气候变化领域集成服务门户(CCPortal): Efficient Energy Funneling in Quasi-2D Perovskites: From Light Emission to Lasing

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DOI	10.1002/adma.201906571
	Efficient Energy Funneling in Quasi-2D Perovskites: From Light Emission to Lasing
	Lei L.; Seyitliyev D.; Stuard S.; Mendes J.; Dong Q.; Fu X.; Chen Y.-A.; He S.; Yi X.; Zhu L.; Chang C.-H.; Ade H.; Gundogdu K.; So F.
发表日期	2020
ISSN	9359648
卷号	32 期号:16
英文摘要	Quasi-2D Ruddlesden–Popper halide perovskites with a large exciton binding energy, self-assembled quantum wells, and high quantum yield draw attention for optoelectronic device applications. Thin films of these quasi-2D perovskites consist of a mixture of domains having different dimensionality, allowing energy funneling from lower-dimensional nanosheets (high-bandgap domains) to 3D nanocrystals (low-bandgap domains). High-quality quasi-2D perovskite (PEA)2(FA)3Pb4Br13 films are fabricated by solution engineering. Grazing-incidence wide-angle X-ray scattering measurements are conducted to study the crystal orientation, and transient absorption spectroscopy measurements are conducted to study the charge-carrier dynamics. These data show that highly oriented 2D crystal films have a faster energy transfer from the high-bandgap domains to the low-bandgap domains (<0.5 ps) compared to the randomly oriented films. High-performance light-emitting diodes can be realized with these highly oriented 2D films. Finally, amplified spontaneous emission with a low threshold 4.16 µJ cm−2 is achieved and distributed feedback lasers are also demonstrated. These results show that it is important to control the morphology of the quasi-2D films to achieve efficient energy transfer, which is a critical requirement for light-emitting devices. © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
英文关键词	amplified spontaneous emission; distributed-feedback lasers; energy funneling; light-emitting diodes; quasi-2D perovskites
scopus关键词	Absorption spectroscopy; Binding energy; Crystal orientation; Energy gap; Energy transfer; Feedback; Light emitting diodes; Morphology; Perovskite; Perovskite solar cells; Quantum well lasers; Semiconductor quantum wells; Spontaneous emission; Thin films; X ray scattering; Amplified spontaneous emissions; Charge carrier dynamics; Efficient energy transfer; energy funneling; Exciton-binding energy; Quasi-2d; Self-assembled quantum wells; Transient absorption spectroscopies; Distributed feedback lasers
来源期刊	Advanced Materials
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/176941
作者单位	Department of Materials Science and Engineering, Organic and Carbon Electronics Lab (ORaCEL), North Carolina State University, Raleigh, NC 27695, United States; Department of Physics, Organic and Carbon Electronics Lab (ORaCEL), North Carolina State University, Raleigh, NC 27695, United States; Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC 27695, United States
推荐引用方式 GB/T 7714	Lei L.,Seyitliyev D.,Stuard S.,et al. Efficient Energy Funneling in Quasi-2D Perovskites: From Light Emission to Lasing[J],2020,32(16).
APA	Lei L..,Seyitliyev D..,Stuard S..,Mendes J..,Dong Q..,...&So F..(2020).Efficient Energy Funneling in Quasi-2D Perovskites: From Light Emission to Lasing.Advanced Materials,32(16).
MLA	Lei L.,et al."Efficient Energy Funneling in Quasi-2D Perovskites: From Light Emission to Lasing".Advanced Materials 32.16(2020).