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- W2011936411 abstract "Incorporation of electrotropic additives with large molecular dipole moments into the bulk heterojunction layer of organic photovoltaic devices followed by electric field poling led to an increase of power conversion efficiency up to 7.97% from 7.17% for devices that did not utilize the additives and from 5.18% for devices with additives prior to poling. The improvement is due to more efficient extraction of photogenerated charge carriers, resulting in higher short circuit current density and fill factor. The observed effects are proposed to arise from a re-orientation of additive molecules in the external electric field, i.e., electrotropism, leading to a macroscopic alignment of their dipole moments. This leads to an increased built-in electrostatic potential difference in the device active layer post-poling. The dependence of device performance on the polarity of poling bias and reversibility of the effect are demonstrated, further supporting the proposed mechanism." @default.
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- W2011936411 date "2015-03-09" @default.
- W2011936411 modified "2023-10-06" @default.
- W2011936411 title "Raising efficiency of organic solar cells with electrotropic additives" @default.
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- W2011936411 doi "https://doi.org/10.1063/1.4914847" @default.
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