The development of transparent conductive electrodes represents a challenge for the development of solar cells. For this reason there is an academic and research growing interest in depositing transparent and conductive single-walled carbon nanotube (SWCNT) thin films for applications in the area of optoelectronics [1,2]. In this regard, more recently, transparent films of SWCNT have been used in poly(3-hexylthiophene)/[6,6]-phenyl C61 butyric acid methyl ester (P3HT/PCBM) based solar cells [3]. Basically, it was proposed how the CNT is a much more efficient 3-D charge collector, due to its network topology, for infiltration of P3HT/PCBM nanocomposites. In this work a conducting polymer (Poly[7-(thien-3-ylsulfanyl)heptanoic acid]-co-thiophene (PTCOOH)) [4] deposited on an electrophoretically deposited carbon nanotube electrode has been evaluated for photovoltaic conversion. Bundled carboxy-SWCNT thin films have been deposited on conductive substrate (Fluorine Doped Tin Oxide (FTO) Tec Glass 15® coated glass, surface resistance 14/sq) under the influence of a DC electric field; the subsequent use of oxygen plasma treatment leads to the formation of a SWCNT adsorptive nanostructure. We report that combining plasma treated carboxy-SWCNT network with PTCOOH leads to an increase of the open-circuit voltage and the short-circuit current of about one order of magnitude. We attribute this effect to an enhanced hole collection by the nanotube electrode.
PLASMA TREATMENT OF ELECTROPHORETICALLY DEPOSITED CARBON NANOTUBE TRANSPARENT ANODES FOR THE DEVELOPMENT OF ORGANIC SOLAR CELLS
VALENTINI, LUCA;KENNY, Jose Maria
2007
Abstract
The development of transparent conductive electrodes represents a challenge for the development of solar cells. For this reason there is an academic and research growing interest in depositing transparent and conductive single-walled carbon nanotube (SWCNT) thin films for applications in the area of optoelectronics [1,2]. In this regard, more recently, transparent films of SWCNT have been used in poly(3-hexylthiophene)/[6,6]-phenyl C61 butyric acid methyl ester (P3HT/PCBM) based solar cells [3]. Basically, it was proposed how the CNT is a much more efficient 3-D charge collector, due to its network topology, for infiltration of P3HT/PCBM nanocomposites. In this work a conducting polymer (Poly[7-(thien-3-ylsulfanyl)heptanoic acid]-co-thiophene (PTCOOH)) [4] deposited on an electrophoretically deposited carbon nanotube electrode has been evaluated for photovoltaic conversion. Bundled carboxy-SWCNT thin films have been deposited on conductive substrate (Fluorine Doped Tin Oxide (FTO) Tec Glass 15® coated glass, surface resistance 14/sq) under the influence of a DC electric field; the subsequent use of oxygen plasma treatment leads to the formation of a SWCNT adsorptive nanostructure. We report that combining plasma treated carboxy-SWCNT network with PTCOOH leads to an increase of the open-circuit voltage and the short-circuit current of about one order of magnitude. We attribute this effect to an enhanced hole collection by the nanotube electrode.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
