Impact of packing arrangement on the optical properties of C60 cluster aggregates

Muhammed, Mufasila Mumthaz; Mokkath, Junais Habeeb; Chamkha, Ali J.

doi:10.1039/d1cp04128b

Cited by 3 publications

(1 citation statement)

References 71 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In particular, C 60 shows a series of optical absorption features in multilayer and other aggregated structures 23 , where different spectroscopy studies have indicated that these optical transitions correspond to the formation of excitons with differing charge-transfer character 24 – 28 . Although these indirect results are supported by time-dependent density functional theory calculations 29 – 31 , quantitative access to the multiorbital wavefunction contributions (see Eq. ( 1 ) and Fig.…”

Section: Resultsmentioning

confidence: 99%

Disentangling the multiorbital contributions of excitons by photoemission exciton tomography

Bennecke,

Windischbacher,

Schmitt

et al. 2024

Nat Commun

View full text Add to dashboard Cite

Excitons are realizations of a correlated many-particle wave function, specifically consisting of electrons and holes in an entangled state. Excitons occur widely in semiconductors and are dominant excitations in semiconducting organic and low-dimensional quantum materials. To efficiently harness the strong optical response and high tuneability of excitons in optoelectronics and in energy-transformation processes, access to the full wavefunction of the entangled state is critical, but has so far not been feasible. Here, we show how time-resolved photoemission momentum microscopy can be used to gain access to the entangled wavefunction and to unravel the exciton’s multiorbital electron and hole contributions. For the prototypical organic semiconductor buckminsterfullerene (C60), we exemplify the capabilities of exciton tomography and achieve unprecedented access to key properties of the entangled exciton state including localization, charge-transfer character, and ultrafast exciton formation and relaxation dynamics.

show abstract