Effect of TPD:CuPc LB films as electron blocking layer on EL emission

Yulin Hua; Xiaohui Yang; Yanbing Hou; Junbiao Peng; Xiulan Feng

doi:10.1117/12.279334

1 December 1997 Effect of TPD:CuPc LB films as electron blocking layer on EL emission

Yulin Hua, Xiaohui Yang, Yanbing Hou, Junbiao Peng, Xiulan Feng

Proceedings Volume 3148, Organic Light-Emitting Materials and Devices; (1997) https://doi.org/10.1117/12.279334
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

In organic thin film electroluminescence device with ITO/PPV/TPD:CuPc/Alq:DCMl/Al structure, the TPD:CuPc Langmuir-Blodgett (LB) film as electron-blocking layer was inserted between PPV and Alq:DCMl layer. A device without TPD:CuPc layer or a device with monolayer of TPD:CuPc which was applied at higher DC voltage exhibited EL emission from both the PPV and Alq:DCMl layers. Whereas a device with monolayer of TPD:CuPc layer which was applied at lower voltage or a device with double layers of TPD:CuPc had an EL emission only from Alq:DCMl layer implying that the TPD:CuPc layer can effectively block the electrons and the Alq:DCMl electron transport layer worked as the emitting layer. Hence, we can spatially control the recombination zone and obtain different EL emission by adjusting the thickness of carrier blocking layer.

Citation Download Citation

Yulin Hua, Xiaohui Yang, Yanbing Hou, Junbiao Peng, and Xiulan Feng "Effect of TPD:CuPc LB films as electron blocking layer on EL emission", Proc. SPIE 3148, Organic Light-Emitting Materials and Devices, (1 December 1997); https://doi.org/10.1117/12.279334

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