Tuning the energy level offset between donor and acceptor with ferroelectric dipole layers for increased efficiency in bilayer organic photovoltaic cells.
Ultrathin ferroelectric polyvinylidene fluoride (70%)-tetrafluoroethylene (30%) copolymer film is inserted between the poly3(hexylthiophene) (P3HT) donor and [6,6]-phenyl-C61-butyric acid methylester (PCBM) acceptor layers as the dipole layer to tune the relative energy levels, which can potentially maximize the open circuit voltage of bilayer organic solar cells. In this work, the power conversion efficiency of P3HT/PCBM bilayer solar cells is demonstrated to be doubled with the inserted dipoles.
Department of Mechanical and Materials Engineering and Nebraska, Center for Materials and Nanoscience, University of Nebraska-Lincoln, 68588-0656, USA.
Bin
B
Yang
Yongbo
Y
Yuan
Pankaj
P
Sharma
Shashi
S
Poddar
Rafal
R
Korlacki
Stephen
S
Ducharme
Alexei
A
Gruverman
Ravi
R
Saraf
Jinsong
J
Huang
D001846:Bone Development; D011211:Electric Power Supplies; D004560:Electricity; D008422:Materials Testing; D008567:Membranes, Artificial; D009930:Organic Chemicals / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D012666:Semiconductors; D013816:Thermodynamics
D008567:Membranes, Artificial; D009930:Organic Chemicals; D011108:Polymers