- 學位論文
以不同的PCBM分子堆疊薄膜研究反式結構鈣鈦礦太陽能電池
Investigations of inverted-type MAPbI3 solar cells with the different molecular packing structures in the PCBM thin film
摘要
能源是從古至今大家非常關注的議題，於工業革命後，能源的使用也越來越多，隨著綠色能源漸漸被大家重視，其中鈣鈦礦晶體薄膜被視為最有潛力的材料之一，鈣鈦礦吸光材料為一種有機金屬鹵化物材料，吸光的效率很高，且製作時不需要真空環境，製作成品較低。 本論文研究的太陽能電池之結構為Ag/PCBM/MAPbI₃/P3CT-Na/ITO/glass。使用常溫溶液旋轉塗佈法製作反式結構鈣鈦礦太陽能電池元件，Ag與ITO分別為元件的陰極與陽極，鈣鈦礦(CH₃NH₃PbI₃，MAPbI₃)晶體薄膜為主動層，碳六十衍生物(PCBM)與聚噻吩(P3CT-Na)分別為電子傳遞層與電洞傳遞層。 氟苯、氯苯、溴苯、碘苯或苯類混合溶液做為PCBM薄膜製程的溶劑，用以填補鈣鈦礦晶體薄膜的表面缺陷、並且做為元件電子傳遞層。透過分析照光下J-V曲線圖、吸收度光譜、原子力顯微影像、X光繞射圖譜、水滴接觸角影像等數據來了解PCBM薄膜的分子堆疊特性對於太陽能電池的光伏表現之影響。實驗結果顯示使用氯苯及溴苯的混合溶液做PCBM薄膜製程的溶劑，可以同時提升反式結構鈣鈦礦薄膜太陽能電池的開路電壓、電路電流密度、填充因子。
並列摘要
In two decades, energy is a topic of great concern to everyone. After the industrial revolution, the use of energy has also increased, and the green energy is gradually being valued by everyone. Perovskite crystal thin films have received a lot of attentions, which has the highest potential to be used as the light absorber of solar cells. Low fabrication cost and high absorption coefficient of organic-inorganic perovskite materials are the main advantages. In this study, the investigated device structure is Ag/PCBM/MAPbI₃/P3CT-Na/ITO/glass. The inverted-type perovskite solar cell devices were fabricated by using the spin coating methods at low temperatures. Ag and ITO thin films are used as the cathode and anode, respectively. MAPbI₃ (CH₃NH₃PbI₃) thin film is used as the active layer. PCBM and P3CT-Na thin films are used as the electron transport layer and hole transport layer, respectively. Fluorobenzene (FB), chlorobenzene (CB), bromobenzene (BrB), iodobenzene (IB) or solvent mixstures are used as the solvent in the fabrication process of PCBM thin films. The resultant PCBM thin films are the electron transport layer of solar cells while deactivating the surface defects of the perovskite thin films. Light current density-voltage curves, absorbance spectra, atomic force microscopic images, X-ray diffraction patterns and water-droplet contact angle images are used to understand that the influence of PCBM molecular packing structures on the photovoltaic performance of the resultant MAPbI₃ solar cells. The experimental results show that the use of PCBM/CB:BrB precursor solutions can increase the open-circuit voltage, short-circuit current density and fill factor of the inverted MAPbI₃ solar cells.