Improving the light extraction efficiency of polymeric light emitting diodes using two-dimensional photonic crystals

A.M. Adawi; R. Kullock; J.L. Turner; C. Vasilev; D.G. Lidzey; A. Tahraoui; P.W. Fry; D. Gibson; E. Smith; C. Foden; M. Roberts; F. Qureshi; N. Athanassopoulou

doi:10.1016/j.orgel.2006.02.002

Improving the light extraction efficiency of polymeric light emitting diodes using two-dimensional photonic crystals

A.M. Adawi^*, R. Kullock, J.L. Turner, C. Vasilev, D.G. Lidzey^*, A. Tahraoui, P.W. Fry, D. Gibson, E. Smith, C. Foden, M. Roberts, F. Qureshi, N. Athanassopoulou

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

50 Citations (Scopus)

Abstract

We have fabricated light emitting diodes based on a conjugated polymer, in which a planarized two-dimensional photonic crystal (PC) was inserted between the glass substrate and the ITO anode. Planarized PCs were fabricated into a high-index layer via interference lithography, followed by dry-etching and the spin-casting of a low-index glass. We characterize the electroluminescence (EL) emission from devices containing a PC, and compare this with photoluminescence (PL) generated from within the same structure. We show that LEDs incorporating the PC have an increased EL external quantum efficiency of (2.3 ± 1.0) times compared to a standard non-patterned control. This efficiency increase is in excellent agreement with PL measurements on similar structures, which also demonstrate relative increases in external emission intensity of 2.3 times.

Original language	English
Pages (from-to)	222-228
Number of pages	7
Journal	Organic Electronics: Materials, Physics, Chemistry and Applications
Volume	7
Issue number	4
DOIs	https://doi.org/10.1016/j.orgel.2006.02.002
Publication status	Published - 22 Mar 2006
Externally published	Yes

Keywords

polymeric light emitting diodes
photonic crystal

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10.1016/j.orgel.2006.02.002

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Adawi, A. M., Kullock, R., Turner, J. L., Vasilev, C., Lidzey, D. G., Tahraoui, A., Fry, P. W., Gibson, D., Smith, E., Foden, C., Roberts, M., Qureshi, F., & Athanassopoulou, N. (2006). Improving the light extraction efficiency of polymeric light emitting diodes using two-dimensional photonic crystals. Organic Electronics: Materials, Physics, Chemistry and Applications, 7(4), 222-228. https://doi.org/10.1016/j.orgel.2006.02.002

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title = "Improving the light extraction efficiency of polymeric light emitting diodes using two-dimensional photonic crystals",

abstract = "We have fabricated light emitting diodes based on a conjugated polymer, in which a planarized two-dimensional photonic crystal (PC) was inserted between the glass substrate and the ITO anode. Planarized PCs were fabricated into a high-index layer via interference lithography, followed by dry-etching and the spin-casting of a low-index glass. We characterize the electroluminescence (EL) emission from devices containing a PC, and compare this with photoluminescence (PL) generated from within the same structure. We show that LEDs incorporating the PC have an increased EL external quantum efficiency of (2.3 ± 1.0) times compared to a standard non-patterned control. This efficiency increase is in excellent agreement with PL measurements on similar structures, which also demonstrate relative increases in external emission intensity of 2.3 times.",

keywords = "polymeric light emitting diodes, photonic crystal",

author = "A.M. Adawi and R. Kullock and J.L. Turner and C. Vasilev and D.G. Lidzey and A. Tahraoui and P.W. Fry and D. Gibson and E. Smith and C. Foden and M. Roberts and F. Qureshi and N. Athanassopoulou",

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Adawi, AM, Kullock, R, Turner, JL, Vasilev, C, Lidzey, DG, Tahraoui, A, Fry, PW, Gibson, D, Smith, E, Foden, C, Roberts, M, Qureshi, F & Athanassopoulou, N 2006, 'Improving the light extraction efficiency of polymeric light emitting diodes using two-dimensional photonic crystals', Organic Electronics: Materials, Physics, Chemistry and Applications, vol. 7, no. 4, pp. 222-228. https://doi.org/10.1016/j.orgel.2006.02.002

TY - JOUR

T1 - Improving the light extraction efficiency of polymeric light emitting diodes using two-dimensional photonic crystals

AU - Adawi, A.M.

AU - Kullock, R.

AU - Turner, J.L.

AU - Vasilev, C.

AU - Lidzey, D.G.

AU - Tahraoui, A.

AU - Fry, P.W.

AU - Gibson, D.

AU - Smith, E.

AU - Foden, C.

AU - Roberts, M.

AU - Qureshi, F.

AU - Athanassopoulou, N.

PY - 2006/3/22

Y1 - 2006/3/22

N2 - We have fabricated light emitting diodes based on a conjugated polymer, in which a planarized two-dimensional photonic crystal (PC) was inserted between the glass substrate and the ITO anode. Planarized PCs were fabricated into a high-index layer via interference lithography, followed by dry-etching and the spin-casting of a low-index glass. We characterize the electroluminescence (EL) emission from devices containing a PC, and compare this with photoluminescence (PL) generated from within the same structure. We show that LEDs incorporating the PC have an increased EL external quantum efficiency of (2.3 ± 1.0) times compared to a standard non-patterned control. This efficiency increase is in excellent agreement with PL measurements on similar structures, which also demonstrate relative increases in external emission intensity of 2.3 times.

AB - We have fabricated light emitting diodes based on a conjugated polymer, in which a planarized two-dimensional photonic crystal (PC) was inserted between the glass substrate and the ITO anode. Planarized PCs were fabricated into a high-index layer via interference lithography, followed by dry-etching and the spin-casting of a low-index glass. We characterize the electroluminescence (EL) emission from devices containing a PC, and compare this with photoluminescence (PL) generated from within the same structure. We show that LEDs incorporating the PC have an increased EL external quantum efficiency of (2.3 ± 1.0) times compared to a standard non-patterned control. This efficiency increase is in excellent agreement with PL measurements on similar structures, which also demonstrate relative increases in external emission intensity of 2.3 times.

KW - polymeric light emitting diodes

KW - photonic crystal

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U2 - 10.1016/j.orgel.2006.02.002

DO - 10.1016/j.orgel.2006.02.002

M3 - Article

VL - 7

SP - 222

EP - 228

JO - Organic Electronics: Materials, Physics, Chemistry and Applications

JF - Organic Electronics: Materials, Physics, Chemistry and Applications

IS - 4

ER -

Improving the light extraction efficiency of polymeric light emitting diodes using two-dimensional photonic crystals

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Keywords

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