期刊
NANOTECHNOLOGY
卷 29, 期 17, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/aaaf13
关键词
electrode quenching; CsPbBr3; perovskite light-emitting diodes; Au nanoparticles; surface plasmon resonance
资金
- National Natural Science Foundation (NSF) of China [11504300, 11374242]
- NSFA of China [U1630125]
- Fundamental Research Funds for the Central Universities [XDJK2017D140]
Compared to organic-inorganic hybrid metal halide perovskites, all-inorganic cesium lead halides (e.g, CsPbBr3) hold greater promise in being emissive materials for light-emitting diodes owing to their superior optoelectronic properties as well as their higher stabilities. However, there is still considerable potential for breakthroughs in the current efficiency of CsPbBr3 perovskite light-emitting diodes (PeLEDs). Electrode quenching is one of the main problems limiting the current efficiency of PeLEDs when poly(3,4-ethylenedioxythiophene): poly (styrenesulfonate) (PEDOT: PSS) is used as the hole injection layer. In this work, electrode quenching control was realized via incorporating Au NPs into PEDOT:PSS. As a result, the CsPbBr3 PeLEDs realized an improvement in maximum luminescence ranging from similar to 2348 to similar to 7660 cd m(-2) (similar to 226% enhancement) and current efficiency from 1.65 to 3.08 cd A(-1) (similar to 86% enhancement). Such substantial enhancement of the electroluminescent performance can be attributed to effective electrode quenching control at the PEDOT:PSS/CsPbBr3 perovskite interface via the combined effects of local surface plasma resonance coupling and enhanced hole transportation in the PEDOT:PSS layer by Au nanoparticles.
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