| 研究生: |
鍾佳學 Chung, Chia-Hsueh |
|---|---|
| 論文名稱: |
隨機共聚策略對本質可拉伸與部分可降解之 N 型半導體在有機場效應電晶體性能之影響 Random Copolymer Strategy on the Performance of Intrinsically Stretchable and Partially Degradable N-Type Semiconductors for Organic Field-Effect Transistors |
| 指導教授: |
林彥丞
Lin, Yan-Cheng |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 化學工程學系 Department of Chemical Engineering |
| 論文出版年: | 2025 |
| 畢業學年度: | 113 |
| 語文別: | 英文 |
| 論文頁數: | 160 |
| 中文關鍵詞: | 隨機共聚物 、可降解性 、可拉伸性 、n 型半導體 、共軛高分子 |
| 外文關鍵詞: | Random copolymer, Degradability, Stretchability, n-type semiconductors, Conjugated polymer |
| 相關次數: | 點閱:8 下載:1 |
| 分享至: |
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本研究中合成了一系列共軛高分子,包括兩種均聚物(P1 和 P5)與三種隨機共聚物(P2–P4),以萘二酰亞胺(NDI)作為受體單元,並搭配兩種給體單元──噻吩–亞胺–噻吩(TIT)與噻吩–乙烯基–噻吩(TVT)──進行不同比例的共聚。TIT 的引入使高分子主鏈中包含對酸敏感的亞胺鍵,賦予材料在酸性條件下的部分可降解性,呼應永續電子材料的發展需求。結構分析顯示,TIT 有助於形成 edge-on 分子取向,而 TVT 則促進 face-on 與末端對末端(end-to-end)堆疊。紫外可見光吸收光譜(UV-vis)分析進一步指出,TVT 含量越高,聚集特徵越明顯,反映出更有序的堆疊行為。P3 的吸收紅移與聚集程度介於 P1 與 P5 之間,顯示其具中等聚集能力,有助於在電荷傳輸與機械穩定性間取得平衡。酸降解實驗亦驗證其可解聚性,P3 於酸性環境下經 48 小時降解率達30.4%,展現材料潛在的可降解特性。透過隨機共聚方式調控給體單元比例,有效調整高分子的固態堆疊行為,並平衡其電子與機械性質。其中,TIT 與 TVT 等莫耳比例的 P3 表現出適度的可拉伸性,且在應變下維持穩定的電荷遷移率。具體而言,P3 初始遷移率為 0.10 cm² V⁻¹ s⁻¹,在 20% 應變下仍保有 0.0017 cm² V⁻¹ s⁻¹ 的遷移率,對應的遷移率保持率為 31.3%,顯著高於 P5 的 12.2%。本研究顯示 TIT/TVT 隨機共聚策略可望整合電荷傳輸性、機械穩定性與可降解性,為發展環境友善之可撓性 n 型半導體材料提供具潛力的設計方向。
In this study, a series of conjugated polymers—two homopolymers (P1 and P5) and three random copolymers (P2–P4)—were synthesized using naphthalene diimide (NDI) as the acceptor and varying ratios of two donor units: thiophene–imine–thiophene (TIT) and thiophene–vinylene–thiophene (TVT). The incorporation of TIT introduced acid-labile imine bonds into the backbone, enabling partial degradability under acidic conditions and addressing the demand for sustainable electronics. Structural analyses showed that TIT favored edge-on orientation, while TVT promoted face-on and end-to-end stacking. UV–vis spectroscopy revealed that increasing TVT content enhanced aggregation features, indicating more ordered packing. P3, with a balanced TIT/TVT ratio, exhibited intermediate redshift and shoulder peak characteristics between P1 and P5, suggesting moderate aggregation that supports a trade-off between charge transport and mechanical stability. Acid degradation tests confirmed the depolymerization ability of P3, which showed 30.4% degradation after 48 hours in acidic conditions. Random copolymerization effectively modulated solid-state packing and the balance of electronic and mechanical properties. Among the series, P3 demonstrated moderate stretchability and stable mobility under strain, with an initial mobility of 0.10 cm² V⁻¹ s⁻¹ and 0.0017 cm² V⁻¹ s⁻¹ at 20% strain, corresponding to a retention of 31.3%, significantly higher than P5’s 12.2%. These results highlight the potential of the TIT/TVT-based random copolymer strategy to integrate charge transport, mechanical robustness, and degradability for flexible, eco-friendly n-type semiconductors.
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