Journal
NANO LETTERS
Volume 12, Issue 8, Pages 4146-4152Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl301709x
Keywords
Organic photovoltaics; copper iodide nanocrystals; heterojunction; glancing angle deposition; vacuum evaporation
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Funding
- Japan Science and Technology Agency (JST)
- Nanotechnology Network Japan MEXT, Japan
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We report a simple method to achieve efficient nanostructured organic photovoltaics via patterning copper iodide (CuI) nanocrystals on indium tin oxide by glancing angle deposition. The strong interfacial interaction between zinc phthalocyanine (ZnPc) and CuI leads to the formation of nanopillar arrays with lying-down molecular order, which greatly improve light absorption and surface roughness for exciton dissociation. Optimized ZnPc/C-60 bilayer cell has a power conversion efficiency of 4.0 +/- 0.1%, which is about 3-fold larger than that conventional planar cell.
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