2024-04-29 11:27:31
14.09%效率,高效稳定2D钙钛矿太阳能电池
陈红征团队首次实现了高质量2D BA2MAn-1PbnI3n+1(n = 5)钙钛矿薄膜的制备,晶粒尺寸增大超过1 μm,优先取向生长将第二间隔阳离子(SSC+)引入前体溶液中。研究表明,SSC+添加可以在前体溶液中诱导聚集。前体聚集体通过诱导成核和减少成核位点有利于形成大晶粒。采用苯乙基铵作为SSC+,优化的倒置平面钙钛矿太阳能电池的最高效率为14.09%,这是BA2MAn-1PbnI3n+1(n = 5)的最高值。未密封的装置通过在暴露于空气1000小时后保持其初始效率的约90%(相对湿度为 25±5%),显示出良好的水分稳定性。Lian, X. , Chen, J. , Qin, M. , Zhang, Y. , Shuoxun, T. , Lu, X. , Wu, G. and Chen, H. (2019), The Second Spacer Cation Assisted Growth of 2D Perovskite Film with Oriented Large Grain for Highly Efficient and Stable Solar Cells. Angew. Chem. Int. Ed.. 2019Doi:10.1002/anie.201902959https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.201902959