Novel Organic Superbase Dopants for Ultraefficient N-Doping of Organic Semiconductors

Novel Organic Superbase Dopants for Ultraefficient N-Doping of Organic Semiconductors

© 2023 Wiley-VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 35(2023), 22 vom: 17. Juni, Seite e2300084
1. Verfasser: Wei, Huan (VerfasserIn)
Weitere Verfasser: Cheng, Zehong, Wu, Tong, Liu, Yu, Guo, Jing, Chen, Ping-An, Xia, Jiangnan, Xie, Haihong, Qiu, Xincan, Liu, Tingting, Zhang, Bohan, Hui, Jingshu, Zeng, Zebing, Bai, Yugang, Hu, Yuanyuan
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2023
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article doping efficiency doping mechanism n-dopants organic semiconductors organic superbases
Beschreibung
Zusammenfassung:© 2023 Wiley-VCH GmbH.
Doping is a powerful technique for engineering the electrical properties of organic semiconductors (OSCs), yet efficient n-doping of OSCs remains a central challenge. Herein, the discovery of two organic superbase dopants, namely P2-t-Bu and P4-t-Bu as ultra-efficient n-dopants for OSCs is reported. Typical n-type semiconductors such as N2200 and PC61 BM are shown to experience a significant increase of conductivity upon doping by the two dopants. In particular, the optimized electrical conductivity of P2-t-Bu-doped PC61 BM reaches a record-high value of 2.64 S cm-1 . The polaron generation efficiency of P2-t-Bu-doped in PC61 BM is found to be over 35%, which is 2-3 times higher than that of benchmark n-dopant N-DMBI. In addition, a deprotonation-initiated, nucleophilic-attack-based n-doping mechanism is proposed for the organic superbases, which involves the deprotonation of OSC molecules, the nucleophilic attack of the resulting carbanions on the OSC's π-bonds, and the subsequent n-doping through single electron transfer process between the anionized and neutral OSCs. This work highlights organic superbases as promising n-dopants for OSCs and opens up opportunities to explore and develop highly efficient n-dopants
Beschreibung:Date Completed 01.06.2023
Date Revised 01.06.2023
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.202300084