直接於304不鏽鋼箔片上成長奈米碳管做為染料敏化太陽能電池對電極之研究

本研究是以商用304不鏽鋼箔片為基材，使用熱化學氣相沉積法於304不鏽鋼箔片上直接成長奈米碳管，並將其應用在染料敏化太陽能電池之對電極上，藉以取代傳統之透明導電玻璃與鉑貴金屬薄膜之使用，並且保有鉑貴金屬薄膜催化碘三根離子的還原能力。不鏽鋼箔片具有其良好的導電性，透過簡單且價格低廉的熱化學氣相沉積法直接將奈米碳管成長於此基板上，期望能提升太陽能電池元件之光電轉換效率，並同時兼顧簡單製造與低成本之優點。本研究利用拉曼光譜儀(Raman)量測奈米碳管之D-band與G-band特徵振動模式，及利用掃瞄式電子顯微鏡(SEM)觀測其表面形貌。以304不鏽鋼上直接成長奈米碳管作為對電極所製備之染料敏化太陽能電池，利用模擬太陽光之檢測系統((AM1.5)，入射光源強度為100 mW/cm^2)所量測出之光電轉換效率、開路電壓、短路電流、填充因子分別為5.4%、0.725 V、13.31 mA/cm^2、0.56，相較於傳統以電子束蒸鍍機製備之鉑薄膜為5.6%、0.675 V、13.82 mA/cm^2、0.6，具有優異之光電轉換效率的成果，其光電轉換效率相較於鉑金屬觸媒達到96.4%。相較於傳統之鉑觸媒對電極。在不鏽鋼箔片上合成奈米碳管可直接進行對電極之製備，不需要額外的基板進行輔助(例：FTO導電玻璃)，證實了此方法可大幅的提升效率且降低染料敏化太陽能電池製作成本。

關鍵字

不鏽鋼箔片；奈米碳管；對電極；染料敏化太陽能電池

並列摘要

In this study, carbon nanotubes (CNTs) were directly synthesized on the commercial 304 stainless steel foil (SSF) via the chemical vapor deposition. The obtained CNTs/SSF was applied as the counter electrode (CE) for dye-sensitized solar cells (DSSCs), in order to replace the transparent conductive glass and the noble metal of platinum. The SSF provided the excellent conductivity, and the CNTs showed the outstanding catalytic ability for reduction of I_3^-. Raman spectroscopy and scanning electron microscopy were used to examine the characteristic features of CNTs. The power conversion efficiency of the DSSCs was measured using a solar simulator under AM 1.5 (100 mW cm^(-2)) illumination. The open circuit voltage, short circuit current density and fill factor of the DSSC assembled with the CNTs/SSF CE were 0.725 V, 13.31 mA/cm^2 and 0.56, respectively, and yield the conversion efficiency of 5.4%, which approached that of the DSSCs with a Pt CE (5.60%). The results demonstrated that the CNTs/SSF could significantly improve the manufacturing cost without using transparent conductive glass and Pt of DSSCs.

並列關鍵字

Carbon nanotubes ； Stainless steel ； Counter electrode ； Dye-sensitized solar cells

國際替代計量

直接於304不鏽鋼箔片上成長奈米碳管做為染料敏化太陽能電池對電極之研究

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