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Issue 2, 2017
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Seeing the invisible plasma with transient phonons in cuprous oxide

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Abstract

The emission of phonons from electron–hole plasma is the primary limit on the efficiency of photovoltaic devices operating above the bandgap. In cuprous oxide (Cu2O) there is no luminescence from electron–hole plasma. Therefore, we searched for optical phonons emitted by energetic charge carriers using phonon-to-exciton upconversion transitions. We found 14 meV phonons with a lifetime of 0.916 ± 0.008 ps and 79 meV phonons that are longer lived and overrepresented. It is surprising that the higher energy phonon has a longer lifetime.

Graphical abstract: Seeing the invisible plasma with transient phonons in cuprous oxide

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Publication details

The article was received on 23 Sep 2016, accepted on 29 Nov 2016 and first published on 12 Dec 2016


Article type: Paper
DOI: 10.1039/C6CP06532E
Citation: Phys. Chem. Chem. Phys., 2017,19, 1151-1157
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    Seeing the invisible plasma with transient phonons in cuprous oxide

    L. Frazer, R. D. Schaller, K. B. Chang, A. Chernatynskiy and K. R. Poeppelmeier, Phys. Chem. Chem. Phys., 2017, 19, 1151
    DOI: 10.1039/C6CP06532E

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