TY - JOUR

T1 - Fluorination of single-walled carbon nanotubes and their application in organic photovoltaic cells as an electron acceptor

AU - Kobeleva, E. S.

AU - Nevostruev, D. A.

AU - Uvarov, M. N.

AU - Utkin, D. E.

AU - Zinoviev, V. A.

AU - Gurova, O. A.

AU - Kazantzev, M. S.

AU - Degtyarenko, K. M.

AU - Kulikova, A. V.

AU - Kulik, L. V.

N1 - Funding Information: This work was funded by the Russian Foundation for Basic Research (RFBR) and Novosibirsk Region (Project No. 20-43-540025). This research was financially supported by the RFBR (Project No. 18-29-19089mk) and in accordance with the state assignment of V. V. Voevodsky Institute of Chemical Kinetics and Combustion of the Siberian Branch of the Russian Academy of Sciences (No. AAAA-A21-121011390038-1). Publisher Copyright: © 2021, Springer Science+Business Media LLC.

PY - 2021/12

Y1 - 2021/12

N2 - A technique for increasing the degree of dispergation of TUBALL (OCSiAl) single-walled carbon nanotubes (SWCNTs) and for obtaining individual nanotubes was developed. A combination of steps including preliminary purification of the starting SWCNTs from residues of iron-containing catalyst, ultrasonic dispergation of SWCNTs, chemical shortening of SWCNTs, mild fluorination of SWCNTs in BrF3 vapors, centrifugation of a dispersion of SWCNTs in o-dichlorobenzene, and isolation of individual SWCNTs during supernatant filtration was used. This procedure led to a decrease in the average length of SWCNTs and a noticeable decrease in the diameter of their bundles. A considerable portion of a dispersion of SWCNTs separated in this manner consisted of individual nanotubes with diameters of 1–2 nm, in addition, there were bundles with diameters of up to 6 nm. This technique made it possible to obtain photovoltaic cells based on a composite of a conjugated polymer of poly-3-hexylthiophene (P3HT) and fluorinated SWCNTs with a reproducible photovoltaic effect. The energy of the boundary LUMO of fluorinated SWCNTs was determined to be equal to −4.3 eV by cyclic voltammetry. This is suitable for light-induced electron transfer from P3HT and most other donor polymers to fluorinated SWCNTs.

AB - A technique for increasing the degree of dispergation of TUBALL (OCSiAl) single-walled carbon nanotubes (SWCNTs) and for obtaining individual nanotubes was developed. A combination of steps including preliminary purification of the starting SWCNTs from residues of iron-containing catalyst, ultrasonic dispergation of SWCNTs, chemical shortening of SWCNTs, mild fluorination of SWCNTs in BrF3 vapors, centrifugation of a dispersion of SWCNTs in o-dichlorobenzene, and isolation of individual SWCNTs during supernatant filtration was used. This procedure led to a decrease in the average length of SWCNTs and a noticeable decrease in the diameter of their bundles. A considerable portion of a dispersion of SWCNTs separated in this manner consisted of individual nanotubes with diameters of 1–2 nm, in addition, there were bundles with diameters of up to 6 nm. This technique made it possible to obtain photovoltaic cells based on a composite of a conjugated polymer of poly-3-hexylthiophene (P3HT) and fluorinated SWCNTs with a reproducible photovoltaic effect. The energy of the boundary LUMO of fluorinated SWCNTs was determined to be equal to −4.3 eV by cyclic voltammetry. This is suitable for light-induced electron transfer from P3HT and most other donor polymers to fluorinated SWCNTs.

KW - carbon nanotubes

KW - composites

KW - conjugated polymers

KW - dispersion

KW - luminescence

KW - organic photovoltaics

UR - http://www.scopus.com/inward/record.url?scp=85123626892&partnerID=8YFLogxK

U2 - 10.1007/s11172-021-3363-4

DO - 10.1007/s11172-021-3363-4

M3 - Article

AN - SCOPUS:85123626892

VL - 70

SP - 2427

EP - 2433

JO - Russian Chemical Bulletin

JF - Russian Chemical Bulletin

SN - 1066-5285

IS - 12

ER -