Interface and composition analysis on perovskite solar cells
di, Carlo Aldo
ACS Applied Materials & Interfaces
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Matteocci, F., Busby, Y., Pireaux, J., Divitini, G., Cacovich, S., Ducati, C., & di, C. A. (2015). Interface and composition analysis on perovskite solar cells. ACS Applied Materials & Interfaces, 7 26176-26183. https://doi.org/10.1021/acsami.5b08038
Organometal halide (hybrid) perovskite solar cells have been fabricated following four different deposition procedures and investigated in order to find correlations between the solar cell characteristics/performance and their structure and composition as determined by combining depth-resolved imaging with time-of-flight secondary ion mass spectrometry (ToF-SIMS), X-Ray photoelectron spectroscopy (XPS) and analytical scanning transmission electron microscopy (STEM). The interface quality is found to be strongly affected by the perovskite conversion methodology and in particular from the environment where the conversion is performed (air, nitrogen or vacuum). The conversion rate of the precursors into the hybrid perovskite is compared between the different solar cells by looking at the ToF-SIMS intensities of the characteristic molecular fragments from the perovskite and the precursor materials. Energy dispersive X-ray spectroscopy in the STEM confirms the macroscopic ToF-SIMS findings and allows elemental mapping with nanometer resolution. A clear evidence for iodine diffusion has been observed and related to the fabrication procedure.
Perovskite solar cells, ToF-SIMS, XPS, EDX-STEM, Filaments
We acknowledge Lucio Cinà, Simone Casaluci, Stefano Razza and Narges Yaghoobi Nia for the technical support, “Polo Solare Organico” Regione Lazio, the “DSSCX” MIUR-PRIN2010 and FP7 ITN “Destiny” for funds. G.D., S.C. and C.D. acknowledge funding from ERC under grant number 259619 PHOTO EM. C.D. acknowledges financial support from the EU under grant number 312483 ESTEEM2.
European Research Council (259619)
EC FP7 CP WITH CSA (312483)
External DOI: https://doi.org/10.1021/acsami.5b08038
This record's URL: https://www.repository.cam.ac.uk/handle/1810/252530
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