Charge recombination in CuPc/PTCDA thin films

Journal of Physical Chemistry B

Volumn 109, Issue 23, 2005, Pages 11693-11696

  Heutz, S ^a,b   Nogueira, A F ^a,c   Durrant, J R ^a   Jones, T S ^a  

^a IMPERIAL COLLEGE LONDON   (United Kingdom)

^b UNIVERSITY COLLEGE LONDON   (United Kingdom)

^c UNIVERSITY OF CAMPINAS   (Brazil)

Author keywords

[No Author keywords available]

Indexed keywords

ABSORPTION SPECTROSCOPY; ADSORPTION; AROMATIC COMPOUNDS; ATOMIC FORCE MICROSCOPY; CARBOXYLATION; CHARGE CARRIERS; COPPER COMPOUNDS; FILM GROWTH; HETEROJUNCTIONS; POLARONS; POLYMER BLENDS; REACTION KINETICS; SEMICONDUCTING ORGANIC COMPOUNDS; VACUUM APPLICATIONS;

COPPER PHTHALOCYANINE (CUPC); PERYLENE-3,4,9,10-TETRACARBOXYLIC DIANHYDRIDE (PTCDA); PHOTOVOLTAICS (PV); RECOMBINATION KINETICS;

THIN FILMS;

EID: 21644478144     PISSN: 15206106     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp050298l     Document Type: Article

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22. -3.
23. Determination of the quantum yield of the long-lived polarons addressed in this study is difficult to quantify in the absence of an independent measurement of the molar absorption coefficient of PTCDA anions. However, the magnitude of our absorption transients at 800 nm for the CuPc/PTCDA heterostructure is consistent with a significant proportion of the photogenerated polarons decaying on the micro- and millisecond time scales addressed here. Further studies extending these studies to nanosecond time scales are currently in progress. For the PTCDA single-layer structures, the smaller magnitude of the absorption transients is indicative of an approximately 10-fold lower yield of long-lived polarons.