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通过缺陷工程实现无歇斯底里的矿太阳能电池的通用方法
Dae-Yong Son1, Seul-Gi Kim2, Ja-Young Seo2
1Department of Energy Science, Sungkyunkwan University , Suwon 16419, Korea.
Journal of the American Chemical Society
|January 5, 2018
概括
酸补充剂通过防止酸Frenkel缺陷,有效消除酸太阳能电池中的歇斯底里,为稳定,高效的设备铺平了道路.
科学领域:
- 材料科学
- 太阳能发电
- 固态化学
背景情况:
- 有机-无机化矿为太阳能电池提供高功率转换效率 (PCE),超过22%.
- 矿太阳能电池中的电流密度-电压 (J-V) 歇斯底里阻碍了PCE的稳定性和可靠性.
- 对于J-V歇斯底里的确切起源仍有争议,并且缺乏有效的解决方案.
研究的目的:
- 开发一种无歇斯底里的矿太阳能电池的通用方法.
- 调查缺陷工程在缓解J-V歇斯底里症中的作用.
- 找出最佳的金属离子来抑制歇斯底里.
主要方法:
- 用各种金属化物 (LiI,NaI,KI,RbI,CsI) 对纯矿和混合矿化合物 (例如CH3NH3PbI3,FA0.85MA0.15PbI2.55Br0.45) 进行注.
- 使用J-V测量来评估hysteresis的矿太阳能电池的特征.
- 分析低频电容和批量陷密度与歇斯底里相对应.
- 理论研究以阐明歇斯底里的原子起源和离子干预的机制.
主要成果:
- 酸 (KI) 注可显著减少或消除各种矿组合中的J-V歇斯底里.
- 基因注导致低频电容和大量陷密度降低,表明陷歇斯底里相关性.
- 理论计算表明,离子可以防止酸弗伦克尔缺陷的形成,这是hysteresis的原始原因.
- 在混合矿系统中,由于K+间形成能量较低,无歇斯底里效应更为明显.
结论:
- 通过 KI 染进行缺陷工程,为实现无歇斯底里的矿太阳能电池提供了通用方法.
- 离子被认为是通过稳定矿晶格来抑制歇斯底里的主要元素.
- 这种方法适用于不同的矿组成和设备结构,使得稳定的高性能太阳能电池成为可能.
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