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- W2047568851 abstract "We have studied optical properties of an inorganic-organic layered lead iodide semiconductor doped with bismuth ions $({mathrm{Bi}}^{3+})$. A new absorption band was observed at $2.15phantom{rule{0.3em}{0ex}}mathrm{eV}$ that is by $0.21phantom{rule{0.3em}{0ex}}mathrm{eV}$ lower than two-dimensional $1s$ excitons $(2.36phantom{rule{0.3em}{0ex}}mathrm{eV})$ and is assigned to excitons bound to the bismuth ions. In the photoluminescence spectra with high excitation density $(ensuremath{sim}0.4phantom{rule{0.3em}{0ex}}mathrm{MW}∕{mathrm{cm}}^{2})$, a novel emission band was observed at the energy of $2.51phantom{rule{0.3em}{0ex}}mathrm{eV}$ that is by $0.15phantom{rule{0.3em}{0ex}}mathrm{eV}$ higher than the exciton resonance, and is attributed to biexcitons bound to the bismuth ions. On the basis of the experimental results, the binding energies of the bismuth-bound exciton and biexciton were estimated approximately as 210 and $10phantom{rule{0.3em}{0ex}}mathrm{meV}$, respectively. It is found that the binding energy of the positive-ion $({mathrm{Bi}}^{3+})$ bound biexciton is by far smaller than that of the corresponding bound exciton. The much lower stability of the positive-ion bound biexciton is discussed." @default.
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- W2047568851 date "2004-11-01" @default.
- W2047568851 modified "2023-09-27" @default.
- W2047568851 title "Excitons and biexcitons bound to a positive ion in a bismuth-doped inorganic-organic layered lead iodide semiconductor" @default.
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- W2047568851 doi "https://doi.org/10.1103/physrevb.70.205330" @default.
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