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| 缺陷钝化钙钛矿太阳能电池的载流子动力学研究 |
| Carrier dynamics study of defect passivated perovskite solar cells |
| 投稿时间：2023-03-23 |
| DOI：10.3969/j.issn.1005-5630.202303230073 |
| 中文关键词: 钙钛矿 太阳能电池 缺陷钝化 瞬态吸收光谱 载流子动力学 |
| 英文关键词:perovskite solar cells defect passivation transient absorption spectrum carrier dynamics |
| 基金项目:国家重点研发计划（2016YFB0501600） |
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| 中文摘要: |
| 以钙钛矿材料作为吸收层的太阳能电池具有成本低，损耗少等优点，受到广泛的关注。钙钛矿太阳能电池的工作机理是光生载流子的产生与传输。然而，存在于材料内部与界面的缺陷会促进载流子复合，阻碍载流子传输，从而降低电池的效率。将丁酰肼（daminozide，DA）作为夹层与添加剂引入到钙钛矿太阳能电池中，极大程度地钝化了缺陷，显著提高了电池效率。利用瞬态吸收技术测得相关样品的时间分辨光谱，通过分析钙钛矿内部的载流子动力学，证实了DA的引入可以大幅钝化钙钛矿薄膜的缺陷，提高光电池性能。这也为制备高性能钙钛矿太阳能电池提供了一定的理论指导。 |
| 英文摘要: |
| Solar cells using perovskite materials as absorption layers have attracted widespread attention due to their low cost and low loss. The working mechanism of perovskite solar cells is the generation and transmission of photo generated carriers. However, the internal defects and the defects at the interface of the material would promote carrier recombination, thus reducing the efficiency of the battery. In this work, daminozide (DA) was introduced as an interlayer and additive into perovskite solar cells, greatly passivating defects and significantly improving battery efficiency. The carrier relaxation dynamics was studied by ultrafast transient absorption spectrum. It is confirmed that the introduction of DA can significantly passivate defects in perovskite films, and led to excellent photovoltaic performance. The study provides theoretical guidance for the preparation of high-performance perovskite solar cells. |
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