Photoelectrochemical characterization of A{sub {ital x}}C{sub 60}(A=Li,K) thin films in a solid state cell

Journal Article · Mon Jul 01 04:00:00 EDT 1996 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.51188· OSTI ID:451089

Dalchiele, E A ^[1]; Rosolen, J M; Decker, F ^[2]

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1. Instituto de Fisica, Facultad de Ingenieria, C. C. 30, 11000 Montevideo (Uruguay)
2. Dipartimento di Chimica, Universita ``La Sapienza``, 00185 Roma (Italy)

Solid-state electrochemical cells have been prepared with C{sub 60} vacuum-evaporated thin films, a Li- or K-source counter electrode and a polymer PEO-LiClO{sub 4} (PEO-KCl) electrolyte. The electrochemical intercalation in C{sub 60} of Li{sup +} (or K{sup +}) ions has been performed under constant current conditions up to a formal stoichiometry of the fulleride film equal to Li{sub 12}C{sub 60} (K{sub 5}C{sub 60}). A complete charge-transfer process from the intercalated alkali to the alkali-metal compound has been assumed. Several quasi-equilibrium potential plateaux were observed during intercalation, that we associate with the coexistence of phases with different intercalant concentration. The electrochemical intercalation process is irreversible to a large extent. Photoelectrochemical spectroscopy of the fulleride films was done {open_quote}{open_quote}in-situ{close_quote}{close_quote} at different moments of the intercalation reaction by illuminating the film electrodes through the transparent and conducting glass substrates. The photoelectrochemical response shows a minimum for {ital x}=3 (in the K{sub {ital x}}C{sub 60} compound) and a maximum at {ital x}=4 (in both K{sub {ital x}}C{sub 60} and Li{sub {ital x}}C{sub 60} compounds), in agreement with previous conductivity results. {copyright} {ital 1996 American Institute of Physics.}

• OSTI ID: 451089
• Report Number(s): CONF-9409431--
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 378; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
36 MATERIALS SCIENCE
40 CHEMISTRY
ABSORPTION SPECTRA
DOPED MATERIALS
FULLERENES
LITHIUM ADDITIONS
NEAR INFRARED RADIATION
PERFORMANCE
PHOTOELECTROCHEMICAL CELLS
POTASSIUM ADDITIONS
THIN FILMS
ULTRAVIOLET RADIATION
VISIBLE RADIATION