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具有CuSCN孔提取层的矿太阳能电池产生稳定效率大于20

Neha Arora¹, M Ibrahim Dar², Alexander Hinderhofer³

¹Laboratory of Photonics and Interfaces, Department of Chemistry and Chemical Engineering, Ecole Polytechnique Federale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.

Science (New York, N.Y.)

|October 4, 2017

概括

矿太阳能电池 (PSC) 现在使用廉价的铜酸 (CuSCN) 作为孔提取层,效率超过20%. 添加石墨烯隔离器显著提高了操作稳定性,超过了传统材料.

科学领域:

材料科学
可再生能源
太阳能发电

背景情况:

高效的矿太阳能电池通常依赖于昂贵的有机运输材料.
太阳能发电厂能达到20%以上的效率是太阳能研究的重要基准.

研究的目的:

使用具有成本效益的替代孔提取层来证明PSC的效率超过20%.
研究使用铜酸 (CuSCN) 的PSC的稳定性和性能.

主要方法:

使用CuSCN作为快速溶剂去除技术的孔提取层制造PSC.
在CuSCN和金电极之间加入一个减少的石墨烯氧化物 (rGO) 间隔层.
在加速老化条件下评估设备的效率,热稳定性和操作稳定性.

主要成果:

使用CuSCN的PSC实现了20%以上的稳定效率.
最初的设备由于在CuSCN/Au接口的潜在诱导降解而表现出不良的操作稳定性.
添加rGO间隔层提高了设备的稳定性,在1000小时的老化后保持了95%以上的效率.
与基于spiro-OMeTAD的装置相比,基于CuSCN的PSC在联合照明和热应力下表现出更高的稳定性.

结论:

铜酸是一种可行的,低成本的替代高效PSC的昂贵有机材料.
减少的石墨烯氧化物是缓解降解和改善基于CuSCN的PSC运行稳定的有效中间层.
基于CuSCN的PSC为开发稳定高效的下一代太阳能电池提供了有前途的途径.

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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...