在热应力下可视化宽带间隙矿石太阳能电池的结构性质连接
Degong Ding1, Yuxin Yao1, Pengjie Hang1
1State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science & Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027, China.
概括
宽带间隙矿太阳能电池 (PSC) 面临热稳定性问题. 在现场的TEM显示,热引起的缺陷和扩散降低了PSC的性能,指导了稳定的并联太阳能电池的开发.
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.
- 纳米技术 纳米技术
背景情况:
- 宽带间隙矿太阳能电池 (PSC) 对于合光伏应用至关重要.
- 设备的热稳定性仍然是PSC的一个重大挑战,阻碍了它们的商业可行性.
研究的目的:
- 彻底研究宽带间隙PSC的热降解机制.
- 了解材料结构与在热应力下设备性能之间的关系.
主要方法:
- 在现场使用原子分辨率传输电子显微镜 (TEM) 来观察动态过程.
- 光伏性能表征是在热应力下进行的.
- 密度函数理论 (DFT) 的计算被用来阐明降解机制.
主要成果:
- 在现场TEM捕捉了高温下形态依赖性缺陷的形成和扩散.
- 沿着受损的矿表面观察到扩散到孔运输层中,显著降低了性能.
- 在更高的温度下,原子相过渡到化 (PbI2) 发生,揭示了一个拓连贯的接口.
结论:
- 提出了矿表面损伤和化物扩散之间的相互诱导机制.
- 了解这些降解途径是开发热稳定的PSC的关键.
- 这项研究引导了开发稳定的单立体矿/双联太阳能电池的方向.
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