气候变化领域集成服务门户(CCPortal): Energy transfer in (PEA)2FAn−1PbnBr3n+1quasi-2D perovskites

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DOI	10.1039/d1tc00422k
	Energy transfer in (PEA)2FAn−1PbnBr3n+1quasi-2D perovskites
	Litvinas D.; Aleksiejūnas R.; Ščajev P.; Baronas P.; Soriūtė V.; Qin C.; Fujihara T.; Matsushima T.; Adachi C.; Juršėnas S.
发表日期	2021
ISSN	20507534
起始页码	4782
结束页码	4791
卷号	9 期号:14
英文摘要	Quasi-two dimensional perovskites demonstrate unique excitonic properties due to their multilayer structure making them attractive for various optoelectronic applications. However, the thickness of individual perovskite sheets in wet cast quasi-2D layers tends to randomly fluctuate giving rise to a specific type of disorder, which impacts on the carrier dynamics and is rather complex and remains understudied. Here, we present a study of carrier transport in Ruddlesden-Popper type (PEA)2FAn−1PbnBr3n+1layers of ordernfrom one to four, and in the bulk FAPbBr3layer. We use a light induced transient grating technique to measure the carrier diffusion coefficient directly, and the transient absorptionviaphotoluminescence to investigate the energy relaxation pathways. We observe two distinct energy transfer processes on different time scales. Fast energy funnelling in thicker (n≥ 3) layers is observed up to 10 ps after excitation; we attribute this to short-distance transfer of excitons to neighbouring perovskite sheets of higher order. On the longer timescale of hundreds of picoseconds, carrier in-plane transport is governed by exciton diffusion inn= 1 and 2 layers and by free carrier plasma in thicker ones. Within the carrier density range of (0.5-4) × 1019cm−3, the exciton diffusion coefficient inn= 1, 2 increases slowly from 1 to 2.8 cm2s−1, whereas in thicker layers the dependence is much stronger and the diffusivity grows from 0.09 to 1.9 cm2s−1. We explain these dependencies by a higher structural order in the thinner samples and the stronger localization of carriers in thicker ones. Also, amplified spontaneous emission (ASE) is observed in thicker (n≥ 3) layers in electron-hole plasma, as evidenced by the typical ASE line redshift upon excitation. © The Royal Society of Chemistry 2021.
scopus关键词	D region; Energy transfer; Excitons; Perovskite; Amplified spontaneous emissions; Different time scale; Electron hole plasma; Energy transfer process; Excitonic properties; Light-induced transient grating technique; Multilayer structures; Optoelectronic applications; Diffusion
来源期刊	Journal of Materials Chemistry C
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/177200
作者单位	Institute of Photonics and Nanotechnology, Faculty of Physics, Vilnius University, Sauletekio Ave. 3, Vilnius, LT-10257, Lithuania; State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry (CIAC), Chinese Academy of Science, 5625 Renmin Street, Changchun, 130022, China; Innovative Organic Device Laboratory, Institute of Systems, Information Technologies and Nanotechnologies (ISIT), Fukuoka Industry-Academia Symphonicity (FiaS) 2-110, 4-1 Kyudai-shinmachi, Nishi, Fukuoka 819-0388, Japan; International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan; Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan; Adachi Molecular Exciton Engineering Project, Japan Science and Technology Agency (JST), ERATO, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
推荐引用方式 GB/T 7714	Litvinas D.,Aleksiejūnas R.,Ščajev P.,et al. Energy transfer in (PEA)2FAn−1PbnBr3n+1quasi-2D perovskites[J],2021,9(14).
APA	Litvinas D..,Aleksiejūnas R..,Ščajev P..,Baronas P..,Soriūtė V..,...&Juršėnas S..(2021).Energy transfer in (PEA)2FAn−1PbnBr3n+1quasi-2D perovskites.Journal of Materials Chemistry C,9(14).
MLA	Litvinas D.,et al."Energy transfer in (PEA)2FAn−1PbnBr3n+1quasi-2D perovskites".Journal of Materials Chemistry C 9.14(2021).