| DC 欄位 |
值 |
語言 |
| DC.contributor | 化學學系 | zh_TW |
| DC.creator | 林祖涵 | zh_TW |
| DC.creator | Tsu-han Lin | en_US |
| dc.date.accessioned | 2010-7-26T07:39:07Z | |
| dc.date.available | 2010-7-26T07:39:07Z | |
| dc.date.issued | 2010 | |
| dc.identifier.uri | http://ir.lib.ncu.edu.tw:88/thesis/view_etd.asp?URN=972203014 | |
| dc.contributor.department | 化學學系 | zh_TW |
| DC.description | 國立中央大學 | zh_TW |
| DC.description | National Central University | en_US |
| dc.description.abstract | 太陽能電池是將光能轉換成電能的一種裝置，利用太陽能發電來做為電力的供應，是目前眾所矚目的研究，太陽能取之不盡、用之不竭的優勢使其在能源上扮演了重要的角色。第三代太陽能電池中的染料敏化太陽能電池 ( DSCs ) 因具有透光性、多色彩、可撓曲及成本低廉等優點，成為近年來科學家研究的重點之ㄧ。 DSCs 所用染料最主要的是以釕過渡金屬為中心的錯合物以及有機小分子，其中有機染料分子因具有材料設計較彈性且吸收係數高的優勢，備受重視。僅管如此，卻只有少數的有機染料分子能有效的吸收遠紅光(FR)及近紅外光(NIR)區的光。NIR染料光敏化劑應用在太陽能電池中的優勢，就是具有極高的吸收係數 (可高達10萬M-1cm-1以上)，且最大吸收波長位於遠紅光或近紅外光的波段。因此，本研究在染料分子結構中引入 Squaraine 片段為中心主體，採用Donor-Accepter的設計概念，利用 thiophene 單元及電洞傳輸能力佳的carbazole 片段做為 donor group，合成出不對稱型的染料 JYL-SQ1、JYL-SQ2 及 THL-SQ3。這三個 squaraine 染料光敏化劑之最大吸收波長分別為 568 nm、603 nm 和 612 nm，吸收係數為 85791 M-1 cm-1、68694 M-1 cm-1和 134151 M-1 cm-1，其中 JYL-SQ2 組裝成電池元件具有最好的光電轉換效率(2.59 %)，為以 N719 染料做為光敏劑之所組成元件效率 (4.40 %) 的60 %，預期以此設計概念來合成 squaraine 染料具有很好的發展潛力。
| zh_TW |
| dc.description.abstract | Solar energy is one of the most promising energy resources due to its cleanliness and abundance. Amongst the newly developed photovoltaic technologies to convert sunlight to electricity, Dye-sensitized solar cells (DSCs) have attracted significant attention as one of the low-cost alternatives for the realistic applications due to their impressive conversion efficiency. Numerous metal-free organic dyes with high molar extinction coefficients have been developed. Nevertheless, there are few dyes which can efficiently absorb the far-red and near-IR lights. In this thesis we synthesize a series of unsymmetrical squaraine photo-sensitizer: JYL-SQ1, JYL-SQ2, and THL-SQ3. These squaraine sensitizers contain a donor group (such as thiopene or carbazole), a conjugate moiety (squaraine) and an acceptor group (indoline with COOH). The carbazole-containing sensitizers show widely absorption bands and the absorption maximum (λmax) of THL-SQ3 is slightly red shifted to 612 nm compared to JYL-SQ1 and JYL-SQ2 (with an absorption maximum at 603 nm and 568 nm, respectively). Furthermore, the corresponding molar absorption coefficient (ε) of THL-SQ3 (134151 M-1 cm-1) is higher than those for JYL-SQ1 (85791 M-1 cm-1) and JYL-SQ2 (68694 M-1 cm-1). The overall conversion efficiency (η) for JYL-SQ2 was 2.59 %, which is 60 % of the N719 based device (4.40 %) fabricated at the same condition. The data reveal that such type of molecular design has great potential to prepare high efficiency sensitizers for dye sensitized solar cells.
| en_US |
| DC.subject | 近紅外光有機染料 | zh_TW |
| DC.subject | 染料敏化太陽能電池 | zh_TW |
| DC.subject | dye-sensitized solar cell | en_US |
| DC.subject | Near-IR dye | en_US |
| DC.title | 應用於染敏電池之不對稱型近紅外光有機染料的合成與性質探討 | zh_TW |
| dc.language.iso | zh-TW | zh-TW |
| DC.title | Synthesis of Unsymmetrical Near-IR Dyes for Dye-Sensitized Solar Cells | en_US |
| DC.type | 博碩士論文 | zh_TW |
| DC.type | thesis | en_US |
| DC.publisher | National Central University | en_US |