4.8 Article

Phosphorescent Light-Emitting Transistors: Harvesting Triplet Excitons

Journal

ADVANCED MATERIALS
Volume 21, Issue 48, Pages 4957-+

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.200900919

Keywords

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Funding

  1. Air Force Office of Scientific Research
  2. National Science Foundation [NSF-DMR-0602280]
  3. EPSRC
  4. Australian Research Council [FF0668728]
  5. EPSRC [EP/C542401/1, EP/C542398/1] Funding Source: UKRI
  6. Direct For Mathematical & Physical Scien
  7. Division Of Materials Research [0856060] Funding Source: National Science Foundation
  8. Engineering and Physical Sciences Research Council [EP/C542398/1, EP/C542401/1] Funding Source: researchfish

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Phosphorescent light-emitting transistors, in which light emission from singlet and triplet energy levels is harvested using solution-processed materials (see figure), are presented. While a green phosphorescent dendrimer exhibits an external quantum efficiency of 0.45% at 480 cd m(-2), a red polymer/phosphorescent small-molecule blend produces a brightness exceeding 30 cd m(-2) with a relatively high hole mobility of 2.5 x 10(-2) cm(2) V-1 s(-1).

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