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https://doi.org/10.1038/s41467-020-17072-0
Title: | Proton-transfer-induced 3D/2D hybrid perovskites suppress ion migration and reduce luminance overshoot | Authors: | Kim, H. Kim, J.S. Heo, J.-M. Pei, M. Park, I.-H. Liu, Z. Yun, H.J. Park, M.-H. Jeong, S.-H. Kim, Y.-H. Park, J.-W. Oveisi, E. Nagane, S. Sadhanala, A. Zhang, L. Kweon, J.J. Lee, S.K. Yang, H. Jang, H.M. Friend, R.H. Loh, K.P. Nazeeruddin, M.K. Park, N.-G. Lee, T.-W. |
Issue Date: | 2020 | Publisher: | Nature Research | Citation: | Kim, H., Kim, J.S., Heo, J.-M., Pei, M., Park, I.-H., Liu, Z., Yun, H.J., Park, M.-H., Jeong, S.-H., Kim, Y.-H., Park, J.-W., Oveisi, E., Nagane, S., Sadhanala, A., Zhang, L., Kweon, J.J., Lee, S.K., Yang, H., Jang, H.M., Friend, R.H., Loh, K.P., Nazeeruddin, M.K., Park, N.-G., Lee, T.-W. (2020). Proton-transfer-induced 3D/2D hybrid perovskites suppress ion migration and reduce luminance overshoot. Nature Communications 11 (1) : 3378. ScholarBank@NUS Repository. https://doi.org/10.1038/s41467-020-17072-0 | Rights: | Attribution 4.0 International | Abstract: | Perovskite light-emitting diodes (PeLEDs) based on three-dimensional (3D) polycrystalline perovskites suffer from ion migration, which causes overshoot of luminance over time during operation and reduces its operational lifetime. Here, we demonstrate 3D/2D hybrid PeLEDs with extremely reduced luminance overshoot and 21 times longer operational lifetime than 3D PeLEDs. The luminance overshoot ratio of 3D/2D hybrid PeLED is only 7.4% which is greatly lower than that of 3D PeLED (150.4%). The 3D/2D hybrid perovskite is obtained by adding a small amount of neutral benzylamine to methylammonium lead bromide, which induces a proton transfer from methylammonium to benzylamine and enables crystallization of 2D perovskite without destroying the 3D phase. Benzylammonium in the perovskite lattice suppresses formation of deep-trap states and ion migration, thereby enhances both operating stability and luminous efficiency based on its retardation effect in reorientation. © 2020, The Author(s). | Source Title: | Nature Communications | URI: | https://scholarbank.nus.edu.sg/handle/10635/199066 | ISSN: | 2041-1723 | DOI: | 10.1038/s41467-020-17072-0 | Rights: | Attribution 4.0 International |
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