Rational Interface Design and Morphology Control for Blade‐Coating Efficient Flexible Perovskite Solar Cells with a Record Fill Factor of 81%,Advanced Functional Materials

当前位置： X-MOL 学术 › Adv. Funct. Mater. › 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.)

Rational Interface Design and Morphology Control for Blade‐Coating Efficient Flexible Perovskite Solar Cells with a Record Fill Factor of 81%
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2020-06-25 , DOI: 10.1002/adfm.202001240
Zhen Wang ₁ , Linxiang Zeng _{1,

2} , Cuiling Zhang ₁ , Yuanlin Lu ₃ , Shudi Qiu ₁ , Chuan Wang _{1,

4} , Chong Liu ₁ , Lijun Pan _{1,

5} , Shaohang Wu ₁ , Jinlong Hu ₁ , Guangxing Liang ₆ , Ping Fan ₆ , Hans‐Joachim Egelhaaf ₇ , Christoph J. Brabec _{7,

8} , Fei Guo ₁ , Yaohua Mai ₁

Affiliation

Halide perovskites are one of the ideal photovoltaic materials for constructing flexible solar devices due to relatively high efficiencies for low‐temperature solution‐processed devices. However, the overwhelming majority of flexible perovskite solar cells are produced using spin coating, which represents a major hurdle for upscaling. Here, a scalable approach is reported to fabricate efficient and robust flexible perovskite solar cells on a polymer substrate. Thiourea is introduced into perovskite precursor solution to modulate the crystal growth, resulting in dense and uniform perovskite thin films on rough surfaces. As a decisive step, a cascade energy alignment is realized for the hole extraction layer by rationally designing a bilayer interface comprised of PEDOT:PSS/PTAA with a distinct offset in the highest occupied molecular orbital levels, enabling markedly enhanced charge extraction and spectral response. An efficiency as high as 19.41% and a record fill factor up to 81% are achieved for flexible perovskite devices processed by a scalable printing method. Equally important, the bilayer interface reinforces the bendability of the indium tin oxide substrate, leading to enhanced mechanical robustness of the flexible devices. These results underpin the importance of morphology control and interface design in constructing high‐performance flexible perovskite solar cells.

中文翻译：

叶片填充效率高的钙钛矿型柔性太阳能电池的合理界面设计和形态控制，记录填充因子达到81％

卤化物钙钛矿是用于构造柔性太阳能设备的理想光伏材料之一，这是因为低温固溶处理设备的效率相对较高。但是，绝大多数柔性钙钛矿太阳能电池是使用旋涂生产的，这代表了扩大规模的主要障碍。在此，据报导一种可扩展的方法来在聚合物衬底上制造有效且坚固的柔性钙钛矿太阳能电池。将硫脲引入钙钛矿前体溶液中以调节晶体生长，从而在粗糙表面上形成致密且均匀的钙钛矿薄膜。作为决定性的一步，通过合理地设计由PEDOT：PSS / PTAA组成的双层界面，在最高占据的分子轨道水平上具有明显的偏移，可以实现空穴提取层的级联能量对准。使电荷提取和光谱响应显着增强。通过可扩展印刷方法加工的柔性钙钛矿设备，效率高达19.41％，记录填充率高达81％。同样重要的是，双层界面增强了铟锡氧化物基底的可弯曲性，从而提高了柔性器件的机械强度。这些结果强调了形态控制和界面设计在构建高性能柔性钙钛矿太阳能电池中的重要性。双层界面增强了铟锡氧化物衬底的可弯曲性，从而提高了柔性器件的机械强度。这些结果强调了形态控制和界面设计在构建高性能柔性钙钛矿太阳能电池中的重要性。双层界面增强了铟锡氧化物衬底的可弯曲性，从而提高了柔性器件的机械强度。这些结果强调了形态控制和界面设计在构建高性能柔性钙钛矿太阳能电池中的重要性。

更新日期：2020-08-08

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