Revived interest on yellow-exciton series in Cu2C: An experimental aspect

Study of the 1s orthoexciton luminescence in Cu2O under two-photon excitation

“…One possibility is to create cold excitons initially. The two-photon resonant excitation approach has been accepted as a promising method to generate a cold exciton system [13][14][15][16][17]. In this article, we investigated the spectroscopic properties of excitons in Cu 2 O arising from two-photon excitations under a broad range of experimental conditions.…”

The effect of complexing agents on the oriented growth of electrodeposited microcrystalline cuprous oxide film

“…Cu 2 O has a bandgap of approximately 2.17 eV [1], and the theoretical limit of Cu 2 O's photovoltaic conversion efficiency is about 18% [2]. It was also found that H 2 O can be decomposed into hydrogen and oxygen under visible light in the existence of Cu 2 O [3,4].…”

Anisotropic effective mass of orthoexcitons in Cu2O

“…It is termed the yellow series though it starts in the red (about 610 nm) but reaches out into the yellow (570 nm) with a perfect hydrogenlike P series from n = 2 to n = 12. 4 In a next experimental step forward, two-photon absorption spectroscopy was applied which revealed a fine structure of even-parity excitons (S and D excitons) up to n = 5. 5 By two-photon excitation spectroscopy S-D excitons were resolved up to n = 7.…”

“…5 By two-photon excitation spectroscopy S-D excitons were resolved up to n = 7. 4 Up to then the 1S exciton was assumed to consist of a triply degenarate orthoexciton state and a single paraexciton as expected from symmetry considerations. 6 Recently it was shown by high-resolution spectroscopy that this degeneracy is lifted by wave-vector-dependent exchange interaction.…”