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Full-Color Manipulation of Polydimethylsiloxane by Spontaneous Fluorescent-Dye-Diffusion

Title
Full-Color Manipulation of Polydimethylsiloxane by Spontaneous Fluorescent-Dye-Diffusion
Authors
Song, SeongkyuJeong, Soon Moon
DGIST Authors
Song, Seongkyu; Jeong, Soon Moon
Issue Date
2019-10-16
Citation
Collaborative Conference on Materials Science and Technology (CCMST) 2019
Type
Conference
Abstract
Color manipulation concept using mixing of two or more light sources has been widely applied in light-emitting devices such as organic/inorganic light-emitting diodes and dye lasers [1]. In particular, three primary colors (usually red, green and blue) are used so that the observer can experience a wide range of colors [2]. The application of this basic concept into polydimethylsiloxane (PDMS) is attractive because PDMS has its inherent characteristics of ease of fabrication, mechanical robustness and low cost. Possibly the fluorescent-dye incorporated PDMS can be applied in flexible/stretchable light sources, detectors, filters and wavelength-converters. Previously we reported spontaneous fluorescent 4-(dicyanomethylene)-2-t-butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB, red dye) diffusion in PDMS for the efficient wavelength converter of mechanoluminescence [3]. Here, we demonstrate the full-color manipulation of PDMS by spontaneous diffusion of red, green, blue fluorescent organic dyes without using solvent process. The intensities of each colors were manipulated by controlling the concentration of three dyes in PDMS. Based on this approach, we also show white light emitting PDMS [4]. Figure 1 shows photographs and normalized PL spectra obtained from PDMS(R), PDMS(G), PDMS(B) and PDMS (W), respectively. Three PDMS samples diffused with red, green, blue organic fluorescent dyes clearly show the RGB light with CIE coordinates of (0.54, 0.46), (0.20, 0.37) (0.16, 0.055) under UV (365nm) irradiation. Because RGB is primary colors to make all visible wavelength light by mixing of colors, it is possible to make all visible light emitting PDMS films by controlling the concentration of three organic dyes in PDMS. We mixed RGB dyes and demonstrate white light emitting PDMS with CIE coordinates of (0.30, 0.30). Fig. 1. Photographs and 365nm-excited PL spectra of blue, green, red and white PDMS [1] S. M. Jeong, S. Song, S. –K. Lee, N. Y. Ha, Adv. Mater., 25, 6194 (2013). [2] S. M. Jeong, S. Song, K. –I. Joo, J. Kim, S. –H. Hwang, J. Jeong, H. Kim, Energy Environ. Sci., 7, 3338 (2014). [3] S. M. Jeong, S. Song, H. Kim, K. –I. Joo, H. Takezoe, Adv. Funct. Mater., 26, 4848 (2016). [4] S. Song, H. Takezoe, S. M. Jeong, J. Mater. Chem. C, 6, 10704 (2018).
URI
http://hdl.handle.net/20.500.11750/14243
Publisher
Collaborative Conference on Materials Science and Technology
Related Researcher
Files:
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Collection:
Division of Energy Technology2. Conference Papers


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