Conference Program - LOPE-C 2011

SCIENTIFIC CONF. | THURSDAY-JUNE 30, 2011
Track 5
OLEDs and OPV (11:30 am - 01:20 pm) | LOCATION HARMONIE E / LEVEL C2
12:40 pm Progress towards realization of all solution processed ITO free OPV
Dr Jan Kroon,
ECN , Project manager/scientist, Netherlands
The growing interest in organic photovoltaics (OPV) is caused by their promise
for low cost energy conversion. In order to have an impact on the power generation
market on the longer term, OPV should combine high power conversion efficiency with
low production costs, high speed production, short energy payback time (EPT), contain
only abundant materials and yield long term device stability. In order to address these
requirements, we have developed and proved a set of device structures.
To replace ITO, a device concept is developed based on highly conductive and
solution processed PEDOT in combination with printed silver grids. Apart from the cost
saving aspects by replacing sputtered and post-patterned ITO it is demonstrated by
modeling that the individual cell dimensions can be substantially larger without
decreasing actually the cell performance.
Another device concept has been developed in which polymer solar cells are built
on metal foils. These devices dwell on the well known ?inverted? polymer solar cell
device structure with proven advantages in terms of device lifetime. Since a metal foil is
applied as substrate, an excellent combination of flexibitity and barrier properties is
inherent to this device concept.
By combining elements of the above described cells, a novel polymer solar cell
structure is manufactured in which all layers, including electrodes, are solution processed.
This roll-to-roll compatible device yields an efficiency of 2.5 % (P3HT:PCBM as active
layer).
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