Role of intrinsic molecular dipole in energy level alignment at organic interfaces | Zendy

Linda Lindell | Zendy; Deniz Çakır | Zendy; Geert Brocks | Zendy; Mats Fahlman | Zendy; Slawomir Braun | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

Role of intrinsic molecular dipole in energy level alignment at organic interfaces

Author(s) -

Linda Lindell,

Deniz Çakır,

Geert Brocks,

Mats Fahlman,

Slawomir Braun

Publication year - 2013

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4809567

Subject(s) - vacuum level , dipole , bilayer , fermi level , charge (physics) , organic semiconductor , chemical physics , molecule , homo/lumo , materials science , condensed matter physics , chemistry , molecular physics , optoelectronics , physics , electron , membrane , biochemistry , organic chemistry , quantum mechanics

The energy level alignment in metal-organic and organic-organic junctions of the widely used materials tris-(8-hydroxyquinoline)aluminum (Alq3) and 1,4,5,8-naphthalenetetracarboxylic dianhydride (NTCDA) is investigated. The measured alignment schemes for single and bilayer films of Alq3 and NTCDA are interpreted with the integer charge transfer (ICT) model. Single layer films of Alq3 feature a constant vacuum level shift of ∼0.2–0.4 eV in the absence of charge transfer across the interface. This finding is attributed to the intrinsic dipole of the Alq3 molecule and (partial) ordering of the molecules at the interfaces. The vacuum level shift changes the onset of Fermi level pinning, as it changes the energy needed for equilibrium charge transfer across the interface

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research