离子液体辅助策略用于无机基矿薄膜的形态工程,以实现高性能太阳能电池
Gulzhan Zhumadil1,2, Menghua Cao3, Yu Han3
1Department of Electrical and Computer Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Astana 010000, Kazakhstan.
ACS applied materials & interfaces
|October 31, 2024
概括
离子液添加剂[EMIM]+[PF6]-促进了CsPbI2Br矿太阳能电池中的大粒形成. 这种方法增强了结晶,提高了薄膜质量,并将功率转换效率提高到17.11%.
科学领域:
- 材料科学 材料科学 材料科学
- 可再生能源可再生能源是可再生能源.
- 固态化学 固态化学
背景情况:
- 宽带间隙CsPbI2Br矿对于稳定的双联太阳能电池至关重要.
- 矿太阳能电池 (PSC) 的性能在很大程度上取决于矿层质量和结晶.
- 控制CsPbI2Br结晶以获得均的形态和大粒是具有挑战性的.
研究的目的:
- 研究离子液 (IL) [EMIM]+[PF6]-作为添加剂对CsPbI2Br薄膜结晶的作用.
- 探索IL的结合如何影响膜形态,晶体结构和光电子特性.
- 为了提高基于CsPbI2Br的矿太阳能电池的性能和稳定性.
主要方法:
- 将不同量的[EMIM]+[PF6]-离子液体加入到CsPbI2Br前体溶液中.
- 薄膜形态,晶体结构 (XRD) 和光学特性 (UV-vis,PL) 的表征.
- 使用修改后的CsPbI2Br薄膜制造矿太阳能电池的制造和性能测试.
主要成果:
- 离子液体[EMIM]+[PF6]-作为异质核化场所,加速结晶并促进大粒形成.
- 结合IL导致紫外线和PL光谱的红移,表明电子带结构的变化.
- 优化的IL含量产生了高度结晶的薄膜,缺陷密度降低,载体运输改善,形态增强.
- 使用IL添加剂的CsPbI2BrPSC实现了功率转换效率 (PCE) 的17.11% (稳定为15.87%) 和V_OC的1.39V.
- 与控制装置相比,在IL-修改的PSC中观察到设备稳定性的改善.
结论:
- 离子液体[EMIM]+[PF6]-是一种有效的添加剂,可以控制CsPbI2Br结晶并提高薄膜质量.
- 这种简单的方法产生了具有优良形态的高度晶体的CsPbI2Br薄膜,提高了PSC的性能和稳定性.
- 这些发现为开发高效且可重复的基于Cs的矿石太阳能电池提供了宝贵的进展.
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