Fullerene C₇₀/porphyrin hybrid nanoarchitectures: single-cocrystal nanoribbons with ambipolar charge transport properties

Abstract

The one-dimensional porphyrin chains in the cocrystal play a very important role in the hole transport properties of C70/porphyrin nanoribbons.

Ambipolar to Unipolar Conversion in C70/Ferrocene Nanosheet Field-Effect Transistors

“…This result also indicates the fact that the C70/Fc nanosheets were more thermally stable than the C60/Fc nanosheets. Figure 4a illustrates the PYSA spectra of the C70/Fc nanosheets and C70 powder [38]. The Is of the C70/Fc nanosheets was determined to be 5.61 eV, which was 0.6 eV lower than that of the C70 powder.…”

“…In this study, we conducted PYSA measurements on the C 70 /Fc cocrystals, Fc, and C 70 powder. PYSA is an effective method for exploring the electronic and electrical characteristics of molecular semiconductors [38,49]. In a previous study, we successfully utilized PYSA to evaluate the electronic structure of the C 60 /Fc nanosheets with high sensitivity [39].…”

“…These energy level diagrams reveal that the co- The I s of the C 70 /Fc nanosheets was determined to be 5.61 eV, which was 0.6 eV lower than that of the C 70 powder. Figure 4b presents the energy level diagrams of the C 60 /Fc nanosheets [39], Fc [39], C 70 /Fc nanosheets, and C 70 powder [38], estimated using the measured I s and E g values . The E g of the C 70 /Fc nanosheets was derived from the UVvisible absorption spectrum obtained in this study.…”

“…Figure4aillustrates the PYSA spectra of the C 70 /Fc nanosheets and C 70 powder[38]. The I s of the C 70 /Fc nanosheets was determined to be 5.61 eV, which was 0.6 eV lower than that of the C 70 powder.…”

“…Hence, fabricating organic cocrystals provides a feasible means of obtaining ambipolar materials; nevertheless, the preparation of these semiconductors remains a challenge owing to complex organic syntheses. However, using a simple and efficient liquid-liquid interfacial precipitation method for the synthesis of low-dimensional nanomaterials based on fullerenes [33][34][35][36][37], our group has successfully synthesized cocrystals of fullerenes with ambipolar transport characteristics [1,38,39]. Recently, we successfully demonstrated the capability to irreversibly switch the electrical properties of C 60 /Fc nanosheets from ambipolar to unipolar by thermal stimulation [39].…”