Highly Flexible CsPbI 3 Perovskite Nanocrystal Light-Emitting Diodes
© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim The superior optical and electrical properties of perovskite nanocrystals (NCs) make them attractive for light-emitting diodes (LEDs). However, making stable flexible LEDs still remains a big challenge. Here, highly flexible CsPbI 3 perovskite LEDs were fabricated using a photopolymer as the substrate, and an ultra-smooth Ag films instead of ITO as the bottom electrode. Moreover, the device electron injection was also improved with Ag electrode. The flexible LEDs exhibited excellent electroluminescence characteristics with a low turn-on voltage of 2.0 V and an external quantum efficiency of 8.2%. In addition, the flexible LEDs maintained their good performance after 1000 times of repeated 180 degree stretch-release bending.
Publication Source (Journal or Book title)
Lu, M., Wu, H., Zhang, X., Wang, H., Hu, Y., Colvin, V., Zhang, Y., & Yu, W. (2019). Highly Flexible CsPbI 3 Perovskite Nanocrystal Light-Emitting Diodes. ChemNanoMat, 313-317. https://doi.org/10.1002/cnma.201800359