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- W2016409617 abstract "We investigated the low temperature luminescence spectra of 6H and 4H SiC doped with nitrogen and aluminium. The investigation involved photoluminescence spectra, time-resolved cathodoluminescence spectra and decay measurements. From the observation of (i) a detailed line structure in the photoluminescence spectra, (ii) a narrowing of the bands in the time-resolved spectra with increasing delay time and (iii) a non-exponential decay, it is concluded that the spectra characteristic for material doped with N and Al are due to donor-acceptor pair recombination. From the decay measurements the parameter Wmax in the relation describing the transition probability of the pairs is estimated to be 3x105 s-1. It is further concluded, that the spectra of both polytypes involve two zero-phonon bands and their phonon replicas. We show that an interpretation in terms of N as the donor and Al as the acceptor is compatible with existing information about these impurities. Comparison of the spectral data with other information suggests that the existence of two zero-phonon bands is due to the difference in ionization energy between N donors on “hexagonal” and “cubic” sites respectively." @default.
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- W2016409617 date "1973-09-01" @default.
- W2016409617 modified "2023-10-09" @default.
- W2016409617 title "Donor-acceptor pair spectra in 6H and 4H SiC doped with nitrogen and aluminium" @default.
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- W2016409617 doi "https://doi.org/10.1016/0022-2313(73)90032-x" @default.
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