4.8 Article

High Upconversion Efficiency from Hetero Triplet-Triplet Annihilation in Multiacceptor Systems

Journal

JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 4, Issue 14, Pages 2334-2338

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/jz401213w

Keywords

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Funding

  1. National Science Foundation [CBET-0931677, CBET-1065633]
  2. DoD Award [DM102420, W81XWH-11-2-0103]
  3. Div Of Chem, Bioeng, Env, & Transp Sys
  4. Directorate For Engineering [1065633] Funding Source: National Science Foundation

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We report the observation of very high triplet triplet annihilation (TTA) upconversion efficiency in single-sensitizer/multiacceptor systems. A hetero-TTA process between triplet acceptors of different types is believed to account for the synergistic effect leading to the high upconversion efficiency. The upconversion quantum yield of the dual-acceptor system is much higher than the sum of the two single-acceptor systems.

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