Direct observation of mixed-parity excited states in surface-passivated PbS nanocrystals

M J FERNEE; A WATT; J WARNER

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Direct observation of mixed-parity excited states in surface-passivated PbS nanocrystals

机译：直接观察表面钝化的PbS纳米晶体中混合奇偶激发态

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Photoluminescent emission is observed from surface-passivated PbS nanocrystals following the two-photon excitation of high-energy excitonic states. The emission appears directly at the excitation energy with no detectable Stokes-shift for a wide range of excitation energies. The observation of direct emission from states excited by two-photon absorption indicates that the parity of the excited states of surface-passivated PbS nanocrystals is partially mixed.

机译：在高能激子态的双光子激发之后，从表面钝化的PbS纳米晶体中观察到光致发光。发射直接出现在激发能上，而对于大范围的激发能都没有可检测到的斯托克斯位移。从双光子吸收激发态直接发射的观察表明，表面钝化的PbS纳米晶体的激发态奇偶性部分混合。

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《Nanotechnology》 |2004年第9期|共5页
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M J FERNEE; A WATT; J WARNER;
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Direct observation of mixed-parity excited states in surface-passivated PbS nanocrystals

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