Next Article in Journal
Co-Doped Porous Carbon/Carbon Nanotube Heterostructures Derived from ZIF-L@ZIF-67 for Efficient Microwave Absorption
Previous Article in Journal
Recovery of Ellagic Acid from Pomegranate Peels with the Aid of Ultrasound-Assisted Alkaline Hydrolysis
Previous Article in Special Issue
A Functional Biological Molecule Restores the PbI2 Residue-Induced Defects in Two-Step Fabricated Perovskites
 
 
Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
Journals
Molecules
Volume 29
Issue 11
10.3390/molecules29112425
molecules-logo
Submit to this Journal Review for this Journal Propose a Special Issue
► Article Menu

Article Menu

share Share announcement Help format_quote Cite question_answer Discuss in SciProfiles
first_page
settings
Order Article Reprints
Font Type:
Arial Georgia Verdana
Font Size:
Aa Aa Aa
Line Spacing:
Column Width:
Background:
Article

Enhanced Efficiency and Stability of Sky Blue Perovskite Light-Emitting Diodes via Introducing Lead Acetate

by
Zequan Zhang
1,
Qiaoli Niu
1,*,
Baoxiang Chai
1,
Junhao Xiong
1,
Yuqing Chen
1,
Wenjin Zeng
1,
Xinwen Peng
2,
Emmanuel Iheanyichukwu Iwuoha
3 and
Ruidong Xia
1,*
1
State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
2
State Key Laboratory of Pulp and Paper Engineering, School of Light Industry and Engineering, South China University of Technology, Guangzhou 510640, China
3
Sensor Lab (University of the Western Cape Sensor Laboratories), 4th Floor Chemical Sciences Building, University of the Western Cape, Robert Sobukwe Road, Bellville, Cape Town 7535, South Africa
*
Authors to whom correspondence should be addressed.
Molecules 2024, 29(11), 2425; https://doi.org/10.3390/molecules29112425
Submission received: 25 April 2024 / Revised: 4 May 2024 / Accepted: 16 May 2024 / Published: 21 May 2024
(This article belongs to the Special Issue Molecular Semiconductors for Organic and Perovskite Solar Cells)
Browse Figures
Versions Notes

Abstract

All-inorganic metal halide perovskite is promising for highly efficient and thermally stable perovskite light-emitting diodes (PeLEDs). However, there is still great room for improvement in the film quality, including low coverage and high trap density, which play a vital role in achieving high-efficiency PeLEDs. In this work, lead acetate (Pb(Ac)2) was introduced into the perovskite precursor solution as an additive. Experimental results show that perovskite films deposited from a one-step anti-solvent free solution process with increased surface coverage and reduced trap density were obtained, leading to enhanced photoluminescence (PL) intensity. More than that, the valence band maximum (VBM) of perovskite films was reduced, bringing about a better energy level matching the work function of the hole-injection layer (HIL) poly (3,4-ethylenedioxythiophene)-poly (styrene sulfonate) (PEDOT: PSS), which is facilitated for the hole injection, leading to a decrease in the turn-on voltage (Vth) of PeLEDs from 3.4 V for the control device to 2.6 V. Finally, the external quantum efficiency (EQE) of the sky blue PeLEDs (at 484 nm) increased from 0.09% to 0.66%. The principles of Pb(Ac)2 were thoroughly investigated by using X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR). This work provides a simple and effective strategy for improving the morphology of perovskite and therefore the performance of PeLEDs.
Keywords: perovskite light-emitting diodes; Pb(Ac)2; defect passivation perovskite light-emitting diodes; Pb(Ac)2; defect passivation

Share and Cite

MDPI and ACS Style

Zhang, Z.; Niu, Q.; Chai, B.; Xiong, J.; Chen, Y.; Zeng, W.; Peng, X.; Iwuoha, E.I.; Xia, R. Enhanced Efficiency and Stability of Sky Blue Perovskite Light-Emitting Diodes via Introducing Lead Acetate. Molecules 2024, 29, 2425. https://doi.org/10.3390/molecules29112425

AMA Style

Zhang Z, Niu Q, Chai B, Xiong J, Chen Y, Zeng W, Peng X, Iwuoha EI, Xia R. Enhanced Efficiency and Stability of Sky Blue Perovskite Light-Emitting Diodes via Introducing Lead Acetate. Molecules. 2024; 29(11):2425. https://doi.org/10.3390/molecules29112425

Chicago/Turabian Style

Zhang, Zequan, Qiaoli Niu, Baoxiang Chai, Junhao Xiong, Yuqing Chen, Wenjin Zeng, Xinwen Peng, Emmanuel Iheanyichukwu Iwuoha, and Ruidong Xia. 2024. "Enhanced Efficiency and Stability of Sky Blue Perovskite Light-Emitting Diodes via Introducing Lead Acetate" Molecules 29, no. 11: 2425. https://doi.org/10.3390/molecules29112425

APA Style

Zhang, Z., Niu, Q., Chai, B., Xiong, J., Chen, Y., Zeng, W., Peng, X., Iwuoha, E. I., & Xia, R. (2024). Enhanced Efficiency and Stability of Sky Blue Perovskite Light-Emitting Diodes via Introducing Lead Acetate. Molecules, 29(11), 2425. https://doi.org/10.3390/molecules29112425

Article Metrics

Back to TopTop