Journal
PHYSICAL REVIEW B
Volume 81, Issue 8, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.81.081303
Keywords
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Funding
- United Kingdom Engineering and Physical Sciences Research Council [EP/E036287/1]
- Northwest Science Fund (NWDA)
- EPSRC [EP/F04772X/1, EP/E036287/1] Funding Source: UKRI
- STFC [ST/G008248/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/E036287/1, EP/F04772X/1] Funding Source: researchfish
- Science and Technology Facilities Council [ST/G008248/1] Funding Source: researchfish
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Efficient carrier multiplication in InP nanoparticles is reported; ultrafast transient absorption measurements at the band edge were used to determine the number of excitons per photoexcited nanoparticle for a range of both excitation fluences and photon energies. At photon energies greater than 2.1 +/- 0.2 times the band gap, an average of more than 1 exciton per photoexcited nanoparticle was found even in the limit of vanishing fluence. The average number of excitons generated by an absorbed photon was measured to be 1.18 +/- 0.03 for excitation photons with energies 2.6 times the band gap.
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