| 研究生: |
甘宇哲 Kan, Yu-Che |
|---|---|
| 論文名稱: |
結構工程設計之 N 型共軛嵌段高分子於半導體型單壁奈米碳管分選及其電晶體元件應用 Architecture-Engineered N-Type Conjugated Block Copolymers for Sorting Semiconducting Single-Walled Carbon Nanotubes and Transistor Applications |
| 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: | 2026 |
| 畢業學年度: | 114 |
| 語文別: | 英文 |
| 論文頁數: | 169 |
| 中文關鍵詞: | 萘二醯亞胺 、共軛嵌段高分子 、單壁奈米碳管 、碳管分選 、電晶體應用 |
| 外文關鍵詞: | naphthalene diimide, conjugated block copolymers, single–walled carbon nanotubes, single–walled carbon nanotube sorting, transistor applications |
| 相關次數: | 點閱:51 下載:4 |
| 分享至: |
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單壁奈米碳管因其優異的電荷載子遷移率與本質機械柔韌性,被視為下一代柔性電子與光電元件中極具潛力的通道材料。然而,合成後的原始奈米碳管通常為金屬型與半導體型之混合物,如何高效分選出高純度的半導體型單壁奈米碳管仍是當前實務應用上的關鍵瓶頸。為解決此項挑戰,本研究提出了一種創新的高分子拓樸工程。透過將具備高柔韌性的聚異丁烯軟鏈段引入剛性的萘二醯亞胺–聯噻吩共軛主鏈中,成功合成出一系列多嵌段共聚高分子。在這些不同幾何構型的高分子中,獨特的三臂星狀分子爪拓樸架構(tAB 系列)被證實為最佳設計。此多方向的嵌段高分子能完美適應碳管的表面曲率,有效打破共軛主鏈的自身聚集效應,進而實現分選純度高達 99.9% 以上的超高純度 半導體型單壁奈米碳管。此外,該高分子/碳管複合材料在電子元件中展現出了卓越的多功能應用潛力。在光電晶體記憶體的應用上,具備較高軟鏈段比例的 tAB–2 複合薄膜展現出最優異的性能,其記憶體窗口可達到 80 V,且電流開關比高達 10^5,表現出極佳的電荷捕捉與保持能力。同時,在場效應拉伸元件的機械測試中,此分子爪拓樸高分子可作為奈米級交聯劑,有效抑制碳管間的不可逆滑移;實驗結果證實,該元件在承受高達 50% 的拉伸應變下,仍能維持 140% 的高載子遷移率保持率。本研究成功結合材料拓樸設計與元件工程,為開發兼具高性能與機電彈性的下一代多功能可拉伸光電系統提供了全新的路徑。
Single–walled carbon nanotubes are highly promising candidates for next–generation flexible electronics and optoelectronic devices due to their exceptional charge carrier mobility and intrinsic mechanical flexibility. However, as–synthesized single–walled carbon nanotubes inherently exist as a mixture of metallic and semiconducting species, making the isolation of high–purity semiconducting single–walled carbon nanotubes a critical bottleneck for practical transistor applications. To address this challenge, this study proposes an innovative macromolecular topology–engineering strategy. By incorporating highly flexible polyisobutylene soft segments into a rigid poly(naphthalene diimide–alt–bithiophene) conjugated backbone, a series of multiblock copolymers were successfully synthesized. Among various geometric configurations, a unique tri–branched star–shaped architecture, designated as a molecular claw (tAB series), was demonstrated to be the optimal design. This multi–directional block copolymer effectively conforms to the surface curvature of the nanotubes and suppresses the self–aggregation of the rigid backbones, thereby achieving an exceptional semiconducting sorting purity exceeding 99.9%. Furthermore, the resulting polymer/semiconducting single–walled carbon nanotube hybrids exhibit outstanding multifunctional performance in organic electronic applications. For phototransistor memory applications, the tAB–2 composite film featuring a higher soft–segment ratio yields a superb memory window of 80 V along with a high current memory ratio of 10^5, demonstrating excellent charge–trapping and retention capability. Concurrently, in intrinsically stretchable field–effect transistors, the molecular claw topology functions as a nanoscale crosslinker to mitigate irreversible inter–tube sliding. Remarkably, the stretchable devices maintain an unprecedented mobility retention of 140% even under a severe tensile strain of 50%. This work successfully integrates polymer structural design with interface engineering, achieving high performance in phototransistor memory and stretchable field–effect transistors.
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