Degradation of a Thin Ag Layer Induced by Poly(3,4-ethylenedioxythiophene):Polystyrene Sulfonate in a Transmission Electron Microscopy Specimen of an Inverted Polymer Solar Cell

Title
Degradation of a Thin Ag Layer Induced by Poly(3,4-ethylenedioxythiophene):Polystyrene Sulfonate in a Transmission Electron Microscopy Specimen of an Inverted Polymer Solar Cell
Authors
서영준루 닝이 상정원석김경곤김봉수고민재김문제
Keywords
inverted polymer solar cell; Degradation; PEDOT:PSS; Ag layer; Transmission electron microscopy; particles; energy-dispersive X-ray spectroscopy
Issue Date
2012-10
Publisher
ACS Applied Materials & Interfaces
Citation
VOL 4, NO 10, 5118-5124
Abstract
It was found that the Ag electrode layer in a transmission electron microscopy (TEM) specimen of an inverted polymer solar cell structure of Ag/PEDOT:PSS/ P3HT:PCBM/TiO2/ITO/glass (where PEDOT is poly(3,4- ethylenedioxythiophene), PSS is polystyrene sulfonate, and ITO is indium tin oxide) was broken down into particles as time passed. In order to investigate the cause of Ag particle formation and the effect of the degradation on the performance of solar cells, the temporal change of the cross-sectional TEM micrographs was examined together with energy-dispersive Xray spectroscopy (EDS) analysis and electron tomography. Temporal degradation of Ag/Si and Ag/1 nm-Ti/PEDOT:PSS/ITO/ glass structures was also studied. Absorption of water by the PEDOT:PSS layer followed by corrosion of the grain boundaries of the Ag layer by the corrosive water was thought to be the reason of Ag particle formation and fast performance lowering of the device.
URI
http://pubs.kist.re.kr/handle/201004/43410
ISSN
19448244
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KIST Publication > Article
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