PLASMA TREATMENT OF ELECTROPHORETICALLY DEPOSITED CARBON
NANOTUBE TRANSPARENT ANODES FOR THE DEVELOPMENT OF ORGANIC SOLAR
CELLS 1 Dip. di Ingegneria Civile e Ambientale, Universit di
Perugia, NIPLAB-INSTM UdR Perugia, Pentima Bassa 21, Terni, 05100
(TR) - ITALY 2 Dip. di Chimica, Universit di Modena e Reggio
Emilia, Via Campi, 183, Modena, 41100 (MO) - ITALY D. Bagnis 1, L.
Valentini 1, R. Cagnoli 2, F. Mengoni 1, A. Mucci 2, L. Schenetti
2, J.M. Kenny 1 PD16 Slide 2 Our Device Architecture Fluorine Doped
Tin Oxide (FTO) (Tec Glass 15, surface resistance 14 /sq) was
immersed into a nanotube suspension of CH 3 CN and kept parallel to
an opposite gold electrode (2 cm apart). A dc voltage of +4 V was
applied to the FTO electrode maintaining the gold plate at ground
the deposition of carbon nanotube films was observed on the
positive electrode. After electrodeposition, the e-SWCNT thin films
were plasma treated in oxygen or CF 4 atmosphere. The
photosensitive PTCOOH film was deposited by drop- casting the THF
solution of the polymer.
Poly[7-(thien-3-ylsulfanyl)heptanoicacid]-co-thiophene PD16 Slide 3
FESEM images of three different hybrid anodes: (a) e-SWCNT/FTO, (b)
CF 4 plasma treated e-SWCNT/FTO and (c) Oxygen plasma treated
e-SWCNT/FTO Plasma Induced Fragmentation of Carbon Nanotube
Transmittance in the visible and near-infrared regions for
e-SWCNT/FTO, CF 4 plasma treated e-SWCNT/FTO and Oxygen plasma
treated e-SWCNT/FTO. PD16 Slide 4 Height topography (left pictures)
and phase topography (right pictures) AFM images (8X8 m 2 ) of
PTCOOH / FTO. PTCOOH / CF 4 plasma treated e-SWCNT / FTO. PTCOOH /
oxygen plasma treated e-SWCNT / FTO. PD16 Slide 5 Samples V OC [V]
J SC [mA/cm 2 ] FF [%] PTCOOH / FTO 0.480.0450.250.01 PTCOOH /
e-SWNTs / FTO 0.750.230.220.05 JV curve under illumination for the
organic solar cell prepared with neat FTO anode. JV curve under
illumination for the organic solar cell prepared with oxygen plasma
treated e- SWCNTs/FTO anode. Glass Al PTCOOH e-SWCNTs FTO Active
Area AM 1.5G (76 mW/cm 2 ) PD16 Slide 6 CONCLUDING REMARKS We have
demonstrated that PTCOOH can be drop-casted onto a SWCNT electrode
thin film to form a new type of functional nanostructure. The
excellent conductivity and the semiconducting behaviour of the
nanocomposite are envisaged to make it very useful for the
development of electronic micro-devices for practical applications.
We propose the use of electrophoretically deposited SWCNT thin
films as anodes in polymer solar cells. It was found that a surface
plasma treatment of the SWCNT anodes leads to the formation of an
absorptive nanostructure which collects more charges from the
polymer than that of the neat FTO in contact with the polymer.
PD16
