在低溫製程下製作鈣/鈦複合物作為鈣鈦礦太陽能電池介孔層之研究;The Study of Low-temperature Processed Perovskite Solar Cell by Using Ca/Ti Compounds as Mesoporous layer

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Title:	在低溫製程下製作鈣/鈦複合物作為鈣鈦礦太陽能電池介孔層之研究;The Study of Low-temperature Processed Perovskite Solar Cell by Using Ca/Ti Compounds as Mesoporous layer
Authors:	謝宇辰;Hsieh, Yu-Chen
Contributors:	能源工程研究所
Keywords:	鈣鈦礦太陽能電池;鈣/鈦複合物;低溫製程
Date:	2017-07-26
Issue Date:	2017-10-27 13:48:28 (UTC+8)
Publisher:	國立中央大學
Abstract:	在本篇論文中，我們透過改良實驗室既有的合成技術製備Ca/Ti複合物作為電池元件中的介孔層，再藉由對實驗參數的調整以達到最佳的電池元件表現。我們以三種不同的比例(Ca:Ti)進行合成，利用產物組成的不同，對材料間的能階匹配性進行調整；其中，以1:2(Ca:Ti)比例合成的Ca/Ti複合物應用於電池元件具有最佳的能階匹配性，因此電池元件表現出最高的短路電流(Jsc)以及能量轉換效率(PCE)。更佳的能階匹配性能夠將電子更迅速地傳遞出去，減少因發生電子-電洞再復合所造成的損失。此外，我們以低溫製程來製作鈣鈦礦太陽能電池元件，不僅能夠達到節能減碳的目的，還可以降低實驗的成本；並且希望未來能夠應用於軟性基板上。在材料的部分，我們則是以廢棄的蛋殼作為合成時鈣元素的來源，以達到回收再利用的目的。最後，電池元件效率的量測結果，以TiO2(P90)作為介孔層的鈣鈦礦電池元件作為本實驗之對照組的標準試片，最佳電池元件表現達到Voc=1.02 V，Jsc=18.85 mA/cm2，FF=0.77，PCE=14.60 % ；而實際將所合成之Ca/Ti複合物應用於鈣鈦礦電池元件的介孔層，最佳電池元件表現則是達到Voc=1.02 V，Jsc=22.33 mA/cm2，FF=0.78，PCE=17.60 %。將Ca/Ti複合物應用於鈣鈦礦電池元件的介孔層，能夠使電池元件在Jsc以及PCE上有所提升，而在PCE上的增益達19.7%。 ;In this study, we have successfully synthesized the Ca/Ti compounds as the mesoporous layer for perovskite solar cells. Besides, we further synthesis Ca/Ti compounds with different Ca/Ti ratio to obtain the energy-level matching between the compact layer, the active layer and the mesoporous layer of the perovskite solar cell. We also develop a low-temperature process to fabricate perovskite solar cells without sintering at a temperature of 500 ℃ to achieve the purpose of energy conservation. Eventually, the whole fabrication process of the perovskite solar cells can be done at a heating temperature lower than 180 ℃ which can realize the application of the flexible solar cell in the future. Moreover, as the band gap of the Ca/Ti compounds is 3.47 eV, the short-circuit current density (Jsc) of the perovskite solar cell will improved due to the reduction of the electrons and holes recombination. In comparison with standard perovskite solar cells, the perovskite solar cells with the optimized Ca/Ti compounds as the mesoporous layer can effectively improve the Jsc from 18.85 to 22.33mA/cm2, and enhance the power conversion efficiency (PCE) from 14.70 % to 17.60 %.
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