The DOI matches its Crossref record; 32 of the 32 references it cites were found in a registry or an index.
Chlorine Vacancy Passivation in Mixed Halide Perovskite Quantum Dots by Organic Pseudohalides Enables Efficient Rec. 2020 Blue Light-Emitting Diodes
Abstract
Blue-emitting perovskites can be easily attained by precisely tuning the halide ratio of mixed halide (Br/Cl) perovskites (MHPs). However, the adjustable halide ratio hinders the passivation of Cl vacancies, the main source of trap states leading to inferior performance of blue MHP light-emitting diodes (LEDs). Here, we report a strategy for passivating Cl vacancies in MHP quantum dots (QDs) using nonpolar solvent-soluble organic pseudohalide [ n -dodecylammonium thiocyanate (DAT)], enabling blue MHP LEDs with greatly enhanced efficiency. Density functional theory calculations reveal that the thiocyanate (SCN – ) groups fill in the Cl vacancies and remove electron traps within the bandgap. DAT-treated CsPb(Br x Cl 1– x ) 3 QDs exhibit near unity (∼100%) photoluminescence quantum yields, and their blue (∼470 nm) LEDs are spectrally stable with an external quantum efficiency of 6.3%, a record for perovskite LEDs emitting in the range of 460–480 nm relevant to Rec. 2020 display standards, and a half-lifetime of ∼99 s.
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Perovskite light-emitting diodes with external quantum efficiency exceeding 20 per cent
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Self-citationQuantum Dot Light‐Emitting Diodes Based on Inorganic Perovskite Cesium Lead Halides (CsPbX3)
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Self-citationPerovskite light-emitting diodes based on spontaneously formed submicrometre-scale structures
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Self-citationCarrier lifetimes of >1 μs in Sn-Pb perovskites enable efficient all-perovskite tandem solar cells
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Self-citationStabilizing halide perovskite surfaces for solar cell operation with wide-bandgap lead oxysalts
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Cited by
Metal Halide Perovskites for X-ray Imaging Scintillators and Detectors
Zhou, Y., Chen, J., Bakr, O. M., & Mohammed, O. F. (2021) · ACS Energy Letters · doi:10.1021/acsenergylett.0c02430 · Cited by 891
Self-citationMixed halide perovskites for spectrally stable and high-efficiency blue light-emitting diodes
Karlsson, M., Yi, Z., Reichert, S., Luo, X., Lin, W., Zhang, Z., Bao, C., Zhang, R., Bai, S., Zheng, G., et al. (2021) · Nature Communications · doi:10.1038/s41467-020-20582-6 · Cited by 494
Surface Chemistry Engineering of Perovskite Quantum Dots: Strategies, Applications, and Perspectives
Bai, Y., Hao, M., Ding, S., Chen, P., & Wang, L. (2022) · Advanced Materials · doi:10.1002/adma.202105958 · Cited by 394
Passivation strategies for mitigating defect challenges in halide perovskite light-emitting diodes
Shen, X., Kang, K., Yu, Z., Jeong, W. H., Choi, H., Park, S. H., Stranks, S. D., Snaith, H. J., Friend, R. H., & Lee, B. R. (2023) · Joule · doi:10.1016/j.joule.2023.01.008 · Cited by 197
Advances in femtosecond laser synthesis and micromachining of halide perovskites
Du, S., Zhang, F., & Ma, L. (2024) · Light: Advanced Manufacturing · doi:10.37188/lam.2024.035 · Cited by 9
Metadata
- Authors
- Zheng, X., Yuan, S., Liu, J., Yin, J., Yuan, F., Shen, W.-S., Yao, K., Wei, M., Zhou, C., Song, K., Zhang, B.-B., Lin, Y., Hedhili, M. N., Wehbe, N., Han, Y., Sun, H.-T., Lu, Z.-H., Anthopoulos, T. D., Mohammed, O. F., Sargent, E. H., Liao, L.-S., & Bakr, O. M.
- Venue
- ACS Energy Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2020-02-11
- Volume
- 5
- Issue
- 3
- Pages
- 793-798
- ISSN
- 2380-8195 (ISSN-L)
- OpenAlex
- W3006085647
- Cited by
- 320
- References
- 32
- FWCI
- 16.63
- Type
- journal article
- Language
- en
- Open access
- closed
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- Zheng, X., Yuan, S., Liu, J., Yin, J., Yuan, F., Shen, W.-S., Yao, K., Wei, M., Zhou, C., Song, K., Zhang, B.-B., Lin, Y., Hedhili, M. N., Wehbe, N., Han, Y., Sun, H.-T., Lu, Z.-H., Anthopoulos, T. D., Mohammed, O. F., . . . Bakr, O. M. (2020). Chlorine Vacancy Passivation in Mixed Halide Perovskite Quantum Dots by Organic Pseudohalides Enables Efficient Rec. 2020 Blue Light-Emitting Diodes. ACS Energy Letters. https://doi.org/10.1021/acsenergylett.0c00057
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