太陽能電池之電性分析

Abstract

近幾年來，鈣鈦礦太陽能電池相較於傳統材料與結構的太陽能電池因其優秀光電性能而備受關注，轉換效率的發展非常快速，然而目前仍存在許多限制，如鈣鈦礦材料在具有光、熱、濕的環境下，容易影響其穩定性，使得鈣鈦礦太陽能電池仍處於相對不成熟的階段，結構以及材料的選擇仍有許多改進空間。 其中，影響鈣鈦礦太陽能電池性能的一個重要關鍵是缺陷密度，造成缺陷密度增加的原因有很多，包括鈣鈦礦層晶體結構缺陷、鈣鈦礦層的降解以及界面接觸產生的缺陷等等，這些缺陷可以通過改進鈣鈦礦太陽能電池的性能材料設計和使用添加劑或化學修飾劑來填補或修復缺陷，以提高材料的電荷傳輸和穩定性。 本研究請英國牛津大學與香港科技大學團隊所製作的鈣鈦礦太陽能電池，主要透過不同方法量測鈣鈦礦太陽能電池電容，企圖深入研究其內部缺陷密度及現象，並分析鈣鈦礦太陽能電池有無使用添加劑的狀況下，以及鈣鈦礦太陽能電池經過照光後之缺陷密度，藉由此方法判斷鈣鈦礦太陽能電池的效率及穩定性，並且與文獻進行驗證，提高量測結果的正確性，藉由結果了解缺陷密度如何影響鈣鈦礦太陽能電池的性能與效率，進一步探索鈣鈦礦太陽能電池內部效應。

In recent years, compared with solar cells with traditional materials and structures, perovskite solar cells have attracted much attention because of their excellent photoelectric performance, and the conversion efficiency has developed very rapidly. However, there are still many limitations. For example, perovskite materials have Under light, heat, and humid environments, it is easy to affect their stability, making perovskite solar cells still in a relatively immature stage, and there is still much room for improvement in the selection of structures and materials. Among them, the defect density is an important key affecting perovskite solar cells' performance. There are many reasons for the increase in defect density, including defects in the crystal structure of the perovskite layer, degradation of the perovskite layer, and defects generated by interface contacts. The charge transport and stability of the material can be improved by improving the performance material design of perovskite solar cells and using additives or chemical modifiers to fill or repair defects. In this study, the perovskite solar cells produced by the team of Oxford University and Hong Kong University of Science and Technology were mainly used to measure the capacitance of perovskite solar cells by different methods, in an attempt to deeply study the internal defect density and phenomenon, and analyze the perovskite solar cells. With or without the use of additives in the solar cell, and the defect density of the perovskite solar cell after being illuminated, the efficiency and stability of the perovskite solar cell can be judged by this method, and verified with the literature to improve the accuracy of the measurement results Through the results, we can understand how the defect density affects the performance and efficiency of perovskite solar cells, and further explore the internal effects of perovskite solar cells.