气候变化领域集成服务门户(CCPortal): Large cation ethylammonium incorporated perovskite for efficient and spectra stable blue light-emitting diodes

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DOI	10.1038/s41467-020-17943-6
	Large cation ethylammonium incorporated perovskite for efficient and spectra stable blue light-emitting diodes
	Chu Z.; Zhao Y.; Ma F.; Zhang C.-X.; Deng H.; Gao F.; Ye Q.; Meng J.; Yin Z.; Zhang X.; You J.
发表日期	2020
ISSN	20411723
卷号	11 期号:1
英文摘要	Perovskite light-emitting diodes (PeLEDs) have showed significant progress in recent years; the external quantum efficiency (EQE) of electroluminescence in green and red regions has exceeded 20%, but the efficiency in blue lags far behind. Here, a large cation CH3CH2NH2+ is added in PEA2(CsPbBr3)2PbBr4 perovskite to decrease the Pb–Br orbit coupling and increase the bandgap for blue emission. X-ray diffraction and nuclear magnetic resonance results confirmed that the EA has successfully replaced Cs+ cations to form PEA2(Cs1-xEAxPbBr3)2PbBr4. This method modulates the photoluminescence from the green region (508 nm) into blue (466 nm), and over 70% photoluminescence quantum yield in blue is obtained. In addition, the emission spectra is stable under light and thermal stress. With configuration of PeLEDs with 60% EABr, as high as 12.1% EQE of sky-blue electroluminescence located at 488 nm has been demonstrated, which will pave the way for the full color display for the PeLEDs. © 2020, The Author(s).
scopus关键词	dimethyl sulfoxide; guanidine; hydroxyapatite; methacrylic acid methyl ester; perovskite; tetrylammonium; ammonium; cation; emission; energy efficiency; equipment; nuclear magnetic resonance; perovskite; quantitative analysis; X-ray diffraction; absorption; Article; atomic force microscopy; bandgap; channel gating; chemical structure; conduction band; controlled study; crystal structure; current density; density functional theory; electric potential; electrophysiology; illumination; impedance spectroscopy; light transmission; luminescence; molecular size; nanofabrication; nonhuman; photoluminescence; physical parameters; proton nuclear magnetic resonance; quantum yield; refraction index; scanning electron microscopy; structure analysis; two-dimensional imaging; ultraviolet photoelectron spectroscopy; ultraviolet radiation; ultraviolet visible spectroscopy; X ray diffraction
来源期刊	Nature Communications
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/176739
作者单位	Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China; State Key Lab Superlattices & Microstruct, Beijing 100083, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China
推荐引用方式 GB/T 7714	Chu Z.,Zhao Y.,Ma F.,et al. Large cation ethylammonium incorporated perovskite for efficient and spectra stable blue light-emitting diodes[J],2020,11(1).
APA	Chu Z..,Zhao Y..,Ma F..,Zhang C.-X..,Deng H..,...&You J..(2020).Large cation ethylammonium incorporated perovskite for efficient and spectra stable blue light-emitting diodes.Nature Communications,11(1).
MLA	Chu Z.,et al."Large cation ethylammonium incorporated perovskite for efficient and spectra stable blue light-emitting diodes".Nature Communications 11.1(2020).