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DOI	10.1039/c8ee00293b
	Self-assembled hierarchical nanostructured perovskites enable highly efficient LEDs: Via an energy cascade
	Chin X.Y.; Perumal A.; Bruno A.; Yantara N.; Veldhuis S.A.; Martínez-Sarti L.; Chandran B.; Chirvony V.; Lo A.S.-Z.; So J.; Soci C.; Grätzel M.; Bolink H.J.; Mathews N.; Mhaisalkar S.G.
发表日期	2018
ISSN	17545692
起始页码	1770
结束页码	1778
卷号	11 期号:7
英文摘要	Metal halide perovskites have established themselves as extraordinary optoelectronic materials, exhibiting promise for applications in large area illumination and displays. However, low luminescence, low efficiencies of the light-emitting diodes (LEDs), and complex preparation methods currently limit further progress towards applications. Here, we report on a new and unique mesoscopic film architecture featuring the self-assembly of 3D formamidinium lead bromide (FAPbBr3) nanocrystals of graded size, coupled with microplatelets of octylammonium lead bromide perovskites, which enables an energy cascade, yielding very high-performance light-emitting diodes with emission in the green spectral region. These hierarchically structured perovskite films exhibit photoluminescence quantum yields of over 80% and LEDs associated with record high efficiencies in excess of 57.6 cd A-1 with an external quantum efficiency above 13%. Additionally, due to low turn-on voltages (∼2.2 V) the LEDs have power efficiencies exceeding 58 lumens per watt, obtained without any light-outcoupling structures. © 2018 The Royal Society of Chemistry.
英文关键词	Lead compounds; Light; Light emitting diodes; Metal halides; Optoelectronic devices; Perovskite; Self assembly; External quantum efficiency; Halide perovskites; Light emitting diode (LEDs); Light outcoupling; Low turn-on voltages; Opto-electronic materials; Photoluminescence quantum yields; Preparation method; Quantum efficiency; bioluminescence; bromide; efficiency measurement; electronic equipment; energy efficiency; perforation; perovskite; three-dimensional modeling
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190213
作者单位	Energy Research Institute at Nanyang Technological University (ERI at N), 50 Nanyang Drive Research Techno Plaza X-Frontier Block, Singapore, 637553, Singapore; Department of Physics, Indian Institute of Science Education and Research (IISER), Berhampur, Odisha, 760010, India; Instituto de Ciencia Molecular, Universidad de Valencia, C/Cat. J. Beltran 2, Paterna, 46980, Spain; School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore; Centre of Disruptive Photonics Technologies, Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore; Laboratory of Photonics and Interfaces, Department of Chemistry and Chemical Engineering, Swiss Federal Institute of Technology, Station 6, Lausanne, 1015, Switzerland
推荐引用方式 GB/T 7714	Chin X.Y.,Perumal A.,Bruno A.,et al. Self-assembled hierarchical nanostructured perovskites enable highly efficient LEDs: Via an energy cascade[J],2018,11(7).
APA	Chin X.Y..,Perumal A..,Bruno A..,Yantara N..,Veldhuis S.A..,...&Mhaisalkar S.G..(2018).Self-assembled hierarchical nanostructured perovskites enable highly efficient LEDs: Via an energy cascade.Energy & Environmental Science,11(7).
MLA	Chin X.Y.,et al."Self-assembled hierarchical nanostructured perovskites enable highly efficient LEDs: Via an energy cascade".Energy & Environmental Science 11.7(2018).