Enhanced stability and performance of light-emitting diodes based on in situ fabricated FAPbBr3 nanocrystals via ligand compensation with n-octylphosphonic acid

2020 ◽  
Vol 8 (29) ◽  
pp. 9936-9944 ◽  
Author(s):  
Yanan Wu ◽  
Lihui Liu ◽  
Wei Wang ◽  
Wenzhu Zhang ◽  
Hongtao Yu ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Light Emitting ◽  
Perovskite Nanocrystals ◽  
Device Efficiency ◽  
Improved Stability ◽  
And Performance ◽  
Enhanced Stability

Dual ligands are introduced for the in situ fabrication of perovskite nanocrystals, leading to higher crystallinity, improved stability and device efficiency.

51.2: Invited Paper: Efficient Light‐emitting Diodes Based on In‐situ Fabricated Perovskite Nanocrystals

2019 ◽  
Vol 50 (S1) ◽  
pp. 567-567
Author(s):  
Dengbao Han ◽  
Muhammad Imran ◽  
Xin Zhang ◽  
Chenhui Wang ◽  
Shuai Chang ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Light Emitting ◽  
Perovskite Nanocrystals

In-situ Cadmium Surface Passivation of Perovskite Nanocrystals for Blue LEDs

2021 ◽  
Author(s):  
Woo Hyeon Jeong ◽  
Zhongkai Yu ◽  
Luca Gregori ◽  
Jonghee Yang ◽  
Su Ryong Ha ◽  
...  
Keyword(s):  
Blue Light ◽  
Light Emitting Diodes ◽  
Surface Passivation ◽  
Low Cost ◽  
Color Purity ◽  
Next Generation ◽  
Light Emitting ◽  
Perovskite Nanocrystals ◽  
Excellent Color

Next-generation electroluminescent displays require efficient and stable red, green and blue light-emitting diodes (LEDs) with low cost, excellent color purity and flexibility, for which perovskites-based LEDs (PeLEDs) are a promising...

In Situ-Fabricated Perovskite Nanocrystals for Deep-Blue Light-Emitting Diodes

2020 ◽  
Vol 11 (24) ◽  
pp. 10348-10353
Author(s):  
Wenjie Xu ◽  
Ruiqi Ji ◽  
Pinlei Liu ◽  
Lu Cheng ◽  
Lin Zhu ◽  
...  
Keyword(s):  
Blue Light ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Perovskite Nanocrystals ◽  
Deep Blue

scholarly journals Dimension control of in situ fabricated CsPbClBr2 nanocrystal films toward efficient blue light-emitting diodes

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Chenhui Wang ◽  
Dengbao Han ◽  
Junhui Wang ◽  
Yingguo Yang ◽  
Xinyue Liu ◽  
...  
Keyword(s):  
Quantum Well ◽  
Light Emitting Diodes ◽  
Blue Emission ◽  
Light Emitting ◽  
Mixed Ligands ◽  
Dimension Control ◽  
Nanocrystal Films ◽  
Width Distribution ◽  
Quantum Well Width

AbstractIn the field of perovskite light-emitting diodes (PeLEDs), the performance of blue emissive electroluminescence devices lags behind the other counterparts due to the lack of fabrication methodology. Herein, we demonstrate the in situ fabrication of CsPbClBr2 nanocrystal films by using mixed ligands of 2-phenylethanamine bromide (PEABr) and 3,3-diphenylpropylamine bromide (DPPABr). PEABr dominates the formation of quasi-two-dimensional perovskites with small-n domains, while DPPABr induces the formation of large-n domains. Strong blue emission at 470 nm with a photoluminescence quantum yield up to 60% was obtained by mixing the two ligands due to the formation of a narrower quantum-well width distribution. Based on such films, efficient blue PeLEDs with a maximum external quantum efficiency of 8.8% were achieved at 473 nm. Furthermore, we illustrate that the use of dual-ligand with respective tendency of forming small-n and large-n domains is a versatile strategy to achieve narrow quantum-well width distribution for photoluminescence enhancement.

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