鈣鈦礦太陽能電池(Perovskite solar cell)近年來被學者大量地研究，其低汙染、溶液製程且低成本的特性使得研究前仆後繼。另一方面，石墨烯(Graphene)作為一新穎且有著諸多特性的材料也被科學家所重視。
氧化鋅與二氧化鈦常見於鈣鈦礦太陽能電池中電子傳遞層的材料，本研究在探討添加石墨烯與氧化鋅作結合對於鈣鈦礦太陽能電池效率的影響。利用掃描式電子顯微鏡(Scanning electron microscope)、穿透式電子顯微鏡(Transmission electron microscope)、紫外線分光光譜儀(UV spectroscopy)、光電流轉換效率測量儀(Incident photon conversion efficiency)與X-光繞射儀(X-Ray diffraction)測量元件性質並探討效率提升之原因。
使用還原型石墨烯與氧化鋅混合取代傳統電子傳遞層的材料將效率提高到15.02 %。開路電壓(Open-circuit photovoltage)與短路電流密度(Short circuit current density)皆大幅的提升。推測氧化鋅在主動層與石墨烯中藉由靜電作用力(p–π stacking/electrostatic interaction)扮演重要角色使得電子能順暢傳遞進而提升能量轉移效率(Power conversion efficiency)。

Perovskite solar cell is highly studied by scholars in recent years. With the advantage of low pollution, solution process and low cost, perovskite solar cell’s research does not stop. On the other hand, graphene being a novel material with many properties also attracts the attention of scientists.
Zinc oxide (ZnO) and titanium dioxide (TiO2) are commonly used as the materials of electron transporting layer in perovskite solar cell. In this study, we investigate the influence toward efficiency by adding graphene to combine with zinc oxide. Simultaneously, we use scanning electron microscope, transmission electron microscope, UV spectroscopy, incident photon conversion efficiency and X-Ray diffraction to measure physical properties to explore the reason of efficiency improvement.
With the replacement of traditional materials in electron transporting layer by reduced graphene oxide with a zinc oxide nanoparticle (r-GO-ZnO), power conversion efficiency reaches 15.02 %. Open-circuit photovoltage and short circuit current density also increase massively. We speculate zinc oxide playing a crucial role connecting graphene and active layer via p–π stacking/electrostatic interaction and therefore electrons can transport smoothly with the consequence of enhancement of power conversion efficiency.

摘要 I
Abstract II
目錄 III
圖目錄 V
表目錄 VII
第一章 緒論 1
1-1 前言 1
1-2 研究動機 3
第二章 文獻回顧 4
2-1 太陽能電池的發展歷史 4
2-2 有機太陽能電池發展簡介 6
2-3 有機太陽能電池結構分類 11
2-4 能量轉移機制 14
2-4-1 能量轉移方式 14
2-4-2 工作機制 16
2-5 元件特性參數 18
2-5-1 等效電路(Equivalent circuit) 18
2-5-2 短路電流(Short-circuit photocurrent, Isc) 21
2-5-3 開路電壓(Open-circuit photovoltage, Voc) 22
2-5-4 填充因子(Fill factor, FF) 22
2-5-5 能量轉換效率(Power conversion efficiency, η) 23
2-5-6 外部量子效率(External Quantum Efficiency, EQE) 23
2-6 鈣鈦礦結構 25
2-7 鈣鈦礦太陽能電池發展歷史 28
2-8 石墨烯簡介 31
第三章 實驗部分 32
3-1實驗儀器 32
3-2實驗藥品與溶劑 34
3-3 材料製備 37
第四章 結果與討論 42
4-1 元件性質探討 42
4-1-1 X光繞射儀 43
4-1-2 掃描式電子顯微鏡 45
4-1-3 螢光光譜儀 48
4-1-4 紫外光-可見光分光光譜儀 49
4-1-5 原子力顯微鏡 50
4-2 元件特性參數討論 51
第五章 結論 57
第六章 參考文獻 58

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