Conjugated Phosphonic Acid Modified Zinc Oxide Electron Transport Layers for Improved Performance in Organic Solar Cells

Autor:	Unsal Koldemir, Thomas E. Furtak, Alan Sellinger, Dana C. Olson, Jennifer L. Braid, Reuben T. Collins
Rok vydání:	2014
Předmět:	Kelvin probe force microscope Improved performance Organic solar cell Chemistry Inorganic chemistry Energy conversion efficiency chemistry.chemical_element General Materials Science Work function Zinc Conjugated system Electron transport chain Nuclear chemistry
Zdroj:	ACS Applied Materials & Interfaces. 6:19229-19234
ISSN:	1944-8252 1944-8244
DOI:	10.1021/am505182c
Popis:	Phosphonic acid modification of zinc oxide (ZnO) electron transport layers in inverted P3HT:ICBA solar cells was studied to determine the effect of conjugated linkages between the aromatic and phosphonic acid attachment groups. For example, zinc oxide treated with 2,6-difluorophenylvinylphosphonic acid, having a conjugated vinyl group connecting the aromatic moiety to the phosphonic acid group, showed a 0.78 eV decrease in the effective work function versus unmodified ZnO, whereas nonconjugated 2,6-difluorophenylethylphosphonic acid resulted in a 0.57 eV decrease, as measured by Kelvin probe. This resulted in an average power conversion efficiency of 5.89% for conjugated 2,6-difluorophenyvinylphosphonic acid modified solar cells, an improvement over unmodified (5.24%) and nonconjugated phosphonic acid modified devices (5.64%), indicating the importance of the conjugated linkage.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0fcc5b6af1d7aa5d4471e09457ca58ec https://doi.org/10.1021/am505182c Zobrazit plný text záznamu