Bidentate Ligand-Passivated CsPbI3 Perovskite Nanocrystals for Stable Near-Unity Photoluminescence Quantum Yield and Efficient Red Light-Emitting Diodes | Zendy

Jun Pan | Zendy; Yuequn Shang | Zendy; Jun Yin | Zendy; Michele De Bastiani | Zendy; Wei Peng | Zendy; İbrahim Dursun | Zendy; Lutfan Sinatra | Zendy; Ahmed M. ElZohry | Zendy; Mohamed Nejib Hedhili | Zendy; AbdulHamid Emwas | Zendy; Omar F. Mohammed | Zendy; Zhijun Ning | Zendy; Osman M. Bakr | Zendy

Open Access

Bidentate Ligand-Passivated CsPbI₃ Perovskite Nanocrystals for Stable Near-Unity Photoluminescence Quantum Yield and Efficient Red Light-Emitting Diodes

Author(s) -

Jun Pan,

Yuequn Shang,

Jun Yin,

Michele De Bastiani,

Wei Peng,

İbrahim Dursun,

Lutfan Sinatra,

Ahmed M. ElZohry,

Mohamed Nejib Hedhili,

AbdulHamid Emwas,

Omar F. Mohammed,

Zhijun Ning,

Osman M. Bakr

Publication year - 2017

Publication title -

journal of the american chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 7.115

H-Index - 612

eISSN - 1520-5126

pISSN - 0002-7863

DOI - 10.1021/jacs.7b10647

Subject(s) - quantum yield , photoluminescence , passivation , chemistry , perovskite (structure) , oleylamine , light emitting diode , nanocrystal , optoelectronics , diode , denticity , quantum efficiency , yield (engineering) , ligand (biochemistry) , nanotechnology , materials science , crystallography , layer (electronics) , optics , fluorescence , crystal structure , organic chemistry , physics , biochemistry , receptor , metallurgy

Although halide perovskite nanocrystals (NCs) are promising materials for optoelectronic devices, they suffer severely from chemical and phase instabilities. Moreover, the common capping ligands like oleic acid and oleylamine that encapsulate the NCs will form an insulating layer, precluding their utility in optoelectronic devices. To overcome these limitations, we develop a postsynthesis passivation process for CsPbI 3 NCs by using a bidentate ligand, namely 2,2'-iminodibenzoic acid. Our passivated NCs exhibit narrow red photoluminescence with exceptional quantum yield (close to unity) and substantially improved stability. The passivated NCs enabled us to realize red light-emitting diodes (LEDs) with 5.02% external quantum efficiency and 748 cd/m 2 luminance, surpassing by far LEDs made from the nonpassivated NCs.

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