有機光伏元件具有全水溶液製程的潛力，同時易於大面積及層疊式串聯製程。本論文旨在開發雙偶極矩氧化鋅奈米粒子應用於有機層疊式太陽能電池的中間層，透過混摻自組裝單分子材料於氧化鋅奈米粒子水溶液中，藉由分子偶極矩和不同鍵結型態來達到分子偶極性梯度分布於氧化鋅奈米粒子中間層中，進而達成具雙偶極性單一中間層，且單一中間層可提供較佳的光穿透率，進而提升元件短路電流。進一步利用光致發光光譜儀分析混摻自組裝單分子材料的氧化鋅奈米粒子中存在的缺陷能階，載子可藉由缺陷能階傳遞，進而提升載子於中間層的再結合率，同時符合能帶匹配性達到完整疊加各子電池的開路電壓。此雙偶極矩單一中間層相較於翻膜製程更易於層疊式大面積元件的製備，並可取代真空製程以達全水溶液製程的目標。

Organic photovoltaic devices have the potential of developing complete solution process which are easy to employ in scale-up and tandem devices. In this work, we develop a solution-process approach to fabricate an ambipolar interlayer for organic tandem solar cells with self-assembled molecules of material 4-(trifluoromethyl)phenylphosphonic acid (CF3BPA-SAMs) mixed in the aqueous solution with ZnO NPs. There are two promising advantages, simple procedure and cost-effective notion. The dipolar gradient is distributed over the ZnO NPs interlayer owing to the electric dipole moment and different bonding types. Using this single ambipolar interlayer provides a better light transmittance and slightly improves the short circuit current of the devices. We further utilize PL to characterize the defect levels of the CF3BPA mixed-ZnO NPs films. The carriers can transfer by these defect levels and the recombination rate can be increased because of the well-matched band alignment. Furthermore, we achieve that the open circuit voltage of two individual cells can be superimposed (Voc=1.20 V). This single interlayer is easier to fabricate the large area tandem devices than the traditional transferable method. Finally, we can attain the complete solution process goal.

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