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• W2977876181 endingPage "40357" @default.
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• W2977876181 abstract "A family of copolymers (P(NDIOD-T2Fx)) based on naphthalenediimide (NDI) and 2,2′-bithiophene (T2) units with different amounts of 3,3′-difluoro-2,2′-bithiophene (T2F) decoration were synthesized, characterized, and used in n-type organic field-effect transistors (OFETs). With increasing T2F content in the backbone, we observe increased melting and crystallization transitions, blue-shifted absorptions, and deeper-lying highest occupied molecular orbital (HOMO)/lowest unoccupied molecular orbital (LUMO) levels, together with improved hydrophobicity. The highest electron mobility of 4.48 × 10–1 cm2 V–1 s–1 was obtained for P(NDIOD-T2F0) without a T2F unit, which is attributed to the larger domain grains and crystallites, as well as a more tightly packed and oriented crystalline structure, as evidenced from the morphological study. In contrast, P(NDIOD-T2F100) with the highest T2F content has superior air stability, showing greater than 25% electron mobility retention after 30 days in wet conditions of 100% relative humidity without encapsulation. Even P(NDIOD-T2F100) is able to operate normally after 30 min of immersion in water, which is due to the synergistic contributions from the deep HOMO/LUMO levels and improved hydrophobicity. This study advances our fundamental understanding of how the morphology/crystallinity, device performance, and device stability of n-type copolymers are tuned by incorporating different concentrations of T2F in the backbone, shedding light on an important modification for air- and water-stable n-type materials for future OFET applications." @default.
• W2977876181 created "2019-10-10" @default.
• W2977876181 creator A5006874417 @default.
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• W2977876181 date "2019-10-02" @default.
• W2977876181 modified "2023-10-16" @default.
• W2977876181 title "Understanding of Fluorination Dependence on Electron Mobility and Stability of Naphthalenediimide-Based Polymer Transistors in Environment with 100% Relative Humidity" @default.
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• W2977876181 doi "https://doi.org/10.1021/acsami.9b14942" @default.
• W2977876181 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31576742" @default.
• W2977876181 hasPublicationYear "2019" @default.
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