Effects of nano-patterned versus simple flat active layers in upright organic photovoltaic devices

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). Na...

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Published inJournal of physics. D, Applied physics Vol. 46; no. 2; pp. 24008 - 1-9
Main Authors Liu, Yingchi, Kirsch, Christoph, Gadisa, Abay, Aryal, Mukti, Mitran, Sorin, Samulski, Edward T, Lopez, Rene
Format Journal Article
LanguageEnglish
Published IOP Publishing 16.01.2013
Subjects
Charge
Devices
Electric charge
Harvesting
Nanocomposites
Nanomaterials
Nanostructure
Solar cells
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Summary: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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ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/46/2/024008