Journal
ADVANCED MATERIALS
Volume 22, Issue 11, Pages 1233-+Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.200902827
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Funding
- Department of Energy EERE Program
- Air Force Office of Scientific Research
- Global Photonic Energy Corp
- Wiley InterScience
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The effect of crystalline order on the exciton diffusion length (L-D) is shown for the archetypal organic semiconductor 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA; see figure). L-D increases from similar to 6.5 nm in the amorphous limit to similar to 25 nm for single crystals. These changes in diffusion length are connected to changes in the fluorescence quantum yield, which is useful for understanding where crystal-size-dependant diffusion trends are likely to be observed for other organic materials.
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