反式有機太陽能電池穩定性改善研究

Abstract

本論文研究聚焦於提升反式有機太陽能電池對紫外光的穩定性，透過溶膠凝膠法(Sol-gel process)製備氧化鋅(ZnO)電子傳輸層上構建在雙層鈍化層，有效減少界面缺陷，進而提升元件對紫外光的穩定性。研究中，第四章第一小節首先探討單層鈍化層C60的厚度及活性層中CN添加量對元件性能的影響，確立最佳的單層鈍化層製程參數。接著，第二小節研究比較不同溶劑氯苯(CB)、鄰二氯苯(ODCB)對雙層C60鈍化層性能的影響，發現使用鄰二氯苯(ODCB)溶劑製備的雙層鈍化層C60元件，在經過504小時紫外光照射後，性能衰減較少，表現出最佳的穩定性。進一步地，研究比較雙層鈍化層C60與雙層鈍化層C60與PCBM在提升元件紫外光照穩定性方面的效果。實驗結果顯示，雙層鈍化層C60雖然初始效率較高，但雙層鈍化層C60與PCBM在長期紫外光照射下表現出更優異的穩定性。最後，第三小節研究探討雙層鈍化層C60和PCBM的製程優化，包括PCBM濃度對元件性能的影響。This research focuses on improving the stability of inverted organic solar cells by constructing a double-layer passivation layer on a zinc oxide (ZnO) electron transport layer prepared by a sol-gel process. This effectively reduces interface defects and thus improves the UV light stability of the device. In the first section of Chapter 4, we initially explored how the thickness of the single-layer C60 passivation layer and the concentration of CN additive in the active layer impacted device performance, allowing us to determine the optimal process parameters for the single-layer passivation. Following this, the second section investigated and compared how different solvents—chlorobenzene (CB) and ortho-dichlorobenzene (ODCB)—affected the performance of double-layer C60 passivation layers. We discovered that devices prepared with a double-layer C60 passivation layer using the ortho-dichlorobenzene (ODCB) solvent showed less performance degradation after 504 hours of UV irradiation, demonstrating superior stability. Furthermore, we compared the effectiveness of a double-layer C60 passivation layer with a double-layer C60 and PCBM passivation layer in improving device stability under UV light exposure. Experimental results revealed that while the double-layer C60 passivation had higher initial efficiency, the double-layer C60 and PCBM passivation exhibited more excellent stability during prolonged UV irradiation. Finally, the third section focused on optimizing the manufacturing process for the double-layer C60 and PCBM passivation layer, including studying the influence of PCBM concentration on device performance.