Real-time monitoring of the evolving morphology and molecular structure at an organic-inorganic semiconductor interface: SnPc on GaAs(001) - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Vacuum Science & Technology B Microelectronics and Nanometer Structures Année : 2010

Real-time monitoring of the evolving morphology and molecular structure at an organic-inorganic semiconductor interface: SnPc on GaAs(001)

D. A. A Evans
  • Fonction : Auteur
A. R. R Vearey-Roberts
  • Fonction : Auteur
O. R. R Roberts
  • Fonction : Auteur
A. C. C Brieva
  • Fonction : Auteur
A. Bushell
  • Fonction : Auteur
G. T. T Williams
  • Fonction : Auteur
D. P. P Langstaff
  • Fonction : Auteur
Gregory Cabailh
I. T. T Mcgovern
  • Fonction : Auteur

Résumé

An organic-III-V hybrid semiconductor interface has been studied using real-time photoelectron spectroscopy and x-ray absorption spectroscopy to reveal the evolving morphology and molecular structure within the organic layer during thin film growth. This new approach to in situ characterization has been enabled by electron detection using a direct electron-counting array detector coupled to a hemispherical electron analyzer. The nonplanar tin phthalocyanine (SnPc) molecules initially form a uniform layer within which they have a distinct molecular orientation relative to the S-passivated gallium arsenide substrate surface [GaAs:S(001)]. The critical thickness of 0.9 nm that marks the transition between layered and clustered growth, determined from the photoemission measurements, corresponds to a single molecular layer with the molecules oriented at an angle of (39 +/- 2)degrees to the substrate plane. This value is confirmed by angle-resolved near-edge x-ray absorption fine structure measurements in the same experimental environment. However, the angle is less for the thicker films as the molecule-molecule interaction dominates over the molecule-substrate interaction and the structure is close to that of the bulk triclinic SnPc crystal.
Fichier principal
Vignette du fichier
evans2010.pdf (286.35 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-01241551 , version 1 (10-04-2020)

Licence

Paternité

Identifiants

Citer

D. A. A Evans, A. R. R Vearey-Roberts, O. R. R Roberts, A. C. C Brieva, A. Bushell, et al.. Real-time monitoring of the evolving morphology and molecular structure at an organic-inorganic semiconductor interface: SnPc on GaAs(001). Journal of Vacuum Science & Technology B Microelectronics and Nanometer Structures, 2010, 28 (4), pp.5-11. ⟨10.1116/1.3464769⟩. ⟨hal-01241551⟩
49 Consultations
83 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More