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Advanced Energy Materials
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Advanced Energy Materials
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Advanced Energy Materials
Article . 2018
License: CC BY NC
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Bilayer–Ternary Polymer Solar Cells Fabricated Using Spontaneous Spreading on Water

Authors: Fallon J. M. Colberts; Martijn M. Wienk; Ruurd Heuvel; Weiwei Li; Vincent M. Le Corre; L. Jan Anton Koster; René A. J. Janssen;

Bilayer–Ternary Polymer Solar Cells Fabricated Using Spontaneous Spreading on Water

Abstract

AbstractA new method is presented to fabricate bilayer organic solar cells via sequential deposition of bulk‐heterojunction layers obtained using spontaneous spreading of polymer–fullerene blends on a water surface. Using two layers of a small bandgap diketopyrrolopyrrole polymer–fullerene blend, a small improvement in power conversion efficiency (PCE) from 4.9% to 5.1% is obtained compared to spin‐coated devices of similar thickness. Next, bilayer–ternary cells are fabricated by first spin coating a wide bandgap thiophene polymer–fullerene blend, followed by depositing a small bandgap diketopyrrolopyrrole polymer–fullerene layer by transfer from a water surface. These novel bilayer–ternary devices feature a PCE of 5.9%, higher than that of the individual layers. Remarkable, external quantum efficiencies (EQEs) over 100% are measured for the wide bandgap layer under near‐infrared bias light illumination. Drift‐diffusion calculations confirm that near‐infrared bias illumination can result in a significant increase in EQE as a result of a change in the internal electric field in the device, but cannot yet account for the magnitude of the effect. The experimental results indicate that the high EQEs over 100% under bias illumination are related to a barrier for electron transport over the interface between the two blends.

Country
Netherlands
Keywords

spontaneous spreading, Sustainability and the Environment, RECOMBINATION, CHARGE-LIMITED CURRENTS, FILL FACTOR, bilayer-ternary solar cells, bilayer–ternary solar cells, Materials Science(all), To be checked by Faculty, POWER CONVERSION EFFICIENCY, SDG 7 - Affordable and Clean Energy, Renewable Energy, polymer solar cells, SDG 7 – Betaalbare en schone energie, sequential deposition

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    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Top 10%
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Top 10%
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Top 10%
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
29
Top 10%
Top 10%
Top 10%
Green
hybrid
Related to Research communities
Energy Research