Improving color saturation of blue light-emitting electrochemical cells by plasmonic filters

Chien Ming Fan Chiang, Bo Ren Chang, Ya-Ju Lee, Monima Sarma, Zu Po Yang, Hai Ching Su, Hsyi En Cheng, Ken Tsung Wong

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In consideration of the advantages of light-emitting electrochemical cells (LECs), it is desired to develop the saturated blue LECs for LEC display, which is hindered by the features of broad emission spectrum and emission peak not short enough. In this study, we demonstrated a novel method to improve blue saturation of the sky-blue LECs by engineering its emission spectrum through the plasmonic filters. These plasmonic filters composed of randomly distributed silver nanoparticles (Ag-NPs) can absorb the green and red emission tail of the sky-blue LECs due to localized surface plasmon resonance (LSPR). The LSPR wavelengths of Ag-NPs are tuned by manipulating the effective refractive index of materials around Ag-NPs through the accurate control of the TiO2 thickness using atomic layer deposition technique. By integrating with the plasmonic filters, the CIE1931 coordinate of the blue LECs can approach to (0.14, 0.22), which is comparable to or even better than the reported bluest values of blue LECs. Combination with the green and red LECs, the color gamut increases from 34% (without filters) to 54% of National Television System Committee (NTSC) color gamut, corresponding to 1.6 times enhancement. In addition, the blue LECs integrated with plasmonic filters still have better efficiency than those of the reported bluest LECs.

Original languageEnglish
Pages (from-to)70-75
Number of pages6
JournalOrganic Electronics
Volume51
DOIs
Publication statusPublished - 2017 Dec 1

Fingerprint

Wave filters
Electrochemical cells
electrochemical cells
Color
saturation
color
filters
Surface plasmon resonance
surface plasmon resonance
sky
emission spectra
television systems
Television systems
Atomic layer deposition
atomic layer epitaxy
Silver
Refractive index
Display devices
silver
engineering

Keywords

  • Color saturation
  • Light-emitting electrochemical cells
  • Nanoparticles

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry
  • Electrical and Electronic Engineering

Cite this

Improving color saturation of blue light-emitting electrochemical cells by plasmonic filters. / Fan Chiang, Chien Ming; Chang, Bo Ren; Lee, Ya-Ju; Sarma, Monima; Yang, Zu Po; Su, Hai Ching; Cheng, Hsyi En; Wong, Ken Tsung.

In: Organic Electronics, Vol. 51, 01.12.2017, p. 70-75.

Research output: Contribution to journalArticle

Fan Chiang, Chien Ming ; Chang, Bo Ren ; Lee, Ya-Ju ; Sarma, Monima ; Yang, Zu Po ; Su, Hai Ching ; Cheng, Hsyi En ; Wong, Ken Tsung. / Improving color saturation of blue light-emitting electrochemical cells by plasmonic filters. In: Organic Electronics. 2017 ; Vol. 51. pp. 70-75.
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