Ambient-Processed, Additive-Assisted CsPbBr3 Perovskite Light-Emitting Diodes with Colloidal NiOx Nanoparticles for Efficient Hole Transporting

Coatings

Chun-Yuan Huang¹  Chih-Chiang Yang²  Sheng-Po Chang³  Zi-Hao Wang³  ArjunG. Ansay⁴ 

[1] Department of Applied Science, National Taitung University, Taitung 950, Taiwan;Green Energy Technology Research Center, Kun Shan University, Yongkang 710, Taiwan;Institute of Microelectronics & Department of Electrical Engineering, Department of Photonics, Advanced Optoelectronic Technology Center, National Cheng Kung University, Tainan 70101, Taiwan;Integrated Research and Training Center, Technological University of the Philippines, Manila 1004, Philippines;

关键词: inorganic lead halide perovskites;    colloidal NiO_x nanoparticles;    perovskite light-emitting diodes (PeLEDs);    ambient-process;    organic additives;   

DOI  :  10.3390/coatings10040336

来源: DOAJ

【 摘 要 】

In this study, the electrically driven perovskite light-emitting diodes (PeLEDs) were investigated by hybridizing the organic polyethylene oxide, 1,3,5-tris (N-phenylbenzimiazole-2-yl) benzene (TPBi), and bis(3,5-difluoro-2-(2-pyridyl)phenyl-(2-carboxypyridyl) iridium III (FIrpic) with CsPbBr₃ in the emission layer and adopting the colloidal NiO_x nanoparticle (NP) hole transport layer. The synthesized NiO_x NPs, having an average size of ~5 nm, can be spin-coated to become a smooth and close-packed film on the indium–tin–oxide anode. The NiO_x NP layer possesses an overall transmittance of ~80% at 520 nm, which is about the peak position of electroluminescence (EL) spectra of CsPbBr₃ emission layer. The coating procedures of NiO_x NP and CsPbBr₃ layers were carried out in ambient air. The novel PeLED turned on at 2.4 V and emitted bright EL of 4456 cd/m² at 7 V, indicating the remarkable nonradiative-related defect elimination by organic additive addition and significant charge balance achieved by the NiO_x NP layer.

【 授权许可】

Unknown