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Author Park, Yoonseok ♦ Müller-Meskamp, Lars ♦ Vandewal, Koen ♦ Leo, Karl
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ ELECTRODES ♦ LAYERS ♦ LIGHT SCATTERING ♦ NANOPARTICLES ♦ OPTOELECTRONIC DEVICES ♦ PHOTONS ♦ PHOTOVOLTAIC EFFECT ♦ RANDOMNESS ♦ TEXTURE ♦ THIN FILMS ♦ TIN OXIDES ♦ TITANIUM OXIDES ♦ TRAPPING ♦ WAVELENGTHS
Abstract The performance of organic optoelectronic devices can be improved by employing a suitable optical cavity design beyond the standard plane layer approach, e.g., by the inclusion of periodically or randomly textured structures which increase light incoupling or extraction. One of the simplest approaches is to add an additional layer containing light scattering particles into the device stack. Solution processed poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) thin films are promising for replacing the brittle and expensive indium tin oxide transparent electrode. We use a blend of 100 nm TiO{sub 2} scattering particles in PEDOT:PSS solution to fabricate transparent electrode films which also functions as a scattering layer. When utilized in an organic photovoltaic device, a power conversion efficiency of 7.92% is achieved, which is an 8.6% relative improvement compared to a device with a neat PEDOT:PSS electrode without the nanoparticles. This improvement is caused by an increase in short-circuit current due to an improved photon harvesting in the 320 nm–700 nm spectral wavelength range.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-06-20
Publisher Place United States
Journal Applied Physics Letters
Volume Number 108
Issue Number 25


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