The DOI matches its Crossref record; 2 of the 2 references it cites were found in a registry or an index.
In-Situ Formed Type I Nanocrystalline Perovskite Film for Highly Efficient Light-Emitting Diode
Abstract
Excellent color purity with a tunable band gap renders organic–inorganic halide perovskite highly capable of performing as light-emitting diodes (LEDs). Perovskite nanocrystals show a photoluminescence quantum yield exceeding 90%, which, however, decreases to lower than 20% upon formation of a thin film. The limited photoluminescence quantum yield of a perovskite thin film has been a formidable obstacle for development of highly efficient perovskite LEDs. Here, we report a method for highly luminescent MAPbBr 3 (MA = CH 3 NH 3 ) nanocrystals formed in situ in a thin film based on nonstoichiometric adduct and solvent-vacuum drying approaches. Excess MABr with respect to PbBr 2 in precursor solution plays a critical role in inhibiting crystal growth of MAPbBr 3, thereby forming nanocrystals and creating type I band alignment with core MAPbBr 3 by embedding MAPbBr 3 nanocrystals in the unreacted wider band gap MABr. A solvent-vacuum drying process was developed to preserve nanocrystals in the film, which realizes a fast photoluminescence lifetime of 3.9 ns along with negligible trapping processes. Based on a highly luminescent nanocrystalline MAPbBr 3 thin film, a highly efficient green LED with a maximum external quantum efficiency of 8.21% and a current efficiency of 34.46 cd/A was demonstrated.
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Cites
Water photolysis at 12.3% efficiency via perovskite photovoltaics and Earth-abundant catalysts
Luo, J., Im, J.-H., Mayer, M. T., Schreier, M., Nazeeruddin, M. K., Park, N.-G., Tilley, S. D., Fan, H. J., & Grätzel, M. (2014) · Science · doi:10.1126/science.1258307 · Cited by 2,509
Self-citationImpact of microstructure on local carrier lifetime in perovskite solar cells
de Quilettes, D. W., Vorpahl, S. M., Stranks, S. D., Nagaoka, H., Eperon, G. E., Ziffer, M. E., Snaith, H. J., & Ginger, D. S. (2015) · Science · doi:10.1126/science.aaa5333 · Cited by 2,198
Cited by
Low dimensional metal halide perovskites and hybrids
Zhou, C., Lin, H., He, Q., Xu, L., Worku, M., Chaaban, M., Lee, S., Shi, X., Du, M.-H., & Ma, B. (2019) · Materials Science and Engineering: R: Reports · doi:10.1016/j.mser.2018.12.001 · Cited by 489
Improving the Stability of Metal Halide Perovskite Materials and Light‐Emitting Diodes
Cho, H., Kim, Y., Wolf, C., Lee, H., & Lee, T. (2018) · Advanced Materials · doi:10.1002/adma.201704587 · Cited by 470
A Bifunctional Lewis Base Additive for Microscopic Homogeneity in Perovskite Solar Cells
Lee, J.-W., Bae, S.-H., Hsieh, Y.-T., De Marco, N., Wang, M., Sun, P., & Yang, Y. (2017) · Chem · doi:10.1016/j.chempr.2017.05.020 · Cited by 459
Self-citationHan, D., Imran, M., Zhang, M., Chang, S., Wu, X.-G., Zhang, X., Tang, J., Wang, M., Ali, S., Li, X., et al. (2018) · ACS Nano · doi:10.1021/acsnano.8b05172 · Cited by 298
Zero-Dimensional Cesium Lead Halides: History, Properties, and Challenges
Akkerman, Q. A., Abdelhady, A. L., & Manna, L. (2018) · The Journal of Physical Chemistry Letters · doi:10.1021/acs.jpclett.8b00572 · Cited by 258
Metadata
- Authors
- Lee, J.-W., Choi, Y. J., Yang, J.-M., Ham, S., Jeon, S. K., Lee, J. Y., Song, Y.-H., Ji, E. K., Yoon, D.-H., Seo, S., Shin, H., Han, G. S., Jung, H. S., Kim, D., & Park, N.-G.
- Venue
- ACS Nano
- Publisher
- American Chemical Society (ACS)
- Published
- 2017-03-13
- Volume
- 11
- Issue
- 3
- Pages
- 3311-3319
- ISSN
- 1936-0851 (ISSN-L)
- 1936-086X
- OpenAlex
- W2593347269
- Cited by
- 171
- References
- 2
- FWCI
- 12.31
- Type
- journal article
- Language
- en
- Open access
- closed
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