Ultra-bright and highly efficient inorganic based perovskite light-emitting diodes
- Zhang, Liuqi
- Yang, Xiaolei
- Jiang, Qi
- Wang, Pengyang
- Yin, Zhigang
- Zhang, Xingwang
- Tan, Hairen
- Yang, Yang Michael
- Wei, Mingyang
- Sutherland, Brandon R
- Sargent, Edward H
- You, Jingbi
DOIAbstract
Published version available at: https://www.nature.com/articles/ncomms15640#referencesInorganic perovskites such as CsPbX3 (X=Cl, Br, I) have attracted attention due to their excellent thermal stability and high photoluminescence quantum efficiency. However, the electroluminescence quantum efficiency of their light-emitting diodes was <1%. We posited that this low efficiency was a result of high leakage current caused by poor perovskite morphology, high non-radiative recombination at interfaces and perovskite grain boundaries, and also charge injection imbalance. Here, we incorporated a small amount of methylammonium organic cation into the CsPbBr3 lattice and by depositing a hydrophilic and insulating polyvinyl pyrrolidine polymer atop the...
Add to ORKG