35.2: Improved Efficiency and Lifetime by Tailoring the Charge Carrier Supply in OLEDs

35.2: Improved Efficiency and Lifetime by Tailoring the Charge Carrier Supply in OLEDs

The electron and hole supply into the recombination zone of an OLED is of crucial importance to achieve optimum performance. By adjusting the energetic levels of the transport and the blocking layers we optimize lifetime and power efficiency of blue and red fluorescent PIN OLEDs. for a red OLED, we...

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Veröffentlicht in:SID International Symposium Digest of technical papers 2009-06, Vol.40 (1), p.495-498
Hauptverfasser: Rothe, Carsten, Werner, Ansgar, Fadhel, Omrane, Limmert, Michael, Canzler, Tobias W., Birnstock, Jan
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container_issue 1
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container_title SID International Symposium Digest of technical papers
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creator Rothe, Carsten
Werner, Ansgar
Fadhel, Omrane
Limmert, Michael
Canzler, Tobias W.
Birnstock, Jan
description The electron and hole supply into the recombination zone of an OLED is of crucial importance to achieve optimum performance. By adjusting the energetic levels of the transport and the blocking layers we optimize lifetime and power efficiency of blue and red fluorescent PIN OLEDs. for a red OLED, we achieve 100 cd/m2 below 2 V. By deliberately introducing barriers in the electron supply of red fluorescent OLEDs, we can “switch on” triplet‐triplet annihilation, leading to a significant boost in efficiency — up to 12 % external quantum efficiency were measured in an integrating sphere.
doi_str_mv 10.1889/1.3256824
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title 35.2: Improved Efficiency and Lifetime by Tailoring the Charge Carrier Supply in OLEDs
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