2009•Information DisplayRequires access
Printable phosphorescent organic light‐emitting devices
Sean Xia, K. O. Cheon, Jason Brooks, M. Rothman, Tan Ngo, Patrick Hett, Raymond C. Kwong, M. Inbasekaran, Julie J. Brown, Takuya Sonoyama, Masaki Ito, Shunichi Seki, Satoru Miyashita
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Abstract
A new approach to full‐color printable phosphorescent organic light‐emitting devices (P2OLEDs) is reported. Unlike conventional solution‐processed OLEDs that contain conjugated polymers in the emissive layer, the P2OLED's emissive layer consists of small‐molecule materials. A red P2OLED that exhibits a luminous efficiency of 11.6 cd/A and a projected lifetime of 100,000 hours from an initial luminance of 500 cd/m2, a green P2OLED with a luminous efficiency of 34 cd/A and a projected lifetime of 63,000 hours from an initial luminance of 1000 cd/m2, a light‐blue P2OLED with a luminous efficiency of 19 cd/A and a projected lifetime 6000 hours from an initial luminance of 500 cd/m2, and a blue P2OLED with a luminous efficiency of 6.2 cd/A and a projected lifetime of 1000 hours from an initial luminance of 500 cd/m2 is presented.