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Mendeley readers
Attention Score in Context
| Title |
Efficient optical extraction of hot-carrier energy
|
|---|---|
| Published in |
Nature Communications, August 2014
|
| DOI | 10.1038/ncomms5665 |
| Pubmed ID | |
| Authors |
S. Saeed, E. M. L. D. de Jong, K. Dohnalova, T. Gregorkiewicz |
| Abstract |
Light-induced generation of free charge carriers in semiconductors constitutes the physical basis of photodetection and photovoltaics. To maximize its efficiency, the energy of the photons must be entirely used for this purpose. This is highly challenging owing to the ultrafast thermalization of 'hot' carriers, which are created by absorption of high-energy photons. Thermalization leads to heat generation, and hence efficiency loss. To circumvent this, dedicated schemes such as photovoltaic hot-carrier cells are being explored. Here we consider optical extraction of the excess energy of hot carriers by emission of infrared photons, using erbium ions in combination with silicon nanocrystals. We determine the external quantum yield of the infrared photon generation by the erbium ions, and demonstrate that cooling of the hot carriers induces a steep, step-like, increase in erbium-related external quantum yield by up to a factor of 15 towards higher excitation energies. Finally, we comment on the potential of our findings for future photovoltaics in the form of an optical ultraviolet-to-infrared spectral converter. |
Mendeley readers
The data shown below were compiled from readership statistics for 108 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Netherlands | 1 | <1% |
| Germany | 1 | <1% |
| Argentina | 1 | <1% |
| Brazil | 1 | <1% |
| Unknown | 104 | 96% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 42 | 39% |
| Researcher | 19 | 18% |
| Student > Bachelor | 11 | 10% |
| Student > Master | 10 | 9% |
| Professor | 6 | 6% |
| Other | 7 | 6% |
| Unknown | 13 | 12% |
| Readers by discipline | Count | As % |
|---|---|---|
| Physics and Astronomy | 34 | 31% |
| Engineering | 20 | 19% |
| Materials Science | 15 | 14% |
| Chemistry | 13 | 12% |
| Energy | 4 | 4% |
| Other | 5 | 5% |
| Unknown | 17 | 16% |
Attention Score in Context
This research output has an Altmetric Attention Score of 15. 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 18 August 2014.
All research outputs
#2,098,534
of 22,760,687 outputs
Outputs from Nature Communications
#24,282
of 46,872 outputs
Outputs of similar age
#22,636
of 231,138 outputs
Outputs of similar age from Nature Communications
#299
of 676 outputs
Altmetric has tracked 22,760,687 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 90th percentile: it's in the top 10% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 46,872 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 55.5. This one is in the 48th percentile – i.e., 48% of its peers scored the same or lower than it.
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 231,138 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 90% of its contemporaries.
We're also able to compare this research output to 676 others from the same source and published within six weeks on either side of this one. This one has gotten more attention than average, scoring higher than 55% of its contemporaries.