Laser-Induced Periodic Surface Structures on P3HT and on Its Photovoltaic Blend with PC71BM.
We describe the conditions for optimal formation of laser-induced periodic surface structures (LIPSS) over poly(3-hexylthiophene) (P3HT) spin-coated films. Optimal LIPSS on P3HT are observed within a particular range of thicknesses and laser fluences. These conditions can be translated to the photovoltaic blend formed by the 1:1 mixture of P3HT and [6,6]-phenyl C71-butyric acid methyl ester (PC71BM) when deposited on an indium tin oxide (ITO) electrode coated with (poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS). Solar cells formed by using either a bilayer of P3HT structured by LIPSS covered by PC71BM or a bulk heterojunction with a P3HT:PC71BM blend structured by LIPSS exhibit generation of electrical photocurrent under light illumination. These results suggest that LIPSS could be a compatible technology with organic photovoltaic devices.
Instituto de Estructura de la Materia (IEM-CSIC) , Serrano 121, 28006 Madrid, Spain.
Jing
J
Cui
Instituto de Estructura de la Materia (IEM-CSIC) , Serrano 121, 28006 Madrid, Spain.
Álvaro
Á
Rodríguez-Rodríguez
Instituto de Estructura de la Materia (IEM-CSIC) , Serrano 121, 28006 Madrid, Spain.
Margarita
M
Hernández
Instituto de Estructura de la Materia (IEM-CSIC) , Serrano 121, 28006 Madrid, Spain.
Mari-Cruz
MC
García-Gutiérrez
Instituto de Estructura de la Materia (IEM-CSIC) , Serrano 121, 28006 Madrid, Spain.
Aurora
A
Nogales
Instituto de Química Física Rocasolano (IQFR-CSIC) , Serrano 119, 28006 Madrid, Spain.
Marta
M
Castillejo
Lehrstuhl für Funktionelle Materialien, Physik-Department, Technische Universität München , James-Franck-Strasse 1, 85748 Garching, Germany.
Daniel
D
Moseguí González
Lehrstuhl für Funktionelle Materialien, Physik-Department, Technische Universität München , James-Franck-Strasse 1, 85748 Garching, Germany.
Peter
P
Müller-Buschbaum
Instituto de Estructura de la Materia (IEM-CSIC) , Serrano 121, 28006 Madrid, Spain.
Tiberio A
TA
Ezquerra
Instituto de Química Física Rocasolano (IQFR-CSIC) , Serrano 119, 28006 Madrid, Spain.
Esther
E
Rebollar
grazing incidence X-ray scattering; laser-induced periodic surface structures; organic photovoltaics; polymer films; semiconductor polymers