words in white concerned morality (e.g., honesty), rather than immorality. In addition, priming immorality by having participants hand-copy an unethical statement speeded identification of words in the black font. Making immorality salient in this way also increased the moral Stroop effect among participants who had not previously shown it. In the final study, participants also rated consumer products. Moral meanings interfered with color naming most strongly among those participants who rated personal cleaning products as especially desirable. The moderation of the moral Stroop effect by individual differences in concerns about personal cleanliness suggests that ideas about purity and pollution are central to seeing morality in black and white.

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33

Xia, Zhi Liang. "The Research of Coding and Anti-Interference Strategy Basing on Color Identification of Educating Electrical Informational Production." Advanced Materials Research 482-484 (February 2012): 1021–24. http://dx.doi.org/10.4028/www.scientific.net/amr.482-484.1021.

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This paper had a research on educating electrical informational production’s color convey information having problems in realistic apply. By means of distinguish educating electrical informational production’s color information’s ligthtness, purity and hue, putted up humanility engineering imago measure’s test evaluation on efficiency during user identify color contrasting, got the contrast mix color rule that color based mainly on lightness contrast. which provided design strategy for how to control developing educating electrical informational production’s color informational channel disturb.

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34

Liu, Qiang, Chong Teng, and Zhen Liu. "Comparative Study of Metrics for Spectral Color Grouping." Advanced Materials Research 174 (December 2010): 85–88. http://dx.doi.org/10.4028/www.scientific.net/amr.174.85.

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A new combined metric for color grouping was proposed after comparing to the grouping performance of several color metrics, including dominant wavelength, color purity and some metrics in color appearance model. The performance of this method was compared to four existing methods and the experiment result proved that our proposed method not only gained excellent colorimetric and spectral accuracy but also saved the calculating time obviously.

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35

Li, Jiangong, Huifang Yan, and Fengmei Yan. "A novel high color purity blue-emitting phosphor: CaBi2B2O7:Tm3+." Materials Science and Engineering: B 209 (July 2016): 56–59. http://dx.doi.org/10.1016/j.mseb.2016.03.004.

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36

Wei, Zhenggui, Lingdong Sun, Chunsheng Liao, Chunhua Yan, and Shihua Huang. "Fluorescence intensity and color purity improvement in nanosized YBO3:Eu." Applied Physics Letters 80, no. 8 (February 25, 2002): 1447–49. http://dx.doi.org/10.1063/1.1452787.

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37

Zheng, Jianghui, Jia Feng, Qijin Cheng, Ziquan Guo, Lihan Cai, and Chao Chen. "A novel high color purity yellow luminescent material NaBaBO3:Sm3+." Functional Materials Letters 08, no. 04 (August 2015): 1550042. http://dx.doi.org/10.1142/s1793604715500423.

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Yellow emitting Sm 3+-doped NaBa 1-x BO 3(0.01 ≤ x ≤ 0.13) phosphors were synthesized by conventional solid state reaction method. The phase structure and luminescence properties of the as-prepared phosphors were investigated. These phosphors can be effectively excited by 403 nm near-ultraviolet light and feature a satisfactory yellow performance. The emission peaks are observed at 560 nm, 603 nm and 650 nm, originating from the transitions of 4G5∕2→6H5∕2, 4G5∕2→6H7∕2 and 4G5∕2→6H9∕2 respectively. Investigation of Sm 3+ concentration-dependent emission spectra indicates that the NaBa 0.95 BO 3:0.05 Sm 3+ phosphor shows the strongest yellow emission intensity and exhibits the CIE value of x = 0.4760 and y = 0.5090. Through the theoretical calculation, a high color purity of 96.0% was determined for the NaBaBO 3: Sm 3+ phosphor, and the color purity of NaBaBO 3: Sm 3+ is much higher than that of the commercial yellow phosphor YAG : Ce 3+. This work is highly relevant to the development of a new type of potential down-conversion (DC) yellow phosphor for near ultraviolet white or yellow light-emitting diodes (LEDs).

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Otto, Tobias, Marcus Müller, Paul Mundra, Vladimir Lesnyak, Hilmi Volkan Demir, Nikolai Gaponik, and Alexander Eychmüller. "Colloidal Nanocrystals Embedded in Macrocrystals: Robustness, Photostability, and Color Purity." Nano Letters 12, no. 10 (September 20, 2012): 5348–54. http://dx.doi.org/10.1021/nl3027444.

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Kumar, K. Ganesh, P. Balaji Bhargav, K. Aravinth, Raja Arumugam, P. Ramasamy, and Prathap Pathi. "Reddish-orange-emitting Ca12Al14O33: Sm3+ phosphors with high color purity." Chemical Papers 76, no. 2 (October 19, 2021): 1147–55. http://dx.doi.org/10.1007/s11696-021-01915-1.

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40

Liu, Jing-Feng, Sheng-Nan Zou, Xing Chen, Sheng-Yi Yang, You-Jun Yu, Man-Keung Fung, Zuo-Quan Jiang, and Liang-Sheng Liao. "Isomeric thermally activated delayed fluorescence emitters based on a quinolino[3,2,1-de]acridine-5,9-dione multiple resonance core and carbazole substituent." Materials Chemistry Frontiers 6, no. 7 (2022): 966–72. http://dx.doi.org/10.1039/d1qm01588e.

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41

Lee, Kyu-Tae, Sung Yong Han, and Hui Joon Park. "Omnidirectional Flexible Transmissive Structural Colors with High-Color-Purity and High-Efficiency Exploiting Multicavity Resonances." Advanced Optical Materials 5, no. 14 (June 1, 2017): 1700284. http://dx.doi.org/10.1002/adom.201700284.

