Developing D–π–D hole-transport materials for perovskite solar cells: the effect of the π-bridge on device performance,Materials Chemistry Frontiers

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Developing D–π–D hole-transport materials for perovskite solar cells: the effect of the π-bridge on device performance
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2020-11-7 , DOI: 10.1039/d0qm00719f
Yangmei Ou _{1,

2,

3,

4,

5} , Anxin Sun _{1,

2,

3,

4,

5} , Haibei Li _{5,

6,

7,

8} , Tai Wu _{1,

2,

3,

4,

5} , Dongyang Zhang _{1,

2,

3,

4,

5} , Peng Xu _{1,

2,

3,

4,

5} , Rongmei Zhao _{1,

2,

3,

4,

5} , Liqiong Zhu _{1,

2,

3,

4,

5} , Runtao Wang _{1,

2,

3,

4,

5} , Bo Xu _{9,

10,

11} , Yong Hua _{1,

2,

3,

4,

5} , Liming Ding _{5,

12,

13,

14,

15}

Affiliation

Three cost-effective D–π–D hole transport materials (HTMs) with different π-bridges, including biphenyl (SY1), phenanthrene (SY2), and pyrene (SY3), have been synthesized via a one-pot reaction with cheap commercially available starting materials for application in organic–inorganic hybrid perovskite solar cells (PSCs). The effects of the various π-bridges on the photophysical, electrochemical, and electrical properties, and film morphologies of the materials, as well as on the photovoltaic properties of the PSCs, have been systematically investigated accordingly. Our results clearly show that HTM-SY3 with pyrene as the π-bridge exhibits higher hole mobility and better hole extraction/transport and film formation abilities than the other two HTMs. Devices that employed SY3 as the HTM show impressive power conversion efficiency (PCE) values of 19.08% and 13.41% in (FAPbI₃)_0.85(MAPbBr₃)_0.15- and CsPbI₂Br-based PSCs, respectively, which are higher than those of the reference HTM-SY1- and SY2-based ones. Our studies demonstrate a promising strategy to rationally design and synthesize low-cost and efficient HTMs through structural engineering for use in PSCs.

中文翻译：

开发用于钙钛矿型太阳能电池的D–π–D空穴传输材料：π桥对器件性能的影响

通过一锅反应和便宜的商业化方法合成了三种具有成本效益的具有不同π桥的D–π–D空穴传输材料（HTM），包括联苯（SY1），菲（SY2）和pyr（SY3）。适用于有机-无机混合钙钛矿太阳能电池（PSC）的可用原料。因此，已经系统地研究了各种π桥对光物理，电化学和电学性质以及材料的膜形态以及对PSC的光伏性质的影响。我们的结果清楚地表明，HTM- SY3用pyr作为π桥比其他两个HTM具有更高的空穴迁移率和更好的空穴提取/传输以及成膜能力。使用SY3作为HTM的设备在（FAPbI ₃）_0.85（MAPbBr ₃）_0.15-和CsPbI ₂ Br基PSC中的功率转换效率（PCE）值分别达到19.08％和13.41％，令人印象深刻。参考基于HTM- SY1和SY2的。我们的研究表明，通过用于PSC的结构工程合理设计和合成低成本高效HTM的战略很有前途。

更新日期：2020-12-10

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