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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/15367
Title: Wide color gamut deep-blue OLED architecture for display application
Authors: Dubey D.K.
Konidena R.K.
Sahoo S.
Kumar Yadav R.A.
Swayamprabha S.S.
Justin Thomas, K. R.
Jou J.-H.
Anderson T.J.
Zavada J.
Kilgore S.
Hite J.
Chakrapani V.
Published in: Proceedings of ECS Transactions
Abstract: Organic light emitting diodes (OLEDs) are considered to be among the best flat panel display technologies owing to their wide viewing angle, wide color gamut, high speed response, high resolution, and simple structure. In order to enhance the realism, wide color gamut is of vital importance to all the display devices. Here, we demonstrate a wide color gamut, deep-blue OLED for the next generation high quality full-panel displays based on the lateral introduction of the cyano group on a local excited (LE) chromophoric axis, which significantly affects the nature of the excited state and leads to the optimal hybridization local and charge transfer states (HCLT). Most notably, OLED based on the HLCT molecule (C4) showed more than two-fold increment in the external quantum efficiency (EQE) and uncompromised color purity as compared to a molecule (CI), which lacks cyano group and possesses LE state. The engineered molecular design features cross-conjugated localized and charge-transfer chromophores which result in a hybridized local charge transfer (HLCT) excited state. OLED using this material presented greater than 6.5% external quantum efficiency with excellent color saturation (CIEy -0.058) and small full-width at half maximum (46nm). Additionally, the resultant deep blue emission achieved 99, 101, 101, 100, and 96 % color saturation compared with the sRGB, NTSC, Adobe RGB, HDTV ITU-R BT.709-5, and Rec. 2020 standards, respectively.
Citation: Proceedings of ECS Transactions, (2018), 33- 39
URI: http://repository.iitr.ac.in/handle/123456789/15367
Issue Date: 2018
Publisher: Electrochemical Society Inc.
ISBN: 9.78E+12
ISSN: 19386737
Author Scopus IDs: 57193009616
56200880700
56982461100
57203005559
57202421070
57203389297
35083609400
Author Affiliations: Dubey, D.K., Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan
Konidena, R.K., Organic Materials Laboratory, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Sahoo, S., Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan
Kumar Yadav, R.A., Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan
Swayamprabha, S.S., Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan
Thomas, K.R.J., Organic Materials Laboratory, Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Jou, J.-H., Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan
Appears in Collections:Conference Publications [CY]

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