TY - JOUR
T1 - Optical and Physical Probing of Thermal Processes in Semiconductor and Plasmonic Nanocrystals
AU - Diroll, Benjamin T.
AU - Kirschner, Matthew S.
AU - Guo, Peijun
AU - Schaller, Richard D.
PY - 2019/6/14
Y1 - 2019/6/14
N2 - This article reviews thermal properties of semiconductor and emergent plasmonic nanomaterials, focusing on mechanisms through which hot carriers and phonons are produced and dissipated as well as the related impacts on optoelectronic properties. Elevated equilibrium temperatures, of particular relevance for implementation of nanomaterials in devices, affect absorptive and radiative transitions as well as emission efficiency that can present reversible and irreversible changes with temperature. In noble metal or doped semiconductor/insulator nanomaterials, hot carriers and lattice heating can substantially influence localized surface plasmon resonances and yield large ultrafast changes in transmission or strongly oscillatory coherences. Transient optical and diffraction characterizations enable nonequilibrium investigations of phonon dynamics and cooling such as lattice expansion and crystal phase stability. Timescales of nanoparticle thermalization with surroundings and transport of heat within films of such materials are also discussed.
AB - This article reviews thermal properties of semiconductor and emergent plasmonic nanomaterials, focusing on mechanisms through which hot carriers and phonons are produced and dissipated as well as the related impacts on optoelectronic properties. Elevated equilibrium temperatures, of particular relevance for implementation of nanomaterials in devices, affect absorptive and radiative transitions as well as emission efficiency that can present reversible and irreversible changes with temperature. In noble metal or doped semiconductor/insulator nanomaterials, hot carriers and lattice heating can substantially influence localized surface plasmon resonances and yield large ultrafast changes in transmission or strongly oscillatory coherences. Transient optical and diffraction characterizations enable nonequilibrium investigations of phonon dynamics and cooling such as lattice expansion and crystal phase stability. Timescales of nanoparticle thermalization with surroundings and transport of heat within films of such materials are also discussed.
KW - Optical probe
KW - Phonon dynamics
KW - Photoluminescence
KW - Plasmon
KW - Semiconductor nanocrystal
KW - Thermal excitation
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U2 - 10.1146/annurev-physchem-042018-052639
DO - 10.1146/annurev-physchem-042018-052639
M3 - Review article
C2 - 31112459
AN - SCOPUS:85067191004
VL - 70
SP - 353
EP - 377
JO - Annual Review of Physical Chemistry
JF - Annual Review of Physical Chemistry
SN - 0066-426X
ER -