Periodically arranged colloidal gold nanoparticles for enhanced light harvesting in organic solar cells

Mina Mirsafaei, André Luis Fernandes Cauduro, Casper Kunstmann-Olsen, Adam Michael Davidson, Søren Hassing, Martin A.B. Hedegaard, Horst-Günter Rubahn, Jost Adam, Morten Madsen

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


Although organic solar cells show intriguing features such as low-cost, mechanical flexibility and light weight, their efficiency is still low compared to their inorganic counterparts. One way of improving their efficiency is by the use of light-trapping mechanisms from nano- or microstructures, which makes it possible to improve the light absorption and charge extraction in the device’s active layer. Here, periodically arranged colloidal gold nanoparticles are demonstrated experimentally and theoretically to improve light absorption and thus enhance the efficiency of organic solar cells.
Surface-ordered gold nanoparticle arrangements are integrated at the bottom electrode of organic solar cells. The resulting optical interference and absorption effects are numerically investigated in bulk hetero-junction solar cells based
on the Finite-Difference Time-Domain (FDTD) and Transfer Matrix Method (TMM) and as a function of size and periodicity of the plasmonic arrangements. In addition, light absorption enhancement in the organic active layer is investigated experimentally following integration of the nanoparticle arrangements. The latter are fabricated using a lithography-free stamping technique, creating a centimeter scaled area with nanoparticles having a defined inter-particle spacing. Our study reveals the light harvesting ability of template-assisted nanoparticle assemblies in organic solar cells.As the approach is easily scalable, it is an efficient and transferable method for large-scale, low cost device fabrication.
Original languageEnglish
Title of host publicationPhotonics for Solar Energy Systems VI
EditorsRalf B. Wehrspohn, Andreas Gombert, Alexander N. Sprafke
Number of pages11
PublisherSPIE - International Society for Optical Engineering
Publication date29. Apr 2016
Article number989810
ISBN (Electronic)9781510601437
Publication statusPublished - 29. Apr 2016
EventSPIE Photonics Europe 2016 - SQUARE Brussels Meeting Centre, Brussels, Belgium
Duration: 3. Apr 20167. Jun 2016


ConferenceSPIE Photonics Europe 2016
LocationSQUARE Brussels Meeting Centre
Internet address
SeriesProceedings of SPIE, the International Society for Optical Engineering


  • Plasmonic nanoparticles, organic semiconductors, organic solar cells, light-trapping, soft nano-imprint lithography, gold nanoparticles


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