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42

Jacucci, Gianni, Silvia Vignolini, and Lukas Schertel. "The limitations of extending nature’s color palette in correlated, disordered systems." Proceedings of the National Academy of Sciences 117, no. 38 (September 8, 2020): 23345–49. http://dx.doi.org/10.1073/pnas.2010486117.

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Living organisms have developed a wide range of appearances from iridescent to matte textures. Interestingly, angular-independent structural colors, where isotropy in the scattering structure is present, only produce coloration in the blue wavelength region of the visible spectrum. One might, therefore, wonder if such observation is a limitation of the architecture of the palette of materials available in nature. Here, by exploiting numerical modeling, we discuss the origin of isotropic structural colors without restriction to a specific light scattering regime. We show that high color purity and color saturation cannot be reached in isotropic short-range order structures for red hues. This conclusion holds even in the case of advanced scatterer morphologies, such as core-shell particles or inverse photonic glasses—explaining recent experimental findings reporting very poor performances of visual appearance for such systems.

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43

Liu, Lin, Hongyan Li, Peiyang Su, Zhao Zhang, Guorui Fu, Baoning Li, and Xingqiang Lü. "Red to white polymer light-emitting diode (PLED) based on Eu3+–Zn2+–Gd3+-containing metallopolymer." Journal of Materials Chemistry C 5, no. 19 (2017): 4780–87. http://dx.doi.org/10.1039/c7tc01054k.

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With color-tunable Eu³⁺–Zn²⁺–Gd³⁺-containing metallopolymer Poly(2-co-MMA-co-8) as the emitting layer, bright color-purity red-light PLED to first-example Ln³⁺-containing-metallopolymer-based WPLED were realized.

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Cui, Rongzhen, Weiqiang Liu, Liang Zhou, Xuesen Zhao, Yunlong Jiang, Youxuan Zheng, and Hongjie Zhang. "High performance red phosphorescent organic electroluminescent devices with characteristic mechanisms by utilizing terbium or gadolinium complexes as sensitizers." Journal of Materials Chemistry C 5, no. 8 (2017): 2066–73. http://dx.doi.org/10.1039/c6tc05542g.

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Watanabe, Taichi, Yoshiki Iso, Tetsuhiko Isobe, and Hirokazu Sasaki. "Photoluminescence color stability of green-emitting InP/ZnS core/shell quantum dots embedded in silica prepared via hydrophobic routes." RSC Advances 8, no. 45 (2018): 25526–33. http://dx.doi.org/10.1039/c8ra04830d.

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Zhang, Zongjie, Wei Li, Nan Ma, and Xiaoyong Huang. "High-brightness red-emitting double-perovskite phosphor Sr2LaTaO6:Eu3+ with high color purity and thermal stability [Invited]." Chinese Optics Letters 19, no. 3 (2021): 030003. http://dx.doi.org/10.3788/col202119.030003.

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Cañas-Martínez, Diana Marcela, Gilles Henri Gauthier, and Julio Andrés Pedraza-Avella. "Photo-oxidative and photo-reductive capabilities of ilmenite-rich black sand concentrates using methyl orange as a probe molecule." Photochemical & Photobiological Sciences 18, no. 4 (2019): 912–19. http://dx.doi.org/10.1039/c8pp00315g.

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Du, Xiafang, Guan Wu, Jian Cheng, Hui Dang, Kangzhe Ma, Ya-Wen Zhang, Peng-Feng Tan, and Su Chen. "High-quality CsPbBr3 perovskite nanocrystals for quantum dot light-emitting diodes." RSC Advances 7, no. 17 (2017): 10391–96. http://dx.doi.org/10.1039/c6ra27665b.

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Sharma, Shivani, and Vandana Bharti. "A COLOR THAT COMMUNICATES WITHOUT A WORD – “WHITE”." International Journal of Research -GRANTHAALAYAH 2, no. 3SE (December 31, 2014): 1–2. http://dx.doi.org/10.29121/granthaalayah.v2.i3se.2014.3550.

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The meaning of color white is purity, innocence, wholeness and completeness. It is the color produced by the combination of all the colors of visible spectrum.The color white belongs to ancient history. During the Paleolithic age, the artists used calcite and in chalk in their paintings. Egyptians connected it with their goddess Isis,who only dressed in white linen and hence used to wrap mummies.White was often associated with mother’s milk, in Greek mythology .White is the color of the human eye sees when it senses light which contains all the wave lengths of the visible spectrum. Mostly white animals have their color as a form of camouflage in winter such as dove,ivory gull,swans,arctic fox, white pearls produced by mollusk and when talking of its horrifying side it symbolizes ghosts and phantoms in many cultures/civilization. In India, white is worn on various rituals and often associated with sadness especially when somebody dies. Unlike other things, white also plays an important role in our diet.White is associated with the top of the color spectrumand, inAsian medicine, with strengthening to the lungs and large intestines .White fruits and vegetables contain nutrients such as beta-glucans, EGCG, SDG, and lignans that provide powerful immune boosting activity. These nutrients also activate natural killer B and T cells, reduce the risk of colon, breast, and prostate cancers, and balance hormone levels, reducing the risk of hormone-related cancers.White foods are often rich in sulfur and Quercetin. May reduce the risk of cancer and help the body get rid of cancer causing chemicals.e.g. buckwheat, cauliflower ,coconut, garlic, green onion, millet,mushrooms, sunflower seeds, tofu, white beans, corn, white eggplant, white radishes.

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Cheng, Chih-Chia, Yu-Lin Chu, Chih-Wei Chu, and Duu-Jong Lee. "Highly efficient organic–inorganic electroluminescence materials for solution-processed blue organic light-emitting diodes." Journal of Materials Chemistry C 4, no. 27 (2016): 6461–65. http://dx.doi.org/10.1039/c6tc01989g.

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