Nearly 100% Efficiency Enhancement of CH3NH3PbBr3 Perovskite Light-Emitting Diodes by Utilizing Plasmonic Au Nanoparticles

Ping Chen; Ziyang Xiong; Xiaoyan Wu; Ming Shao; Yan Meng; Zu-Hong Xiong; Chunhong Gao

doi:10.1021/acs.jpclett.7b01562

Nearly 100% Efficiency Enhancement of CH₃NH₃PbBr₃ Perovskite Light-Emitting Diodes by Utilizing Plasmonic Au Nanoparticles

J Phys Chem Lett. 2017 Sep 7;8(17):3961-3969. doi: 10.1021/acs.jpclett.7b01562. Epub 2017 Aug 10.

Authors

Ping Chen¹, Ziyang Xiong¹, Xiaoyan Wu², Ming Shao³, Yan Meng¹, Zu-Hong Xiong¹, Chunhong Gao¹

Affiliations

¹ School of Physical Science and Technology, MOE Key Laboratory on Luminescence and Real-Time Analysis, Southwest University , Chongqing 400715, China.
² Institute of Fluid Physics, China Academy of Engineering Physics , Mianyang 621900, China.
³ Key Laboratory of Luminescence and Optical Information, Ministry of Education, School of Science, Beijing Jiaotong University , Beijing 100044, China.

PMID: 28786674
DOI: 10.1021/acs.jpclett.7b01562

Abstract

Organic-inorganic hybrid perovskites have drawn considerable attention due to their great potentials in lighting and displaying. Despite great progress being demonstrated in perovskites light-emitting diodes (PeLEDs), the commercialization of PeLEDs was still limited by their low efficiencies and poor device stabilities. Utilizing the metallic nanoparticles was a feasible way to further improve the efficiencies of PeLEDs. Herein, substantially enhanced electroluminescent performance of CH₃NH₃PbBr₃-based PeLEDs were first demonstrated by incorporating plasmonic gold nanoparticles (Au NPs) into the hole injection layer of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS). Compared to the reference device without Au NPs, 109% enhancement in maximum luminance and 97% enhancement in maximum EQE were achieved upon 9 vol % Au NPs doping. Such enhancements can be ascribed to the localized surface plasmon resonance between Au NPs and CH₃NH₃PbBr₃ excitons, as well as the enhanced electrical conductivity of modified PEDOT:PSS. Our studies indicated great potential of Au NPs in developing highly efficient PeLEDs.