Abstract
Novel tetraarylsilane-centred compounds (DCzSiPy and DDCzSi) have been introduced in fabricating efficient white organic light-emitting diodes. Owing to its bipolar transportation characteristics of DCzSiPy, more balanced charge carrier injected into the emitting layer is achieved when it is selected as a single host. Here, double-carbazole-based material DDCzSi is used as hole-transporting layer despite that it is previously reported as a host for blue-phosphorescent organic light-emitting diodes. Highly efficient white phosphorescent organic light-emitting diodes with single-host structures are demonstrated. The maximum current efficiency is 41.5 cd A−1 and the maximum power efficiency is 39.4 lm W−1. And the external quantum efficiency roll-off from maximum to that at 5000 cd m−2 is only 19.8%. We adjust the proportion of the blue/orange emitting layer, lower roll-off of 14.7% is obtained. However, the maximum current efficiency and power efficiency are reduced to 36.7 cd A−1 and 33.2 lm W−1, respectively.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
