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The role of non-solvent swelling in bulk hetero junction solar cells

Title
The role of non-solvent swelling in bulk hetero junction solar cells
Authors
Jeon, JH[Jeon, Ji Hye]Lee, HK[Lee, Hang Ken]Wang, DH[Wang, Dong Hwan]Park, JH[Park, Jong Hyeok]Park, OO[Park, O. Ok]
DGIST Authors
Park, OO[Park, O. Ok]
Issue Date
2012-07
Citation
Solar Energy Materials and Solar Cells, 102, 196-200
Type
Article
Article Type
Article
Keywords
AcetonitrileActive LayerActive Layer TreatmentAnnealingAtomic Force MicroscopyAuger Electron SpectroscopyConversion EfficiencyNon-Solvent TreatmentNon-SolventsOrganic Photovoltaic (OPV)Organic PhotovoltaicsOrganic SolventsPost-AnnealingSolvent AnnealingSolventsSurface RoughnessSwellingX Ray Diffraction
ISSN
0927-0248
Abstract
The morphology and self-organization control of the active layer in solar cells based on poly(3-hexylthiophene): [6,6]-phenyl-C-61-buytyric acid methyl ester (P3HT:PCBM) is studied by applying a non-solvent swelling treatment, where an acetonitrile solution is applied on top of the active layer for 10 min, followed by a spin-coating process to remove the non-solvent. After non-solvent swelling treatment, the optical absorption spectra for the active layer films indicated a red shift with developing features of P3HT, and X-ray diffraction (XRD) measurement data show the improvement of the effective interchain stacking of P3HT. Auger electron spectroscopy (AES) results clearly show that the inter-diffusion region between the active layer and cathode is enhanced. Atomic force microscopy (AFM) data show increasing surface roughness, which would lead to increased collection of charges and thus improved efficiency. When the non-solvent swelling method was combined with the post thermal annealing treatment, synergistic effects for the enhancement of power conversion efficiency were observed: post-thermal annealing only: 2.64%, non-solvent treatment only: 1.58%, non-solvent treatment and post-thermal annealing: 3.01% efficiency. © 2012 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/2460
DOI
10.1016/j.solmat.2012.03.002
Publisher
Elsevier B.V.
Files:
There are no files associated with this item.
Collection:
Energy Science and EngineeringETC1. Journal Articles


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