Date

Place

[P1-8]
14:00 ~ 15:30
Title:Optimization of Organic-Inorganic Hybrid Quantum Dot Light Emitting Diode Based on ZnO NPs as ETL
Yun-Soon Ka, Hye-Ryeon Jang, and Woon-Seop Choi (Hoseo Univ., Korea)
Abstract: In this study, we used an organic-inorganic hybrid structure of QD-LED and compared the performance of device based on ZnO NPs and TiO2 as commonly used metal oxide for ETL. The QDs and ZnO NPs applied to EML and ETL were synthesized using solution syntheses in person. A device structure is composed with ITO / PEDOT:PSS / CdSe/CdS/ZnS QDs / ZnO NPs / Al as anode / HIL / EML / ETL / cathode, respectively. As a result, we demonstrated that the device applying the ZnO NPs as ETL shows lower turn-on voltage and higher luminance than TiO2 based device. Further, in order to improve the luminance and luminance efficiency, we insert a PVK as HTL. As a result, luminance is enhanced three times because the PVK as HTL is complements the large energy barrier between the PEDOT:PSS and QDs as HIL and EML. By using this structure, we optimized the thickness and density of ZnO NPs and obtained better of performance of hybrid QD-LED.
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