Regulating the starting location of front-gradient enabled highly efficient Cu(In,Ga)Se2 solar cells via a facile thiol–amine solution approach†,Journal of Materials Chemistry A

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Regulating the starting location of front-gradient enabled highly efficient Cu(In,Ga)Se2 solar cells via a facile thiol–amine solution approach†
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2018-01-30 00:00:00 , DOI: 10.1039/c7ta10889c
Qingmiao Fan _{1,

2,

3,

4,

5} , Qingwen Tian _{1,

2,

3,

4,

5} , Houlin Wang _{1,

2,

3,

4,

5} , Fengming Zhao _{1,

2,

3,

4,

5} , Jun Kong _{1,

2,

3,

4,

5} , Sixin Wu _{1,

2,

3,

4,

5}

Affiliation

The introduction of a double-gallium (Ga) gradient plays a key role in pushing the performance of Cu(In,Ga)Se₂ (CIGSe) solar cells to a more competitive level. In particular, the location of the front-gradient starting position strongly affects the barrier of the electron transport path, and this is not based on either significantly reducing the electron collection or decreasing the fill factor. Here we present and implement a double-Ga gradient design for CIGSe absorber layers using a diamine–dithiol solution approach. By regulating the front-gradient starting location, three CIGSe absorber layers with different Ga gradients were successfully constructed; these materials maximize solar spectrum absorption and improve the charge collection efficiency. Moreover, this facile solution-process approach does not require expensive vacuum equipment and can be applied to roll-to-roll printing technology. By combining optimal front-gradients with the back gradient, the short-circuit current has been increased by 17% and a maximum improvement in CIGSe efficiency to 13.12% achieved through adjusting the front-gradient to an optimum location.

中文翻译：

通过简便的硫醇-胺溶液方法来调节前梯度型高效Cu（In，Ga）Se ₂太阳能电池的起始位置†

引入双镓（Ga）梯度在推动Cu（In，Ga）Se ₂性能方面起着关键作用（CIGSe）太阳能电池达到了更高的竞争水平。特别地，前梯度起始位置的位置强烈地影响电子传输路径的势垒，并且这不是基于显着减少电子收集或减小填充因子。在这里，我们使用二胺-二硫醇溶液方法为CIGSe吸收剂层提供并实施了双Ga梯度设计。通过调节前梯度起始位置，成功构建了三个Ga梯度不同的CIGSe吸收层。这些材料可以最大程度地吸收太阳光谱并提高电荷收集效率。而且，这种简便的溶液处理方法不需要昂贵的真空设备，并且可以应用于卷对卷印刷技术。通过结合最佳的前梯度和后梯度，

更新日期：2018-01-30

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