還原氧化石墨烯摻雜光電極在鈣鈦礦太陽能電池的應用

Application of the reduced graphene oxide doped Photoelectrode in Perovskite Solar Cells

田定南(Ting-Nan Tien)

指導教授 ： 洪添燦

義守大學/理工學院/化學工程學系暨生物技術與化學工程研究所/碩士(2020年)

摘要

本研究探討石墨烯濃度對於鈣鈦礦太陽能電池光電轉換效率的影響，藉由石墨烯的高傳導性提升電子傳輸率，有助於提升元件的光電轉換效率。
在光電極的部分，利用水熱法製備二氧化鈦奈米顆粒(NP 50)，鈣鈦礦薄膜使用一步法製備，輔以XRD分析繞射峰值、SEM觀測加入氯苯與否的表面晶型變化。利用Hummers method製備出還原氧化石墨烯後，輔以SEM進行表面觀測。以加入的石墨烯濃度分別為0.4 wt %、0.5 wt %、0.6 wt %、3 wt %、5 wt %、7 wt %的還原氧化石墨烯-二氧化鈦鍍液製成石墨烯-二氧化鈦光電極。
實驗結果顯示當石墨烯濃度增加，短電流密度由1.29 mA/cm2提升至14.66 mA/cm2、效率值由1.19 %提升至6.92 %，當石墨烯濃度達到5%時，太陽能電池的光電轉換效率達到最高，各項數值分別為Jsc = 14.66 mA/cm2，Voc = 0.53V，FF = 0.88，η = 6.92%。

關鍵字

鈣鈦礦太陽能電池 ； 還原氧化石墨烯 ； 一步法

並列摘要

This study investigated the effects of graphene concentration on the photoelectric conversion efficiencies of perovskite solar cells. The electron transmission rate was increased by the high conductivity of the graphene, which in turn improved the photoelectric conversion efficiencies of the device.
In preparation of photoelectrode, titanium dioxide nano-particles (NP 50) were prepared by the hydrothermal method. The diffraction peaks of the perovskite films, which prepared by a one-step method, were analyzed by the X-ray diffractometer, XRD. The changes of their surface crystalline with or without chlorobenzene were observed by the scanning electron microscope, SEM. The reduced graphene oxides were prepared by the Hummers method, and their surfaces were examined by the SEM. These graphene oxides were then immersed in 0.4, 0.5, 0.6, 3, 5, and 7 wt% of reduced graphene oxide-titanium dioxide plating solution to produce graphene-titanium dioxide photoelectrodes.
The experimental results showed that, along with the increase of graphene concentration, the short-current density was increased from 1.29 mA/cm2 to 14.66 mA/cm2, and the efficiency value was increased from 1.19% to 6.92%. The photoelectric conversion efficiencies of the solar cell reached the highest values, when the graphene concentration was at 5%, at Jsc = 14.66 mA/cm2, Voc = 0.53V, FF = 0.88, and η = 6.92%.

並列關鍵字

perovskite solar cells ； Hummers method ； reduced graphene oxide ； one-step method

參考文獻

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