靜電紡絲製備二氧化鈦結構與染料敏化太陽能電池之應用

Preparation of electro-spinned titanium dioxide nanofibers and its application in the dye-sensitized Solar Cells

廖元培(Yuan-pei Liao)

指導教授 ： 蘇昭瑾

國立臺北科技大學/工程學院/有機高分子研究所/碩士(2011年)

https://doi.org/10.6841/NTUT.2011.00318

摘要

在染料敏化太陽能電池DSSCs（Dye-Sensitized Solar Cells）系統中，二氧化鈦扮演吸附染料及傳遞電子的重要角色。一維奈米結構可具有增加電子傳遞效率、光的散射及利用率等特性。本研究中將PVA（Polyvinyl alcohol)聚乙烯醇高分子與二氧化鈦前驅物正四丁基氧化鈦混和液，並利用靜電紡絲（Electro-Spinning）加工製備二氧化鈦奈米纖維，依電壓30 – 60 KV與工作距離7- 20 cm的互相搭配，製備二氧化鈦奈米纖維膜，經SEM觀察纖維型態結果，靜電紡絲條件以電壓60 KV搭配工作距離20 cm為最佳結構條件，可獲得平均直徑279.6 nm及連續性的二氧化鈦一維纖維。再將奈米纖維膜經由高溫鍛燒處理去除有機相，仍有二氧化鈦奈米一維的網狀立體結構。透過X光繞射分析儀 （X-ray Differaction，XRD）分析其晶相為銳鈦礦（Anatase）為主。最後在AM 1.5模擬太陽光照射下（100 mW/cm2），進行電池的光電轉換效率測試，得到最佳明顯效率值0.619 %，VOC為0.760 V、JSC為1.208 mA/cm2、FF為0.674。

關鍵字

染料敏化太陽能電池 ； 靜電紡絲技術 ； 奈米纖維 ； 一維結構

並列摘要

In DSSCs (Dye-sensitized solar cells) system, titanium dioxide (TiO2) plays an important role in the dyes adsorption and electron transportation. One dimensional (1D) nano-structure have unique properties such as increase the electron transfer rate, the light scattering efficiency, and utilization. In this study, titanium dioxide nanofibers (1D-TiO2) were fabricated by electrospinning with mixed solution of PVA (polyvinyl alcohol) and titanium precursor (titanium (IV) n-butoxide) at different voltages (30 – 60 KV) and spinning distances (7- 20 cm). After analyzing nanofiber morphology by SEM, the result showed that the optimized electrospinning condition was at voltage of 60 KV and spinning distance of 20 cm, the average diameter of continuity 1D-TiO2 fiber is 279.6 nm. The products were worked up by calcination treatment to remove the organic phase. The 1D-TiO2 is very stable and the 1D structure can be retained after calcination. By XRD (X-ray differaction) analysis, the main crystalline phase for 1D-TiO2 is anatase. Finally, under the AM 1.5 simulated sunlight irradiation environment (100 mW/cm2), the tested cell conversion efficiency is 0.619 %, with VOC of 0.760 V, JSC of 1.208 mA/cm2, and FF is 0.674. Further investigation would be needed for increase of photocurrent as well as DSSC efficiency.

並列關鍵字

DSSCs(Dye-sensitized solar cells) ； Electrospinning ； Nanofiber ； One dimensional structure

參考文獻

應到染料敏化太陽能電池分析", 國立台北科技大學 (2008).

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