TITLE

Electromodulation of photoinduced charge transfer in polyfluorene bilayer devices

AUTHOR(S)
Dhoot, A. S.; Hogan, J. A.; Morteani, A. C.; Greenham, N. C.
PUB. DATE
September 2004
SOURCE
Applied Physics Letters;9/20/2004, Vol. 85 Issue 12, p2256
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Photoinduced charge transfer at a conjugated polymer donor-acceptor heterojunction controls the ultimate photogeneration efficiency in photovoltaic devices. We have studied this charge transfer by measurements of electric-field-induced photoluminescence (PL) modulation in polyfluorene-based bilayer devices at room and low temperatures. Depending on the field direction across the interface we observe field-induced quenching or enhancement of the PL, which we ascribe to modulation of the exciton dissociation rate through modification of the energy of the charge-transfer state formed after charge separation.
ACCESSION #
14546700

 

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