Relationship between crystalline order and exciton diffusion length in molecular organic semiconductors

Richard R. Lunt; Jay Burton Benziger; Stephen R. Forrest

doi:10.1002/adma.200902827

Relationship between crystalline order and exciton diffusion length in molecular organic semiconductors

Richard R. Lunt, Jay Burton Benziger, Stephen R. Forrest

Research output: Contribution to journal › Article › peer-review

286 Scopus citations

Abstract

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 ∼6.5 nm in the amorphous limit to ∼2S 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.

Original language	English (US)
Pages (from-to)	1233-1236
Number of pages	4
Journal	Advanced Materials
Volume	22
Issue number	11
DOIs	https://doi.org/10.1002/adma.200902827
State	Published - Mar 19 2010

All Science Journal Classification (ASJC) codes

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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AU - Benziger, Jay Burton

AU - Forrest, Stephen R.

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AB - 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). LD increases from ∼6.5 nm in the amorphous limit to ∼2S 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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Relationship between crystalline order and exciton diffusion length in molecular organic semiconductors

Abstract

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