UV-sensitive photofunctional device using evanescent field absorption between SU-8 polymer optical waveguide and photochromic dye

Jang, Su-Won; Son, Seung Hyun; Kim, Do-Eok; Kwon, Dae‐Hyuk; Kim, Sung Hoon; Lee, Younghyun; Kang, Shin‐Won

doi:10.1109/lpt.2005.860394

Cited by 13 publications

(4 citation statements)

References 9 publications

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“…These chromic polymer platforms can be also adopted as colorimetric sensors against specific stimulus (i.e with UV-sensor using photochromic, chemo-sensor using chemochoromic, or even stretching sensor using mechanochromic) for an early warning system 34,35 . Important factors in these applications will be chrominance before and after exposure (must followed by this work afterwards for better application), and especially the surface areas.…”

Section: Resultsmentioning

confidence: 99%

Dye Clicked Thermoplastic Polyurethane as a Generic Platform toward Chromic-Polymer Applications

Seo

Choi

Lee

et al. 2019

Sci Rep

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Chromic dyes responding against external stimuli are useful in various field of applications especially to colorimetric sensors. However, there have been several limitations in generic application because of its cost, stability and reliability. Here, we introduced highly functionalizable polymeric materials as a supporter covalently modified with controlled amount of chromic dyes. The photochromic organic dye (spiropyran) and highly functional thermoplastic polyurethanes (TPU) have been adopted as a representative example. Conventional polymeric solution processes such as film processing, wet-spinning, electrospinning and ink-writing are readily applicable because dye-TPU maintains its own solubility in various organic solvents. Additionally, since the concentration of dye on TPU are precisely controllable, these dye-TPU solution can be adopted in broad range of specific applications, such as secret coding, smart fabric, and chromic polymeric film layer.

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Section: Resultsmentioning

confidence: 99%

Dye Clicked Thermoplastic Polyurethane as a Generic Platform toward Chromic-Polymer Applications

Seo

Choi

Lee

et al. 2019

Sci Rep

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“…Many types of photochromic dyes exist that can be used for UV detection [ 17 , 18 , 19 , 20 ]. Among organic photochromic compounds, spirooxazine (SO) dye is one of the most promising photochromic materials on account of its excellent light-fatigue resistance, photo-stability, large dipole moment change after UV irradiation, high sensitivity, and relatively fast response and recovery times [ 15 , 21 , 22 ]. The SO material is advantageous to UV-sensor applications with an electronic method [ 23 , 24 , 25 ] because its dipole moment can be remarkably changed from 1.62 D to 6.64 D after UV irradiation.…”

Section: Introductionmentioning

confidence: 99%

“…However, in conventional electronic UV sensor approaches, the photochromic dyes have been used mixed with other dielectric polymer host materials just for improving the coating process [ 22 , 33 ]. In this case, the photochromic dye orientation within an insulating film is random, which means we cannot effectively utilize the UV-induced dipole change of the photochromic molecule.…”

Section: Introductionmentioning

confidence: 99%

Tilted Orientation of Photochromic Dyes with Guest-Host Effect of Liquid Crystalline Polymer Matrix for Electrical UV Sensing

Ranjkesh

Park

et al. 2015

Sensors

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We propose a highly oriented photochromic dye film for an ultraviolet (UV)-sensing layer, where spirooxazine (SO) derivatives are aligned with the liquid crystalline UV-curable reactive mesogens (RM) using a guest-host effect. For effective electrical UV sensing with a simple metal-insulator-metal structure, our results show that the UV-induced switchable dipole moment amount of the SO derivatives is high; however, their tilting orientation should be controlled. Compared to the dielectric layer with the nearly planar SO dye orientation, the photochromic dielectric layer with the moderately tilted dye orientation shows more than seven times higher the UV-induced capacitance variation.

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“…Also, SU-8 has excellent absorption in the UV region because photolithography can be utilized. Given this, it is used in the microfabrications of the optical components such as the optical waveguide as well as the MEMS [16][17][18]. Because of these merits, we considered that the SU-8 polymer could be used as a UV protection film for OSCs.…”

Section: Introductionmentioning

confidence: 99%

Passivation films with SU-8 polymers for organic solar cell protection from ultraviolet ray

Kim

Bae

et al. 2011

Solar Energy Materials and Solar Cells

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UV-sensitive photofunctional device using evanescent field absorption between SU-8 polymer optical waveguide and photochromic dye

Cited by 13 publications

References 9 publications

Dye Clicked Thermoplastic Polyurethane as a Generic Platform toward Chromic-Polymer Applications

Dye Clicked Thermoplastic Polyurethane as a Generic Platform toward Chromic-Polymer Applications

Tilted Orientation of Photochromic Dyes with Guest-Host Effect of Liquid Crystalline Polymer Matrix for Electrical UV Sensing

Passivation films with SU-8 polymers for organic solar cell protection from ultraviolet ray

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