Quasi-two-dimensional Cs0.9Rb0.1PbBr2.1Cl0.9:PEABr sky-blue light-emitting diodes by potassium bromide doping engineering and interface modification in nickel oxide

Chang, Yi-Tsung; Zhang, Lingun; Lai, Mu-Jen; Liu, Po-An; Chen, Lung-Chien

doi:10.1016/j.mssp.2023.108030

Materials Science in Semiconductor Processing

2024

DOI: 10.1016/j.mssp.2023.108030

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Quasi-two-dimensional Cs0.9Rb0.1PbBr2.1Cl0.9:PEABr sky-blue light-emitting diodes by potassium bromide doping engineering and interface modification in nickel oxide

Yi-Tsung Chang,

Lingun Zhang,

Mu-Jen Lai

et al.

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Tailoring Nio_x/Perovskite Interface via a Multifunctional Self‐Assembled Molecule for High‐Performance Blue Perovskite Light‐Emitting Diodes

Ji,

Ren,

Chen

et al. 2024

Small Structures

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Nickel oxide (NiOx) serves as one of the most promising hole transport materials for perovskite light‐emitting diodes (PeLEDs). However, only moderate PeLED performances have been reported on the pristine NiOx layer due to insufficient hole injection, interfacial exciton quenching, and poor perovskite quality. Herein, a multifunctional molecule of 3‐mercapto‐1‐propanesulfonate (MPS) is demonstrated to successfully tailor the NiOx–perovskite heterogenous interface by addressing the above issues. In detail, the large binding energy between mercapto sulfur and nickel induces preferential self‐assembly of the mercapto group on the NiOx surface, which simultaneously enlarges the NiOx work function by the formation of interfacial dipole and suppresses the trap‐assisted exciton quenching by the passivation of the oxygen vacancies. Meanwhile, the self‐assembled MPS on NiOx also favors high‐quality perovskite films with good morphology, high crystallinity, and reduced defects for efficient carrier radiative recombination. As a result, blue PeLEDs show a remarkable efficiency of 10.4%, representing one of the highest efficiencies for NiOx‐based blue PeLEDs, as well as a very low turn‐on voltage of 2.8 V. Consequently, this work contributes to an efficient approach to tailor the NiOx–perovskite interface for highly efficient blue PeLEDs.

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Tailoring Nio_x/Perovskite Interface via a Multifunctional Self‐Assembled Molecule for High‐Performance Blue Perovskite Light‐Emitting Diodes

Ji,

Ren,

Chen

et al. 2024

Small Structures

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Quasi-two-dimensional Cs0.9Rb0.1PbBr2.1Cl0.9:PEABr sky-blue light-emitting diodes by potassium bromide doping engineering and interface modification in nickel oxide

Cited by 1 publication

References 36 publications

Tailoring Nio_x/Perovskite Interface via a Multifunctional Self‐Assembled Molecule for High‐Performance Blue Perovskite Light‐Emitting Diodes

Tailoring Nio_x/Perovskite Interface via a Multifunctional Self‐Assembled Molecule for High‐Performance Blue Perovskite Light‐Emitting Diodes

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Quasi-two-dimensional Cs0.9Rb0.1PbBr2.1Cl0.9:PEABr sky-blue light-emitting diodes by potassium bromide doping engineering and interface modification in nickel oxide

Cited by 1 publication

References 36 publications

Tailoring Niox/Perovskite Interface via a Multifunctional Self‐Assembled Molecule for High‐Performance Blue Perovskite Light‐Emitting Diodes

Tailoring Niox/Perovskite Interface via a Multifunctional Self‐Assembled Molecule for High‐Performance Blue Perovskite Light‐Emitting Diodes

Contact Info

Product

Resources

About

Tailoring Nio_x/Perovskite Interface via a Multifunctional Self‐Assembled Molecule for High‐Performance Blue Perovskite Light‐Emitting Diodes

Tailoring Nio_x/Perovskite Interface via a Multifunctional Self‐Assembled Molecule for High‐Performance Blue Perovskite Light‐Emitting Diodes