Publication detail

Tunable Energy-Level Alignment in Multilayers of Carboxylic Acids on Silver

STARÁ, V. PROCHÁZKA, P. PLANER, J. SHAHSAVAR, A. MAKOVEEV, A. SKÁLA, T. BLATNIK, M. ČECHAL, J.

Original Title

Tunable Energy-Level Alignment in Multilayers of Carboxylic Acids on Silver

Type

journal article in Web of Science

Language

English

Original Abstract

Precise energy-level alignment between a metal electrode and an organic semiconductor is required to reduce contact resistance and enhance the efficiency of organic-semiconductor-based devices. Here, we introduce monolayer-thick charge-injection layers (CILs) based on aromatic carboxylic acids that can induce an energy-level shift in subsequent layers by up to 0.8 eV. Through a gradual chemical transformation of the as-deposited molecules, we achieve a highly tunable energy-level shift in the range of 0.5 eV. We reveal that the work function and energy-level positions in the CIL increase linearly with the density of induced dipoles. The energy-level position of subsequent layers follows the changes in the CIL. Our results thus connect the energy-alignment quantities, and the high tunability would allow precise tuning of the active layers deposited on the CIL, which marks a path towards efficient charge-injection layers on metal electrodes.

Keywords

Alignment; Carboxylic acids; Semiconductor devices; Silver

Authors

STARÁ, V.; PROCHÁZKA, P.; PLANER, J.; SHAHSAVAR, A.; MAKOVEEV, A.; SKÁLA, T.; BLATNIK, M.; ČECHAL, J.

Released

1. 10. 2022

ISBN

2331-7019

Periodical

Physical Review Applied

Year of study

18

Number

4

State

United States of America

Pages count

13

URL

https://doi.org/10.1103/PhysRevApplied.18.044048

BibTex

@article{BUT182710,
  author="Veronika {Stará} and Pavel {Procházka} and Jakub {Planer} and Azin {Trllová Shahsavar} and Anton Olegovich {Makoveev} and Tomáš {Skála} and Matthias {Blatnik} and Jan {Čechal}",
  title="Tunable Energy-Level Alignment in Multilayers of Carboxylic Acids on Silver",
  journal="Physical Review Applied",
  year="2022",
  volume="18",
  number="4",
  pages="13",
  doi="10.1103/PhysRevApplied.18.044048",
  issn="2331-7019",
  url="https://doi.org/10.1103/PhysRevApplied.18.044048"
}