Journal Article

PUBDB-2024-05242

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Ambient stable solution-processed organic field effect transistors from electron deficient planar aromatics: effect of end-groups on ambient stability

Giri, I.Extern* ; Biswas, S. ; Chhetri, S.Extern* ; Choudhuri, A. ; Mondal, I. ; Senanayak, S. P. ; Iyer, P. K. (Corresponding author) ; Chaudhuri, D. ; Vijayaraghavan, R. (Corresponding author)Extern*

2024
RSC Publishing London

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Please use a persistent id in citations: doi:10.1039/D4RA01499E  doi:10.3204/PUBDB-2024-05242

Abstract: Ambient stable solution processed n-channel organic field effect transistors (OFETs) are essential for next-generation low-cost organic electronic devices. Several molecular features, such as suitable orbital energy levels, easy synthetic steps, etc., must be considered while designing efficient active layer materials. Here, we report a case of improved ambient stability of solution-processed n-type OFETs upon suitable end-groups substitution of the active layer materials. A pair of core-substituted napthalenediimide (NDIFCN2 and EHNDICN2) derivatives with alkyl and perfluorinated end groups are considered. The transistor devices made out of these two derivatives exhibited largely different ambient stability behavior. The superior device stability (more than 25 days under ambient conditions) of one of the derivatives (NDIFCN2) was ascribed to the presence of fluorinated end groups that function as hydrophobic guard units inhibiting moisture infiltration into the active layer, thereby achieving ambient stability under humid conditions (>65% relative atmospheric humidity). Molecular level optical and electrochemical properties, thermal stability, and the solution-processed (spin coat and drop cast active layers) device characteristics are described in detail. Our findings highlight the requirement of hydrophobic end groups or sidechains for ambient stability of active layer materials, along with deep LUMO levels for ambient stability.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. INDIA-DESY - INDIA-DESY Collaboration (2020_Join2-INDIA-DESY) (2020_Join2-INDIA-DESY)
3. FS-Proposal: I-20221013 (I-20221013) (I-20221013)
4. FS-Proposal: I-20211469 (I-20211469) (I-20211469)

Experiment(s):

1. PETRA Beamline P08 (PETRA III)

Appears in the scientific report 2024

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Database coverage:
; ; ; ; Article Processing Charges ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; Essential Science Indicators ; Fees ; IF < 5 ; JCR ; National-Konsortium ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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