The mechanism of charge generation in charge generation units containing HATCN for high-luminance tandem OLED display

Sunghun Lee; Jeong-Hwan Lee; Jae-Hyun Lee; Jang-Joo Kim

doi:10.1117/12.929559

13 September 2012 The mechanism of charge generation in charge generation units containing HATCN for high-luminance tandem OLED display

Sunghun Lee, Jeong-Hwan Lee, Jae-Hyun Lee, Jang-Joo Kim

Author Affiliations +

Proceedings Volume 8476, Organic Light Emitting Materials and Devices XVI; 84761N (2012) https://doi.org/10.1117/12.929559
Event: SPIE Organic Photonics + Electronics, 2012, San Diego, California, United States

Abstract

We report the rate limiting step of charge generation in the charge generation units (CGUs) composed of a p-HTL, HATCN and n-doped electron transporting layer (n-ETL) where TAPC was used as the HTL. Energy level alignment determined by the capacitance-voltage (C-V) measurements and the current density-voltage characteristics of the structure clearly showed that the electron injection at the HATCN/n-ETL junction limits the charge generation in the CGUs rather than charge generation itself at the p-HTL/HATCN junction. Consequently, the CGUs with 30 mol% Rb₂CO₃ doped BPhen formed with the HATCN layer generates charges very efficiently and the excess voltage required to generate the current density of ±10 mA/cm² was around 0.17 V, which is extremely small compared with the literature values reported up to now.

Citation Download Citation

Sunghun Lee, Jeong-Hwan Lee, Jae-Hyun Lee, and Jang-Joo Kim "The mechanism of charge generation in charge generation units containing HATCN for high-luminance tandem OLED display", Proc. SPIE 8476, Organic Light Emitting Materials and Devices XVI, 84761N (13 September 2012); https://doi.org/10.1117/12.929559

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