Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 46, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/46/2/024008
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Funding
- NSF [Solar: DMR-0934433]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0934433] Funding Source: National Science Foundation
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A scalable procedure for nano-patterning the bulk heterojunction layer in organic photovoltaic (OPV) devices is reported. Nano-patterning is shown to increase light absorption in poly(3-hexylthiophene) : [6,6]-phenyl-C61-butyric acid methyl ester (P3HT : PCBM) devices (ITO\WO3\P3HT : PCBM\Ca\Al). Nano-patterning also modifies electric fields in OPV devices, thus affecting charge harvesting. Nano-patterned OPV devices with a power conversion efficiency of 4% are presented. Comparable efficiencies are also obtained by optimization of thicknesses in a flat-layer device. Trade-offs between absorption enhancement and charge harvesting deterioration induced by nano-patterning are discussed as well as possible optimization strategies.
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