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https://doi.org/10.21256/zhaw-22962| Publication type: | Article in scientific journal |
| Type of review: | Peer review (publication) |
| Title: | Mobile ions determine the luminescence yield of perovskite light-emitting diodes under pulsed operation |
| Authors: | Kumawat, Naresh Kumar Tress, Wolfgang Gao, Feng |
| et. al: | No |
| DOI: | 10.1038/s41467-021-25016-5 10.21256/zhaw-22962 |
| Published in: | Nature Communications |
| Volume(Issue): | 12 |
| Issue: | 4899 |
| Issue Date: | 2021 |
| Publisher / Ed. Institution: | Nature Publishing Group |
| ISSN: | 2041-1723 |
| Language: | English |
| Subject (DDC): | 621.3: Electrical, communications, control engineering |
| Abstract: | The external quantum efficiency of perovskite light-emitting diodes (PeLEDs) has advanced quickly during the past few years. However, under pulsed operation, an operation mode which is important for display and visible light communication, the performance of PeLEDs changes a lot and requires in-depth understanding to facilitate these applications. Here, we report the response of PeLEDs under pulsed operation in the range of 10 Hz to 20 kHz. Beyond transient effects in the low frequencies, we find that for higher frequencies (>500 Hz) the transient electroluminescence intensity depends strongly on the duty cycle. This feature is much more pronounced and of different origin than that in conventional LEDs. We rationalise our experimental observations using a mathematical model and assign these features to the effect of mobile ionic charges in the perovskite. Our work also provides important implications for the operation of PeLEDs under the steady state, where accumulation of mobile ions at the interfaces could be beneficial for high electroluminescence yields but harmful for the long-term stability. |
| URI: | https://digitalcollection.zhaw.ch/handle/11475/22962 |
| Fulltext version: | Published version |
| License (according to publishing contract): | CC BY 4.0: Attribution 4.0 International |
| Departement: | School of Engineering |
| Organisational Unit: | Institute of Computational Physics (ICP) |
| Published as part of the ZHAW project: | Modellierung und Charakterisierung von neuartigen optoelektronischen Bauelementen |
| Appears in collections: | Publikationen School of Engineering |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| 2021_Kumawat-Tress-Gao_Luminescence-yield-of-perovskite-diodes.pdf | 42.05 MB | Adobe PDF |  View/Open |
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Kumawat, N. K., Tress, W., & Gao, F. (2021). Mobile ions determine the luminescence yield of perovskite light-emitting diodes under pulsed operation. Nature Communications, 12(4899). https://doi.org/10.1038/s41467-021-25016-5
Kumawat, N.K., Tress, W. and Gao, F. (2021) ‘Mobile ions determine the luminescence yield of perovskite light-emitting diodes under pulsed operation’, Nature Communications, 12(4899). Available at: https://doi.org/10.1038/s41467-021-25016-5.
N. K. Kumawat, W. Tress, and F. Gao, “Mobile ions determine the luminescence yield of perovskite light-emitting diodes under pulsed operation,” Nature Communications, vol. 12, no. 4899, 2021, doi: 10.1038/s41467-021-25016-5.
KUMAWAT, Naresh Kumar, Wolfgang TRESS und Feng GAO, 2021. Mobile ions determine the luminescence yield of perovskite light-emitting diodes under pulsed operation. Nature Communications. 2021. Bd. 12, Nr. 4899. DOI 10.1038/s41467-021-25016-5
Kumawat, Naresh Kumar, Wolfgang Tress, and Feng Gao. 2021. “Mobile Ions Determine the Luminescence Yield of Perovskite Light-Emitting Diodes under Pulsed Operation.” Nature Communications 12 (4899). https://doi.org/10.1038/s41467-021-25016-5.
Kumawat, Naresh Kumar, et al. “Mobile Ions Determine the Luminescence Yield of Perovskite Light-Emitting Diodes under Pulsed Operation.” Nature Communications, vol. 12, no. 4899, 2021, https://doi.org/10.1038/s41467-021-25016-5.
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