Thiol Carbazole Self-Assembled Monolayers as Tunable Carrier Injecting Interlayers for Organic Transistors and Complementary Circuits

Bibliographische Detailangaben
Veröffentlicht in:	Advanced materials (Deerfield Beach, Fla.). - 1998. - (2024) vom: 10. Dez., Seite e2413157
1. Verfasser:	Nugraha, Mohamad Insan (VerfasserIn)
Weitere Verfasser:	Yang, Yu-Ying, Liu, Zhongzhe, Harrison, George T, Ardhi, Ryanda Enggar Anugrah, Firdaus, Yuliar, He, Qiao, Luo, Linqu, Hedhili, Mohamed Nejib, Thaler, Marco, Ling, Zhaoheng, Zeilerbauer, Matthias, Patera, Laerte L, Tsetseris, Leonidas, Fatayer, Shadi, Heeney, Martin, Anthopoulos, Thomas D
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2024
Zugriff auf das übergeordnete Werk:	Advanced materials (Deerfield Beach, Fla.)
Schlagworte:	Journal Article organic thin‐film transistors self‐assembled monolayers thiol carbazoles work function tuning

Beschreibung
Zusammenfassung:	© 2024 The Author(s). Advanced Materials published by Wiley‐VCH GmbH. The significant contact resistance at the metal-semiconductor interface is a well-documented issue for organic thin-film transistors (OTFTs) that hinders device and circuit performance. Here, this issue is tackled by developing three new thiol carbazole-based self-assembled monolayer (SAM) molecules, namely tBu-2SCz, 2SCz, and Br-2SCz, and utilizing them as carrier-selective injection interlayers. The SAMs alter the work function of gold electrodes by more than 1 eV, making them suitable for use in hole and electron-transporting OTFTs. Scanning tunneling microscopy analysis indicates that 2SCz and Br-2SCz form highly ordered molecular rows, resulting in work function values of 4.86 and 5.48 eV, respectively. The latter value is higher than gold electrodes modified by the commonly used pentafluorobenzenethiol (≈5.33 eV), making Br-2SCz promising for hole injection. Conversely, tBu-2SCz appears disordered with a lower work function of 4.52 eV, making it more suitable for electron injection. These intriguing properties are leveraged to demonstrate hole- and electron-transporting OTFTs with improved operating characteristics. All-organic complementary inverters are finally demonstrated by integrating p- and n-channel OTFTs, showcasing the potential of this simple yet powerful contact work function engineering approach. The present study highlights the versatility of thiol carbazole SAMs as carrier injecting interlayers for OTFTs and integrated circuits
Beschreibung:	Date Revised 11.12.2024 published: Print-Electronic Citation Status Publisher
ISSN:	1521-4095
DOI:	10.1002/adma.202413157