气候变化领域集成服务门户(CCPortal): Probing buried recombination pathways in perovskite structures using 3D photoluminescence tomography

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DOI	10.1039/c8ee00928g
	Probing buried recombination pathways in perovskite structures using 3D photoluminescence tomography
	Stavrakas C.; Zhumekenov A.A.; Brenes R.; Abdi-Jalebi M.; Bulović V.; Bakr O.M.; Barnard E.S.; Stranks S.D.
发表日期	2018
ISSN	17545692
起始页码	2846
结束页码	2852
卷号	11 期号:10
英文摘要	Perovskite solar cells and light-emission devices are yet to achieve their full potential owing in part to microscale inhomogeneities and defects that act as non-radiative loss pathways. These sites have been revealed using local photoluminescence mapping techniques but the short absorption depth of photons with energies above the bandgap means that conventional one-photon excitation primarily probes the surface recombination. Here, we use two-photon time-resolved confocal photoluminescence microscopy to explore the surface and bulk recombination properties of methylammonium lead halide perovskite structures. By acquiring 2D maps at different depths, we form 3D photoluminescence tomography images to visualise the charge carrier recombination kinetics. The technique unveils buried recombination pathways in both thin film and micro-crystal structures that aren't captured in conventional one-photon mapping experiments. Specifically, we reveal that light-induced passivation approaches are primarily surface-sensitive and that nominal single crystals still contain heterogeneous defects that impact charge-carrier recombination. Our work opens a new route to sensitively probe defects and associated non-radiative processes in perovskites, highlighting additional loss pathways in these materials that will need to be addressed through improved sample processing or passivation treatments. © 2018 The Royal Society of Chemistry.
英文关键词	Charge carriers; Lead compounds; Light; Mapping; Passivation; Perovskite; Photoluminescence; Photons; Probes; Single crystals; Solar cells; Tomography; Charge carrier recombination; Confocal photoluminescences; Light emission devices; One photon excitations; Passivation treatment; Perovskite structures; Photoluminescence mapping; Surface recombinations; Perovskite solar cells; fuel cell; inhomogeneity; instrumentation; kinetics; light effect; luminescence; perovskite
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/190102
作者单位	Cavendish Laboratory, JJ Thomson Avenue, Cambridge, CB3 0HE, United Kingdom; Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia; Research Laboratory of Electronics, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, United States; Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
推荐引用方式 GB/T 7714	Stavrakas C.,Zhumekenov A.A.,Brenes R.,et al. Probing buried recombination pathways in perovskite structures using 3D photoluminescence tomography[J],2018,11(10).
APA	Stavrakas C..,Zhumekenov A.A..,Brenes R..,Abdi-Jalebi M..,Bulović V..,...&Stranks S.D..(2018).Probing buried recombination pathways in perovskite structures using 3D photoluminescence tomography.Energy & Environmental Science,11(10).
MLA	Stavrakas C.,et al."Probing buried recombination pathways in perovskite structures using 3D photoluminescence tomography".Energy & Environmental Science 11.10(2018).