可降解的添加剂对使矿太阳能电池的纯和稳定的α相FAPbI3成为可能
Xuesong Lin1, Hongzhen Su1,2, Xiangqian Shen1
1State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, 200240, China.
Advanced materials (Deerfield Beach, Fla.)
|March 28, 2025
概括
研究人员开发了一种新方法,用于稳定,纯黑相formamidinium酸 (FAPbI3) 矿. 这一进步提高了太阳能电池的效率和稳定性,为改进的光伏技术铺平了道路.
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:
- 纯黑相酸 (FAPbI3) 对于太阳能电池来说是非常理想的,因为它具有最佳的带隙和热稳定性.
- 实现稳定,纯黑相FAPbI3一直是矿太阳能电池研究的一个重大挑战.
研究的目的:
- 开发一种纯黑相FAPbI3.3的定向生长方法.
- 为了提高基于FAPbI3的太阳能设备的稳定性和效率.
- 调查牺牲剂在控制矿相位和晶体方向方面的作用.
主要方法:
- 使用二甲基胺化物 (DEACl) 和形式胺 (Fo) 的组合作为牺牲剂.
- 在矿化过程中采用氨解反应来去除牺牲剂.
- 研究了FAPbI3.3上的晶体结构和应变效应.
- 使用优化的FAPbI3材料制造和测试矿太阳能电池设备.
主要成果:
- 实现了黑相FAPbI3沿111方向的定向增长.
- 在FAPbI3.3中保留了1.49 eV的理想带隙 (Eg).
- 通过FA+离子倾斜,在FAPbI3中减轻了拉伸应变,稳定了黑相.
- 已证明高功率转换效率为25.2% (0.09厘米2) 和24.2% (1.04厘米2).
- 显示出出色的运行稳定性,在1太阳照明下1080小时后保持91.68%的初始效率.
结论:
- 开发的方法成功地产生了纯,稳定的,以111为导向的黑相FAPbI3.3.
- 牺牲剂方法有效地控制了相位和方向,从而产生了高性能矿太阳能电池.
- 稳定的FAPbI3表现出显著的效率和长期运行稳定性,表明其在商业太阳能应用中的潜力.
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