Restrained light-soaking and reduced hysteresis in perovskite solar cells employing a helical perylene diimide interfacial layer†,Journal of Materials Chemistry A

当前位置： X-MOL 学术 › J. Mater. Chem. A › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Restrained light-soaking and reduced hysteresis in perovskite solar cells employing a helical perylene diimide interfacial layer†
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2018-05-16 00:00:00 , DOI: 10.1039/c8ta02584c
Liyan Yang _{1,

2,

3,

4,

5} , Mingliang Wu _{2,

3,

4,

5,

6} , Feilong Cai _{1,

2,

3,

4,

5} , Pang Wang _{1,

2,

3,

4,

5} , Robert S. Gurney _{1,

2,

3,

4,

5} , Dan Liu _{1,

2,

3,

4,

5} , Jianlong Xia _{2,

3,

4,

6,

7} , Tao Wang _{1,

2,

3,

4,

5}

Affiliation

An n-type helical molecule perylene diimide (PDI2) has been explored as an efficient interfacial layer between TiO₂ and perovskite for the preparation of perovskite solar cells. The extended π-conjugation of PDI2 ensures a high electron conductivity for efficient charge transport, and the oxygen atoms of the carbonyl groups can chelate with uncoordinated Pb²⁺ to passivate the surface defects of perovskite crystals. It thereby suppresses interfacial recombination, enhances efficiency, and reduces hysteresis and the light-soaking instability. The power conversion efficiency (PCE) of our perovskite solar cells showed negligible dependence on the thickness of the PDI2 interlayer, and the champion device achieved a high PCE of 19.84% and the hysteresis value (ΔPCE) was reduced to 2.34% compared to 6.46% in the perovskite device without the presence of the PDI2 interlayer.

中文翻译：

采用螺旋per二酰亚胺界面层的钙钛矿型太阳能电池具有良好的光吸收约束和降低的滞后性†

n型螺旋分子per二酰亚胺（PDI2）已被研究为TiO ₂和钙钛矿之间的有效界面层，用于制备钙钛矿太阳能电池。PDI2的扩展π共轭可确保较高的电子电导率，以实现有效的电荷传输，并且羰基的氧原子可与未配位的Pb ²⁺螯合钝化钙钛矿晶体的表面缺陷。因此，它抑制了界面重组，提高了效率，并减少了磁滞现象和光浸泡不稳定性。我们的钙钛矿太阳能电池的功率转换效率（PCE）对PDI2中间层的厚度的依赖性可忽略不计，冠军设备实现了19.84％的高PCE，磁滞值（ΔPCE）从6.46％降低至2.34％在钙钛矿型设备中没有PDI2夹层。

更新日期：2018-05-16

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11