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Efficient recycling of trapped energies for dual-emission in Mn-doped perovskite nanocrystals
Qi Wei1; Mingjie Li2; Zhipeng Zhang1; Jia Guo1; Guichuan Xing3; Tze Chien Sum2; Wei Huang1,4
Source PublicationNano Energy

Doping impurity into semiconductor nanocrystals (NCs) is able to create novel optical, electronic, and magnetic functionalities. Recently, dual-emissions from Mn-doped lead chloride perovskites NCs have attracted much attention. However, the mechanisms of doping and energy-transfer to Mn ions of the perovskite NCs are still unclear. In this work, through the newly-developed post-treatment methods, it is found that excess Cl-can boost the Mn-emission due to the efficient ion diffusion and exchanges during Mn-doping processes. Importantly, a clear slow energy accumulation in the Mn dopants with time constant of similar to 200 ns is revealed from time-resolved photoluminescence (PL) measurements. Together with the doping insensitive band edge PL, these results indicate that the Mn dopants should snatch the energy from non-radiative trap states rather than from band states, which implies an efficient recycling of trapped nonradiative energy for luminescence by the dopants. The developed efficient doping method and proposed mechanism of energy transfer would provide unique insights into the mechanisms of doping. Moreover, fundamental investigations on nanostructure and optical properties are expected to increase its potential in electronic or magnetic applications.

KeywordPerovskite Dual-emission Semiconductor Nanocrystals Doped Nanocrystals
URLView the original
Indexed BySCI
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000440682100078
The Source to ArticleWOS
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Cited Times [WOS]:14   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionInstitute of Applied Physics and Materials Engineering
Corresponding AuthorGuichuan Xing; Tze Chien Sum; Wei Huang
Affiliation1.Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China
2.Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University (NTU), 21 Nanyang Link, 637371 Singapore, Singapore
3.Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, Macau, China
4.Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, Shaanxi 710072, China
Corresponding Author AffilicationInstitute of Applied Physics and Materials Engineering
Recommended Citation
GB/T 7714
Qi Wei,Mingjie Li,Zhipeng Zhang,et al. Efficient recycling of trapped energies for dual-emission in Mn-doped perovskite nanocrystals[J]. Nano Energy,2018,51:704-710.
APA Qi Wei.,Mingjie Li.,Zhipeng Zhang.,Jia Guo.,Guichuan Xing.,...&Wei Huang.(2018).Efficient recycling of trapped energies for dual-emission in Mn-doped perovskite nanocrystals.Nano Energy,51,704-710.
MLA Qi Wei,et al."Efficient recycling of trapped energies for dual-emission in Mn-doped perovskite nanocrystals".Nano Energy 51(2018):704-710.
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