奈米氧化銦錫粒子電極於錫鈣鈦礦太陽能電池之研究及應用

Application of Indium-Tin-Oxide (ITO) Nanoparticles as a Hole-Extraction Electrode in Tin-based Perovskite Solar Cells

許亮宇(Liang-Yu Hsu)

指導教授 ： 曾建銘

國立交通大學/理學院/應用化學系所/碩士(2020年)

摘要

在本文中，我們製作了另一種新的電極材料取代傳統上使用的碳電極並
應用於無鉛鈣鈦礦太陽能電池當中。我們將此種電極材料稱作氧化銦錫電
極，由於氧化銦錫電極之再結合電阻相較於碳電極來的大，元件在電壓的部分有了顯著改善。此外由於氧化銦錫電極為透明的電極能夠給元件帶來更多的進光量，使的元件的電流也有了不錯的提升。然而，為了改善氧化銦錫電極本身的導電性，我們比較了不同厚度氧化銦錫電極層對於元件光電轉換效率的影響作了探討。此外，由於氧化銦錫電極並非疏水性，相較於疏水性的碳電極，在鈣鈦礦溶液滲透的過程中面臨了較大的挑戰，為了改善滲透的問題，我們透過調整鈣鈦礦溶液濃度的方式解決。
另一方面，在鈣鈦礦溶液的選用上，我們根據本實驗室先前的研究成果，
同樣採用了 Formamidinium iodide (FAI) 與 Guanidinium iodide (GAI) 的組合，並透過添加 EDAI2 改善元件的效率， 不同 EDAI2 含量對於元件的影響也會在本實驗中進行探討。
最後，我們將四重印刷的氧化銦錫電極與優化完的濃度 1.15 m 的
GA0.2FA0.8SnI3-15% EDAI2 鈣鈦礦溶液做結合，此種元件成功達成了平均4.7%最高效率為5.4%的光電轉換效率。

關鍵字

鈣鈦礦 ； 無鉛 ； 太陽能電池 ； 氧化銦錫

並列摘要

In this thesis, we have introduced a new kind of electrode to substitute for the traditionally used Carbon-electrode, and applied the newly discovered electrode to tin-based perovskite solar cell. We call this Indium-Tin-Oxide (ITO) electrode. And because the recombination resistance of ITO electrode is much larger than that of carbon electrode, the voltage of ITO device is improving a lot. In addition, ITO electrode is transparent as opposed to opaque, so It can let light pass through itself. Because of this, the current of ITO device is also increasing. However, in order to improve the conductivity of ITO electrode, we have made a detailed comparison between the impacts of ITO device of different thickness on the power conversion efficiency. Besides, as compared to the hydrophobicity of carbon electrode, ITO electrode is hydrophilicity, and it will meet with a bigger challenge in the process of pore-filling. In order to solve pore-filling, we adjust the concentration of perovskite solution. On the other hand, in the selecting of perovskite solution, we have adopted a combination of Formamidinium iodide (FAI), Guanidinium iodide (GAI), and EDAI2 on the basis of the previous research achievement. The last, we have combined the quadruple-screenprinted ITO electrode and the modified concentration—1.15M GA0.2FA0.8SnI3-15%EDAI2 to help boost the device performance, and it has successfully reached 4.7% and 5.4% for the best cell.

並列關鍵字

Perovskite ； Lead-free ； Solar Cells ； ITO

參考文獻

1. National Renewable Energy Laboratory (NREL), Golden, CO

2. Yi, Z.; Ladi, N. H.; Shai, X.; Li, H.; Shen, Y.; Wang, M., Will organic–inorganic hybrid halide lead perovskites be eliminated from optoelectronic applications? Nanoscale Adv. 2019, 1, 1276-1289.

3. Pazoki, M.; Johansson, M. B.; Zhu, H.; Broqvist, P.; Edvinsson, T.; Boschloo, G.; Johansson, E. M. J., Bismuth Iodide Perovskite Materials for Solar Cell Applications: Electronic Structure, Optical Transitions, and Directional Charge Transport. J. Phys. Chem. C 2016, 120, 29039-29046.

4. Kojima, A.; Teshima, K.; Shirai, Y.; Miyasaka, T., Organometal Halide Perovskites as Visible-Light Sensitizers for Photovoltaic Cells. J. Am. Chem. Soc. 2009, 131, 6050-6051.

5. Kim, H. S.; Lee, C. R.; Im, J. H.; Lee, K. B.; Moehl, T.; Marchioro, A.; Moon, S. J.; Humphry-Baker, R.; Yum, J. H.; Moser, J. E.; Gratzel, M.; Park, N. G., Lead iodide perovskite sensitized all-solid-state submicron thin film mesoscopic solar cell with efficiency exceeding 9%. Sci. Rep. 2012, 2, 591.