An X-ray fluorescence study on the segregation of Cs and I in an inverted organic solar cell

TitleAn X-ray fluorescence study on the segregation of Cs and I in an inverted organic solar cell
Publication TypeJournal Article
Year of Publication2013
AuthorsLindemann WR, Xiao T, Wang WJ, Berry JE, Anderson NA, Houk RS, Shinar R, Shinar J, Vaknin D
Journal TitleOrganic Electronics
Volume14
Pages3190-3194
Date Published12
Type of ArticleArticle
ISBN Number1566-1199
Accession NumberWOS:000327146500007
KeywordsCsI Interlayer, Inductively coupled plasma mass, Inverted organic solar cells, laser ablation, spectrometry, X-ray fluorescence
Abstract

X-ray near-total-reflection fluorescence reveals that in multilayers of the inverted organic solar cell (ITO/CsI/P3HT:PCBM-based) Cs diffuses into the organic layer and iodide diffuses into the ITO. Laser ablation inductively coupled plasma mass spectrometry measurements, which integrate elemental concentration across the whole multilayer structure, indicate that the Cs:I ratio remains 1:1 confirming there is no loss of iodine from the sample. Iodide diffusion to the bulk ITO layer is also found in a similarly prepared ITO/NaI/P3HT:PCBM multilayer structure. Our results are consistent with recent XPS measurements which show that the Cs:I ratio at the ITO/CsI surface exceeds 8:1, and rationalize this observation. Published by Elsevier B. V.

URL<Go to ISI>://WOS:000327146500007
DOI10.1016/j.orgel.2013.09.019