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通过MgF的接触移位,高效和稳定的矿-联太阳能电池

Jiang Liu¹, Michele De Bastiani¹, Erkan Aydin¹

¹KAUST Solar Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia.

Science (New York, N.Y.)

|June 23, 2022

概括

研究人员通过添加纳米薄的MgF2中间层来提高矿-联太阳能电池的效率. 这种间层增强了电子提取,减少了重组,提高了功率转换效率 (PCE) 和稳定性.

科学领域:

材料科学
可再生能源
太阳能发电

背景情况:

由于电子提取接口重组,反向极性 (p-i-n) 的矿太阳能电池 (PSC) 面临性能限制.
这种重新组合显著降低了p-i-n-双联太阳能电池的功率转换效率 (PCE).

研究的目的:

为了减轻p-i-n矿太阳能电池中电子提取接口的重组损失.
为了提高单质矿合太阳能电池的性能和稳定性.

主要方法:

在矿/C60接口通过热蒸发引入1纳米厚的化物 (MgF2).
使用MgF2中间层调整矿表面能量并取代C60.

主要成果:

MgF2中间层促进了有效的电子提取,并抑制了非辐射重组.
获得了1.92V的冠军开放电路电压和提高了80.7%的充电率.
一个稳定的PCE为29.3%被证明是单质矿合太阳能电池 (~1厘米2).

结论:

在MgF2中间层有效地增强了电子提取,并减少了矿与合太阳能电池的重组.
开发的双联太阳能电池表现出高效率和改进的运行稳定性,在1000小时的湿热测试后保持约95%的性能.

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相关概念视频

P-N junction

P-N junction

A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...