The DOI matches its Crossref record; 38 of the 38 references it cites were found in a registry or an index.
Perovskite QLED with an external quantum efficiency of over 21% by modulating electronic transport
Abstract
Perovskite quantum-dot-based light-emitting diodes (QLEDs) are highly promising for future solid-state lightings and high-definition displays due to their excellent color purity. However, their device performance is easily affected by charge accumulation induced luminescence quenching due to imbalanced charge injection in the devices. Here we report green perovskite QLEDs with simultaneously improved efficiency and operational lifetime through balancing the charge injection with the employment of a bilayered electron transport structure. The charge-balanced QLEDs exhibit a color-saturated green emission with a full-width at half-maximum (FWHM) of 18 nm and a peak at 520 nm, a low turn-on voltage of 2.0 V and a champion external quantum efficiency (EQE) of 21.63%, representing one of the most efficient perovskite QLEDs so far. In addition, the devices with modulated charge balance demonstrate a nearly 20-fold improvement in the operational lifetime compared to the control device. Our results demonstrate the great potential of further improving the device performance of perovskite QLEDs toward practical applications in lightings and displays via rational device engineering.
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Perovskite light-emitting diodes with external quantum efficiency exceeding 20 per cent
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Overcoming the electroluminescence efficiency limitations of perovskite light-emitting diodes
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Quantum Dot Light‐Emitting Diodes Based on Inorganic Perovskite Cesium Lead Halides (CsPbX3)
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Self-citationSolution-processed, high-performance light-emitting diodes based on quantum dots
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Properties and potential optoelectronic applications of lead halide perovskite nanocrystals
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Cited by
Colloidal quantum dot electronics
Liu, M., Yazdani, N., Yarema, M., Jansen, M., Wood, V., & Sargent, E. H. (2021) · Nature Electronics · doi:10.1038/s41928-021-00632-7 · Cited by 448
Surface Chemistry Engineering of Perovskite Quantum Dots: Strategies, Applications, and Perspectives
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Metadata
- Authors
- Fang, T., Wang, T., Li, X., Dong, Y., Bai, S., & Song, J.
- Venue
- Science Bulletin
- Publisher
- Elsevier BV
- Published
- 2021-01
- Volume
- 66
- Issue
- 1
- Pages
- 36-43
- ISSN
- 2095-9273 (ISSN-L)
- OpenAlex
- W3080281084
- Cited by
- 267
- References
- 38
- FWCI
- 12.91
- Type
- journal article
- Language
- en
- Open access
- closed
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- Fang, T., Wang, T., Li, X., Dong, Y., Bai, S., & Song, J. (2021). Perovskite QLED with an external quantum efficiency of over 21% by modulating electronic transport. Science Bulletin. https://doi.org/10.1016/j.scib.2020.08.025
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