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Highly Efficient and Anomalous Charge Transfer in van der Waals Trilayer Semiconductors

Overview of attention for article published in Nano Letters, February 2017
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About this Attention Score

  • In the top 5% of all research outputs scored by Altmetric
  • High Attention Score compared to outputs of the same age (96th percentile)
  • High Attention Score compared to outputs of the same age and source (85th percentile)

Mentioned by

news
8 news outlets
blogs
1 blog
twitter
1 tweeter
facebook
5 Facebook pages
googleplus
1 Google+ user
reddit
1 Redditor

Citations

dimensions_citation
15 Dimensions

Readers on

mendeley
70 Mendeley
Title
Highly Efficient and Anomalous Charge Transfer in van der Waals Trilayer Semiconductors
Published in
Nano Letters, February 2017
DOI 10.1021/acs.nanolett.6b04815
Pubmed ID
Authors

Frank Ceballos, Ming-Gang Ju, Samuel D. Lane, Xiao Cheng Zeng, Hui Zhao

Abstract

Two dimensional materials, such as graphene and monolayer transition metal dichalcogenides, allow the fabrication of multilayer structures without lattice matching restriction. A central issue in developing such artificial materials is to understand and control the interlayer electron transfer process, which plays a key role in harvesting their emergent properties. Recent photoluminescence and transient absorption measurements revealed that the electron transfer in hetero-bilayers occurs on ultrafast time scales. However, there is still a lack of fundamental understanding on how this process can be so efficient without chemical bonds and conventional band transport. Here we show evidence suggesting the coherent nature of such interlayer electron transfer. In a trilayer of MoS2-WS2-MoSe2, electrons excited in MoSe2 transfer to MoS2 in about one picosecond. Surprisingly, these electrons do not populate the middle WS2 layer during this process. Calculations showed the coherent nature of the charge transfer and reproduced the measured electron transfer time. The hole transfer from MoS2 to MoSe2 is also found to be efficient and ultrafast. The separation of electrons and holes extends their lifetimes to more than one nanosecond, suggesting potential applications of such multilayer structures in optoelectronics.

Twitter Demographics

The data shown below were collected from the profile of 1 tweeter who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 70 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
United States 1 1%
Unknown 69 99%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 24 34%
Researcher 11 16%
Student > Master 11 16%
Unspecified 6 9%
Student > Bachelor 4 6%
Other 14 20%
Readers by discipline Count As %
Physics and Astronomy 19 27%
Materials Science 17 24%
Chemistry 12 17%
Engineering 10 14%
Unspecified 10 14%
Other 2 3%

Attention Score in Context

This research output has an Altmetric Attention Score of 75. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 25 March 2017.
All research outputs
#149,006
of 9,243,111 outputs
Outputs from Nano Letters
#182
of 4,710 outputs
Outputs of similar age
#9,128
of 254,789 outputs
Outputs of similar age from Nano Letters
#14
of 98 outputs
Altmetric has tracked 9,243,111 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 98th percentile: it's in the top 5% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 4,710 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 12.4. This one has done particularly well, scoring higher than 96% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 254,789 tracked outputs that were published within six weeks on either side of this one in any source. This one has done particularly well, scoring higher than 96% of its contemporaries.
We're also able to compare this research output to 98 others from the same source and published within six weeks on either side of this one. This one has done well, scoring higher than 85% of its contemporaries.