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Mingzhu Long
The Chinese University of Hong Kong
Corresponding Author
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The electroluminescence efficiency of perovskite light-emitting diodes (PeLEDs) has gained notable achievements, but the poor stability under electric stress severely impedes future practical use. Here, an alkyldiammonium 1,4-butanediamine (BDA) is incorporated into perovskite emitting layer, which substantially optimizes electrochemical stability and minimizes interfacial deep traps under large external bias. The BDA-PeLED shows a record operational half-lifetime T50 of 189.4 h at a high current density of 100 mA cm−2 and 589 hours under 50 mA cm−2. Additionally, the device maintains its original performance upon 2500 cycles of voltage scan and withstands 10000 times of ON-OFF under a pulsed voltage of 2.5 V. Further degradation mechanism study reveals that the main origins of the instability property of PeLEDs without BDA are the generation of deep traps at the interfaces and the infiltration of anions into adjacent layers. The significantly enhanced electrochemical stability suggests that alkyldiammonium cation incorporation provides a direction to solve the instability issue.
Keywords
Alkyldiammonium, perovskite light-emitting diodes (PeLEDs), Dion-Jacobson Perovskite
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There is NO Competing Interest.
This is a list of supplementary files associated with this preprint. Click to download.
- SupplementeryInformationNatCommun.docx
Enhanced Electrochemical Stability by Alkyldiammonium in Dion-Jacobson Perovskite Towards Ultrastable Light-Emitting Diodes
- SupplementeryInformationNatCommun.docx
Enhanced Electrochemical Stability by Alkyldiammonium in Dion-Jacobson Perovskite Towards Ultrastable Light-Emitting Diodes
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A new preprint design is coming!
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This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Article
Mingzhu Long
The Chinese University of Hong Kong
Corresponding Author
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
History
CURRENT STATUS: Posted
Version 1
Posted 01 Dec, 2020
No community comments so far
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
License:
This work is licensed under a CC BY 4.0 License. Read Full License
The electroluminescence efficiency of perovskite light-emitting diodes (PeLEDs) has gained notable achievements, but the poor stability under electric stress severely impedes future practical use. Here, an alkyldiammonium 1,4-butanediamine (BDA) is incorporated into perovskite emitting layer, which substantially optimizes electrochemical stability and minimizes interfacial deep traps under large external bias. The BDA-PeLED shows a record operational half-lifetime T50 of 189.4 h at a high current density of 100 mA cm−2 and 589 hours under 50 mA cm−2. Additionally, the device maintains its original performance upon 2500 cycles of voltage scan and withstands 10000 times of ON-OFF under a pulsed voltage of 2.5 V. Further degradation mechanism study reveals that the main origins of the instability property of PeLEDs without BDA are the generation of deep traps at the interfaces and the infiltration of anions into adjacent layers. The significantly enhanced electrochemical stability suggests that alkyldiammonium cation incorporation provides a direction to solve the instability issue.
Figure 1
Figure 1
Figure 2
Figure 2
Figure 3
Figure 3
Figure 4
Figure 4
There is NO Competing Interest.
This is a list of supplementary files associated with this preprint. Click to download.
- SupplementeryInformationNatCommun.docx
Enhanced Electrochemical Stability by Alkyldiammonium in Dion-Jacobson Perovskite Towards Ultrastable Light-Emitting Diodes
- SupplementeryInformationNatCommun.docx
Enhanced Electrochemical Stability by Alkyldiammonium in Dion-Jacobson Perovskite Towards Ultrastable Light-Emitting Diodes
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