Enhancement of Electron Injection in Organic Light-Emitting Diodes with Photosensitive Charge Generation Layer
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概要
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We describe the enhancement of electron injection by external light irradiation in organic light-emitting diodes (OLEDs) with a charge generation layer (CGL). Under He--Ne laser irradiation, photon-induced charge generation under electric field occurred in the CGL. Electrons and holes were generated in the CGL and the electrons were directly injected into adjacent electron transport layers. As a result, the enhancement of current density under light irradiation was observed. A thousand fold enhancement of current density was obtained for light irradiation under forward biased condition. Current density was determined by the intensity of light irradiation and was saturated under the higher voltage regions. Up-converted light emission was also observed under the light irradiation.
- 2011-01-25
著者
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Naka Shigeki
Graduate Scholl of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
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Okada Hiroyuki
Graduate Scholl of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
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Okawa Yuta
Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
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