Polymerization of solid C60 under C 60 + cluster ion bombardment

Lavrentiev, V.; Vacı́k, J.; Naramoto, H.; Narumi, K.

doi:10.1007/s00339-009-5088-3

Cited by 4 publications

(1 citation statement)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The C 60 cluster ions are more appropriate projectiles than gas cluster ions for the controllable creation of surface nanostructures due to their perfect shape, uniform size, and energy in the ion beam. 9 The similarity of the C 60 projectiles in the incident ion beam implies the formation of identically modified local volumes following the cluster impacts, suggesting an indispensable method for the creation of nanodots. To identify the functions of the modified Si surface, we have studied the optical properties of the CIB-treated Si through measurements of the photoluminescence and optical absorption spectra.…”

Section: Introductionmentioning

confidence: 99%

Functionalization of Silicon Crystal Surface by Energetic Cluster Ion Bombardment

Lavrentiev

Vacı́k²,

Dejneka³

et al. 2012

j nanosci nanotechnol

Self Cite

View full text Add to dashboard Cite

We report the creation of a functional nanostructure on a Si crystal surface by 200 keV C60(++) cluster ion bombardment (CIB). We found that the modified layer produced by CIB includes two sublayers with different nanostructures. The top 24-nm-thick sublayer is an agglomeration of 5-nm-sized amorphous Si nanodots (a-Si NDs). The deeper 10-nm-thick sublayer is a transient layer of disordered Si as an interface between the a-Si top sublayer and the bulk Si(100). The top a-Si sublayer and the nc-Si transient layer are formed by the local heating effect and shock wave effect, respectively, induced by the cluster ion impacts. The photoluminescence (PL) spectra of the CIB-modified Si samples revealed an emission line centered at a photon energy of 1.92 eV. The absorption spectra of the modified samples exhibit enhanced light absorption at this photon energy. The parameters of the PL line require ascribing the emission origin to the quantum-confinement-induced optical transitions in the a-Si nanodots. The core-shell structure of a-Si NDs is confirmed by detection of an additional PL line centered at 2.5 eV. Analysis of the Rutherford backscattering (RBS) and the PL spectra implies the existence of -Si--O- bonds in the nanodot outer shells, which are responsible for the additional PL line. The obtained results demonstrate the valuable potential of CIB for the controllable fabrication of Si surface nanostructures, which is attractive for optoelectronics and nanoelectronics. The obtained results elucidate the evolution of structure modification occurring in silicon due to the injection of energetic C60 cluster ions with an energy of hundreds of keV.

show abstract

Section: Introductionmentioning

confidence: 99%

Functionalization of Silicon Crystal Surface by Energetic Cluster Ion Bombardment

Lavrentiev

Vacı́k²,

Dejneka³

et al. 2012

j nanosci nanotechnol

Self Cite

View full text Add to dashboard Cite

show abstract

Controllable fabrication of amorphous Si layer by energetic cluster ion bombardment

Lavrentiev

Vorlı́ček

Dejneka

et al. 2013

Vacuum

View full text Add to dashboard Cite

Controlled Redox of Lithium-Ion Endohedral Fullerene for Efficient and Stable Metal Electrode-Free Perovskite Solar Cells

et al. 2019

View full text Add to dashboard Cite

High efficiency perovskite solar cells have underpinned the rapid growth of the field. However, their low device stability limits further advancement. Hygroscopic lithium bis(trifluoromethanesulfonyl)imide (Li + TFSI − ) and metal electrode are the main causes of the device instability. In this work, the redox reaction between lithium-ion endohedral fullerenes and 2,2′,7,7′tetrakis(N,N-di-p-methoxyphenylamine)-9,9′-spirobi-fluorene (spiro-MeOTAD) was controlled to optimize the amount of oxidized spiro-MeOTAD and antioxidizing neutral endohedral fullerenes. Application of this mixture to metal-free carbon nanotube (CNT)-laminated perovskite solar cells resulted in 17.2% efficiency with a stability time of more than 1100 h under severe conditions (temperature = 60 °C, humidity = 70%). Such high performance is attributed to the uninhibited charge flow, no metal-ion migration, and the enhanced antioxidizing activity of the devices.

show abstract

Polymerization of solid C60 under C 60 + cluster ion bombardment

Cited by 4 publications

References 36 publications

Functionalization of Silicon Crystal Surface by Energetic Cluster Ion Bombardment

Functionalization of Silicon Crystal Surface by Energetic Cluster Ion Bombardment

Controllable fabrication of amorphous Si layer by energetic cluster ion bombardment

Controlled Redox of Lithium-Ion Endohedral Fullerene for Efficient and Stable Metal Electrode-Free Perovskite Solar Cells

Contact Info

Product

Resources

About