Journal
NANOMATERIALS
Volume 9, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/nano9020177
Keywords
CsPbBr3; microcrystals; defects; thermally stimulated current; charge transfer
Categories
Funding
- Fondazione CARIFI Bando
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Intrinsic defects in CsPbBr3 microcrystalline films have been studied using thermally stimulated current (TSC) technique in a wide temperature range (100-400 K). Below room temperature, TSC emission is composed by a set of several energy levels, in the range 0.11-0.27 eV, suggesting a quasi-continuum distribution of states with almost constant density. Above room temperature, up to 400 K, the temperature range of interest for solar cells, both dark current and photocurrent, are mainly dominated by energy levels in the range 0.40-0.45 eV. Even if measured trap densities are high, in the range 10(13)-10(16) cm(-3), the very small capture cross-sections, about 10(-26) m(2), agree with the high defect tolerance characterizing this material.
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