Field-induced modification of the electronic structure in BTBT-based organic thin films observed by NEXAFS spectroscopy

Johnson M, Hawly T, Zhao B, Halik M, Nefedov A, Fink R (2022)


Publication Type: Journal article

Publication year: 2022

Journal

Book Volume: 121

Journal Issue: 18

DOI: 10.1063/5.0105893

Abstract

We present an in operando near-edge x-ray absorption fine structure (NEXAFS) study on p-type [11-(benzo[b]benzo[4,5]thieno[2,3-d]thiophen-2-yl)dodecyl)] BTBT-based self-assembled monolayer (BTBT-SAM) films. As a 2D-model system, the BTBT-SAM offers direct insight into the active organic semiconductor layer without interfering bulk materials. This allows for the observation of polaronic states caused by charged species at the dielectric/organic interface. Linear NEXAFS dichroism is employed to derive the molecular orientation of the BTBT subunit. Field-induced modifications in the unoccupied molecular orbitals are observed in the NEXAFS spectra. The spectral changes in the on- and off-states are discussed in the context of polaron formation due to charge accumulation induced by the applied electric field. Published under an exclusive license by AIP Publishing.

Authors with CRIS profile

Involved external institutions

How to cite

APA:

Johnson, M., Hawly, T., Zhao, B., Halik, M., Nefedov, A., & Fink, R. (2022). Field-induced modification of the electronic structure in BTBT-based organic thin films observed by NEXAFS spectroscopy. Applied Physics Letters, 121(18). https://doi.org/10.1063/5.0105893

MLA:

Johnson, Manuel, et al. "Field-induced modification of the electronic structure in BTBT-based organic thin films observed by NEXAFS spectroscopy." Applied Physics Letters 121.18 (2022).

BibTeX: Download