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Controlling intercalations of PBDTTT-EFT side chain to initiate suitable network for charge extraction in PBDTTT-EFT:PC71BM blended bulk heterojunction solar cell

Electrical, optical and structural properties, based on blend of PBDTTT-EFT:PC71BM bulk heterojunction solar cell is investigated. We have shown the presence of PC71BM in the blend facilitates interfaces for charge transfer mechanisms leading to PCEs of ∼9.38%. GIXRD line profile obtained reveals th... Full description

Contained in: Solar Energy Materials and Solar Cells Vol. 175 (2018), p. 35-40
Journal Title: Solar Energy Materials and Solar Cells
Fulltext access:
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Links: Additional Link (dx.doi.org)
Additional Keywords: COPOLYMER
ELEKTRON
ENERGIEUMWANDLUNG
HETEROUEBERGANG
LADUNGSUEBERTRAGUNG
MISCHUNGSVERHAELTNIS
RAMAN-SPEKTROSKOPIE
RAUIGKEIT
SOLARZELLE
STOFFGEMISCH
THIOPHEN
ZWISCHENSCHICHT
DOI: 10.1016/j.solmat.2017.10.007
Notes: Copyright: Metadaten: TEMA, Copyright WTI-Frankfurt eG
Copyright: (C) Alle Rechte beim Herausgeber
Physical Description: 6 Seiten, 45 Quellen
ID (e.g. DOI, URN): 10.1016/j.solmat.2017.10.007
PPN (Catalogue-ID): WTI057513554
Note: WTI TEMA DB
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520 |a Electrical, optical and structural properties, based on blend of PBDTTT-EFT:PC71BM bulk heterojunction solar cell is investigated. We have shown the presence of PC71BM in the blend facilitates interfaces for charge transfer mechanisms leading to PCEs of ∼9.38%. GIXRD line profile obtained reveals that quantitative presence of PC71BM initiates a change in preferred orientation. It is proposed that PC71BM facilitates polymer alkyl side chain intercalations causing reduced d100 spacing, leading to larger π-π stacking of the back bone. The data obtained from d200 plane associated with PC71BM, reveals correlation between increased vertical stacking and PC71BM loading, suggesting a bicontinuous network for electron transport. Raman spectroscopy results provides evidence of PC71BM impact on frequency shift associated with C = C stretching mode of side chain thiophene rings responsible for of π-π spacing. Correlations between AFM surface roughness and blend ratio reveals migration of PC71BM to the film surface. [Copyright Elsevier B.V. Reproduced with permission.] 
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