TY - JOUR
T1 - Energy transfer and exciplex formation and their impact on exciton and charge carrier dynamics in organic films
AU - Shepherd, Whitney E.B.
AU - Platt, Andrew D.
AU - Kendrick, Mark J.
AU - Loth, Marsha A.
AU - Anthony, John E.
AU - Ostroverkhova, Oksana
PY - 2011/3/3
Y1 - 2011/3/3
N2 - We report Förster resonant energy transfer (FRET) with a Förster radius R0 of 4.8 nm and exciplex formation in composites containing two functionalized anthradithiophene (ADT) derivatives, ADT-TES-F (donor, D) and ADT-TIPS-CN (acceptor, A) depending on the D-A distance. In composites containing bulk D/A heterojunctions, exciplex photoluminescence (PL) emission peaked at ∼668 nm dominated the PL spectra. The exciplex contributed to charge carrier photogeneration on nanosecond time scales in composites, in contrast to sub-500 ps carrier photogeneration observed in ADT-TES-F pristine films. Finally, significantly slower charge carrier recombination was obtained in composites, as compared to that of pristine ADT-TES-F films, due to electron trapping at the ADT-TIPS-CN enabling the hole to propagate in the ADT-TES-F host.
AB - We report Förster resonant energy transfer (FRET) with a Förster radius R0 of 4.8 nm and exciplex formation in composites containing two functionalized anthradithiophene (ADT) derivatives, ADT-TES-F (donor, D) and ADT-TIPS-CN (acceptor, A) depending on the D-A distance. In composites containing bulk D/A heterojunctions, exciplex photoluminescence (PL) emission peaked at ∼668 nm dominated the PL spectra. The exciplex contributed to charge carrier photogeneration on nanosecond time scales in composites, in contrast to sub-500 ps carrier photogeneration observed in ADT-TES-F pristine films. Finally, significantly slower charge carrier recombination was obtained in composites, as compared to that of pristine ADT-TES-F films, due to electron trapping at the ADT-TIPS-CN enabling the hole to propagate in the ADT-TES-F host.
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U2 - 10.1021/jz101698q
DO - 10.1021/jz101698q
M3 - Article
AN - SCOPUS:79952331181
VL - 2
SP - 362
EP - 366
JO - Journal of Physical Chemistry Letters
JF - Journal of Physical Chemistry Letters
IS - 5
ER -