High efficiency flexible ITO-free polymer/fullerene photodiodes.
We report efficient polymer photodiodes fabricated on flexible polyethyleneterephthalate (PET) substrates. The PET substrates were coated with a layer of poly(3,4-ethylene-dioxythiophene): polystyrenesulfonate (PEDOT:PSS) that was lithographically patterned to define the anode structure. A blend of poly(3-hexylthiophene) (P3HT) and 1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6)C61 (PCBM) was then spin-coated from a 1 : 1 mixture by weight of the two components in dichlorobenzene, and the device was completed by vacuum deposition of an aluminium electrode in vacuum. The resulting photodiodes had short-circuit quantum efficiencies of 45% and peak power efficiencies of 3%, which compare favourably with values for similar devices fabricated on rigid indium tin oxide (ITO) coated glass substrates.
Huang
J
J
Blackett Laboratory, Imperial College London, London, UK.
Wang
X
X
Kim
Y
Y
deMello
A J
AJ
Bradley
D D C
DD
deMello
J C
JC
D004563:Electrochemistry; D004566:Electrodes; D037741:Fullerenes / Q000737:chemistry*; D008958:Models, Molecular; D011093:Polyethylene Terephthalates / Q000737:chemistry*; D013053:Spectrophotometry; D017971:Tin Compounds / Q000737:chemistry*
C551883:1-(3-methoxycarbonyl)propyl-1-phenyl-(6,6)C61; D037741:Fullerenes; D011093:Polyethylene Terephthalates; D017971:Tin Compounds; C109984:indium tin oxide