KIT | KIT-Bibliothek | Impressum
DOI: 10.1021/acsami.7b15601

Relating Structure to Efficiency in Surfactant-Free Polymer/Fullerene Nanoparticle-Based Organic Solar Cells [in press]

Gärtner, Stefan; Clulow, Andrew J.; Howard, Ian A.; Gilbert, Elliot P.; Burn, Paul L.; Gentle, Ian R.; Colsmann, Alexander

Abstract (englisch):
Nanoparticle dispersions open up an ecofriendly route toward printable organic solar cells. They can be formed from a variety of organic semiconductors by using miniemulsions that employ surfactants to stabilize the nanoparticles in dispersion and to prevent aggregation. However, whenever surfactant-based nanoparticle dispersions have been used to fabricate solar cells, the reported performances remain moderate. In contrast, solar cells from nanoparticle dispersions formed by precipitation (without surfactants) can exhibit power conversion efficiencies close to those of state-of-the-art solar cells processed from blend solutions using chlorinated solvents. In this work, we use small-angle neutron scattering measurements and transient absorption spectroscopy to investigate why surfactant-free nanoparticles give rise to efficient organic solar cells. We show that surfactant-free nanoparticles comprise a uniform distribution of small semiconductor domains, similar to that of bulk-heterojunction films formed using traditional solvent processing. This observation differs from surfactant-based miniemulsion nanoparticles that typically exh ... mehr

Zugehörige Institution(en) am KIT Institut für Mikrostrukturtechnik (IMT)
Lichttechnisches Institut (LTI)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator ISSN: 1944-8244, 1944-8252
KITopen ID: 1000077150
HGF-Programm 43.23.04; LK 01
Erschienen in ACS applied materials & interfaces
Seiten acsami.7b15601
Bemerkung zur Veröffentlichung
Schlagworte organic nanoparticle; polymer solar cell; printed electronics; small-angle neutron scattering; transient absorption spectroscopy
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft KITopen Landing Page