High-efficiency non-blocking phosphorescent organic light emitting diode with ultrathin emission layer

Jacky Qiu; Michael G. Helander; Zhibin Wang; Yi-Lu Chang; ZhengHong Lu

doi:10.1117/12.929976

13 September 2012 High-efficiency non-blocking phosphorescent organic light emitting diode with ultrathin emission layer

Jacky Qiu, Michael G. Helander, Zhibin Wang, Yi-Lu Chang, ZhengHong Lu

Author Affiliations +

Proceedings Volume 8476, Organic Light Emitting Materials and Devices XVI; 84761S (2012) https://doi.org/10.1117/12.929976
Event: SPIE Organic Photonics + Electronics, 2012, San Diego, California, United States

Abstract

Non-blocking Phosphorescent Organic Light Emitting Diode (NB-PHOLED) is a highly simplified device structure that has achieved record high device performance on chlorinated ITO[1], flexible substrates[2], also with Pt based phosphorescent dopants[3] and NB-PHOLED has significantly reduced efficiency roll-off[4]. The principle novel features of NB-PHOLED is the absence of blocking layer in the OLED stack, as well as the absence of organic hole injection layer, this allows for reduction of carrier accumulation in between organic layers and result in higher efficiencies.

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Jacky Qiu, Michael G. Helander, Zhibin Wang, Yi-Lu Chang, and ZhengHong Lu "High-efficiency non-blocking phosphorescent organic light emitting diode with ultrathin emission layer", Proc. SPIE 8476, Organic Light Emitting Materials and Devices XVI, 84761S (13 September 2012); https://doi.org/10.1117/12.929976

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KEYWORDS

Electroluminescence

Organic light emitting diodes

Doping

Excitons

Applied physics

External quantum efficiency

Platinum

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