Nanoscale functional interlayers formed through spontaneous vertical phase separation in polymer photovoltaic devices

A nanoscale interlayer formed through spontaneous vertical phase separation enhances the efficiency and stability of polymer solar cells. Poly(ethylene glycol) molecules blended into the photoactive layer spontaneously migrate to the surface of the polymer blend to form the interfacial buffer, there...

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Bibliographic Details
Published in:Journal of materials chemistry 2009-01, Vol.19 (37), p.6865-6869
Main Authors: CHEN, Fang-Chung, CHIEN, Shang-Chieh
Format: Article
Language:English
Subjects:
Applied sciences
Condensed matter: structure, mechanical and thermal properties
Energy
Equations of state, phase equilibria, and phase transitions
Exact sciences and technology
Natural energy
Photovoltaic conversion
Physics
Solar cells. Photoelectrochemical cells
Solar energy
Solubility, segregation, and mixing
phase separation
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Summary:A nanoscale interlayer formed through spontaneous vertical phase separation enhances the efficiency and stability of polymer solar cells. Poly(ethylene glycol) molecules blended into the photoactive layer spontaneously migrate to the surface of the polymer blend to form the interfacial buffer, thereby reducing the contact resistance after undergoing chemical reactions with the Al atoms of the cathode. The vertical phase separation of PEG molecules in the device were investigated by using depth profiling scanning electron microscopy and atomic force microscopy.
ISSN:0959-9428
1364-5501
DOI:10.1039/b907773a