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Fabrication and Characterization of Hybrid Organic-Inorganic Electron Extraction Layers for Polymer Solar Cells toward Improved Processing Robustness and Air Stability
Univ Sfax, Tunisia.
Aix Marseille Univ, France.
Aix Marseille Univ, France.
Aix Marseille Univ, France.
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2018 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 10, no 20, p. 17309-17317Article in journal (Refereed) Published
Abstract [en]

Organic-inorganic hybrid materials composed of bismuth and diaminopyridine are studied as novel materials for electron extraction layers in polymer solar cells using regular device structures. The hybrid materials are solution processed on top of two different low band gap polymers (PTB7 or PTB7-Th) as donor materials mixed with fullerene PC70BM as the acceptor. The intercalation of the hybrid layer between the photoactive layer and the aluminum cathode leads to solar cells with a power conversion efficiency of 7.8% because of significant improvements in all photovoltaic parameters, that is, short-circuit current density, fill factor, and open-circuit voltage, similar to the reference devices using ZnO as the interfacial layer. However when using thick layers of such hybrid materials for electron extraction, only small losses in photocurrent density are observed in contrast to the reference material ZnO of pronounced losses because of optical spacer effects. Importantly, these hybrid electron extraction layers also strongly improve the device stability in air compared with solar cells processed with ZnO interlayers. Both results underline the high potential of this new class of hybrid materials as electron extraction materials toward robust processing of air stable organic solar cells.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2018. Vol. 10, no 20, p. 17309-17317
Keywords [en]
hybrid material; interfacial layer; nanocrystals; morphology; electron extraction; solar cell
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-148652DOI: 10.1021/acsami.7b16297ISI: 000433404100043PubMedID: 29652470OAI: oai:DiVA.org:liu-148652DiVA, id: diva2:1219983
Note

Funding Agencies|Ministry of Higher Education, Scientific Research, and Technology in Tunisia; French Fond Unique Interministeriel (FUI) under the project "SFUMATO" [F1110019V/201308815]; European Commission under the Project "SUNFLOWER" (FP7-ICT-2011-7) [287594]; Swedish Research Council [2016-05498]; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University (Faculty Grant SFO Mat LiU) [2009 00971]

Available from: 2018-06-18 Created: 2018-06-18 Last updated: 2018-06-18

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