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Related Concept Videos

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Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
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Related Experiment Video

Updated: Dec 23, 2025

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms
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Electro-Photoluminescence Color Change for Deformable Visual Encryption.

Gilwoon Lee1, Minsik Kong1, Doowon Park1

  • 1Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, 37673, Republic of Korea.

Advanced Materials (Deerfield Beach, Fla.)
|April 23, 2020
PubMed
Summary

This study introduces electro-photoluminescence (EPL) for radiation-responsive color change, utilizing phosphors in alternating current electroluminescence (ACEL) devices. The findings reveal that UV intensity modulates photoluminescence, enabling tunable EPL chromaticity for novel applications.

Keywords:
colorimetric sensorselectroluminescenceresponsive devicessoft roboticsstretchable displays

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Area of Science:

  • Materials Science
  • Optoelectronics
  • Solid-State Physics

Background:

  • Structural coloring and photoluminescence (PL) are known for radiation-responsive color change.
  • Electroluminescence (EL) has not been previously explored for radiation-responsive systems.
  • This research introduces a novel electro-photoluminescence (EPL) approach.

Purpose of the Study:

  • To investigate the electro-photoluminescence (EPL) color change mechanism.
  • To explore the systematic investigation of EPL chromaticity based on ACEL frequency and UV intensity.
  • To demonstrate the application of EPL in deformable visual encryption and soft robotics.

Main Methods:

  • Utilizing phosphors in alternating current electroluminescence (ACEL) devices that function as both electro- and photo-luminophores.
  • Systematically investigating EPL chromaticity by varying ACEL frequency and UV intensity.
  • Analyzing the independent control of EL and PL at low electric fields.

Main Results:

  • The PL variation influenced by UV intensity was identified as the core mechanism for EPL color change.
  • EPL chromaticity can be adjusted through a linear combination of EL and PL colors.
  • Independent control of EL and PL is achievable in low electric fields.

Conclusions:

  • The developed EPL system offers a new method for radiation-responsive color change.
  • The technology enables tunable chromaticity by combining EL and PL properties.
  • Potential applications include deformable visual encryption and soft robotic camouflage/signaling.