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对于矿/双太阳能电池的底部电池,高度被动化的TOPC

Zetao Ding^1,2,3, Chenxia Kan⁴, Shengguo Jiang^1,2,3

¹Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, China.

Nature communications

|September 30, 2024

概括

我们通过优化被动化来改进道氧化物被动接触 (TOPCon) 太阳能电池. 这提高了高效矿/双联太阳能电池 (TSC) 的开放电路电压.

科学领域:

太阳能光伏和可再生能源
材料科学与工程材料科学与工程
半导体设备物理半导体设备物理

背景情况:

道氧化物被动接触 (TOPCon) 太阳能电池提供高效率和成本效益,但存在缺陷和低被动化.
氧化/c-Si接口的缺陷以及在p型多Si极限开放电路电压 (V_OCs) 中不足的扩散.
这些局限性阻碍了TOPCon电池集成到矿/双联太阳能电池 (TSC) 中,这对于超过30%的模块效率至关重要.

研究的目的:

开发一种高度被动化的p型TOPCon结构,用于改善太阳能电池中的V_OC.
为了解决当前TOPCon技术在高效矿/双联太阳能电池中的应用方面的局限性.
为了提高下一代光伏设备TOPCon底部电池的性能.

主要方法:

优化了道氧化层的氧化条件.
在p型多晶 (poly-Si) 中进行受控的扩散过程.
嵌入的氧化化用于增强被动化.

主要成果:

在对称的p型TOPCon样本中达到715mV的高暗示V_OC (iV_OC).
在完成的双面TOPCon底部细胞中达到710mV的V_OC.
经过证明的1cm2n-i-p矿/TSC,VOC>1.9V和28.20%的效率 (认证为27.3%).

结论:

优化的p型TOPCon结构显著改善了被动化和V_OC.
这一进步使得高性能矿/双联太阳能电池成为可能.
开发的TOPCon技术为商业化未来高效的双联太阳能电池铺平了道路.

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