CsPbI3和DMA-Incorporated CsPbI3:它们有多稳定?
Darrell Jun Jie Tay1,2, Aakash Sharma2, Yeow Boon Tay1
1School of Materials Sciences and Engineering, Nanyang Technological University, Singapore, Singapore.
二甲 (DMAI) 改善了三 (CsPbI3) 的相稳定性,但加速了设备中的热降解. 封装减缓了这种情况,但DMAI仍然会导致光降解,因此需要替代添加剂来稳定CsPbI3太阳能电池.
科学领域:
- 材料科学 材料科学 材料科学
- 太阳能光伏发电是如何实现的
- 固态化学 固态化学
背景情况:
- 无机三化 (CsPbI3) 是一个有前途的矿太阳能电池材料.
- 虽然CsPbI3提供了比有机-无机变体更好的热稳定性,但它的设备级热稳定性仍未得到充分研究.
- 据报道,二甲基化 (DMAI) 加入增强了CsPbI3相稳定性,但其热稳定性影响尚不清楚.
研究的目的:
- 为了评估DMAI-doped CsPbI3膜和设备的高温相位稳定性.
- 了解DMAI在CsPbI3矿热降解途径中的作用.
- 评估封装对DMAI修饰的CsPbI3太阳能电池的热稳定性的影响.
主要方法:
- 使用和不使用DMAI的CsPbI3薄膜的高温相稳定性分析.
- 在高温下研究DMAI离子损失和酸盐空缺动力学.
- 在热应力下对封装和未封装的CsPbI3太阳能电池进行比较研究.
- 评估与热应力结合的光降解效应.
主要成果:
- 与未使用片相比,DMAI合的CsPbI3薄膜表现出较慢但相似的相转换到非矿相,与DMA+离子损失有关.
- 封装有效地延缓了DMA+释放和随后在DMAI添加剂的CsPbI3薄膜中的相位转化.
- 尽管封装,但DMA+离子会诱导光降解,加剧高温相位不稳定性.
结论:
- 高温相位不稳定性是基于CsPbI3的太阳能电池热稳定性的关键因素.
- DMAI提高了相位稳定性,但引入了光降解路径,使热不稳定性恶化.
- 需要对替代添加剂或DMAI替代剂进行进一步的研究,以获得强大的CsPbI3太阳能电池性能.
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