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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 13 — Jul. 1, 2007
  • pp: 1905–1907

Influence of carrier-injection efficiency on modulation rate of organic light source

Takeshi Fukuda, Tomoko Okada, Bin Wei, Musubu Ichikawa, and Yoshio Taniguchi  »View Author Affiliations

Optics Letters, Vol. 32, Issue 13, pp. 1905-1907 (2007)

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We have investigated the relationship between the energy levels of an emissive layer and the modulation rate of organic light-emitting diodes (OLEDs) based on a distyrylbenzene derivative, 1,4-bis[2-[4-[ N , N - di(p-tolyl)amino]phenyl]vinyl]benzene (DSB). By utilizing DSB as an emitting material, a high modulation rate can be realized because of the short fluorescence lifetime of 0.2 ns of DSB. Furthermore, we also found that an energy gap between an emissive layer and an adjacent organic layer is an important parameter to improve modulation rate. DSB-doped 4,4-bis(2,2-ditolylvinyl)biphenyl is the best combination of all the organic materials used in this study, and the fastest cutoff frequency of 10 MHz has been achieved for the OLED in spite of the large emitting area of 1 mm 2 .

© 2007 Optical Society of America

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(160.4890) Materials : Organic materials
(230.3670) Optical devices : Light-emitting diodes
(230.6080) Optical devices : Sources
(250.5230) Optoelectronics : Photoluminescence

ToC Category:
Optical Devices

Original Manuscript: March 27, 2007
Revised Manuscript: April 27, 2007
Manuscript Accepted: May 4, 2007
Published: June 22, 2007

Takeshi Fukuda, Tomoko Okada, Bin Wei, Musubu Ichikawa, and Yoshio Taniguchi, "Influence of carrier-injection efficiency on modulation rate of organic light source," Opt. Lett. 32, 1905-1907 (2007)

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