Wen-chao Cheng, Tie-qiang Zhang, Yu Zhang. Dielectric Confinement Effect on Calculating the Band Gap of PbSe Quantum Dots[J]. Chinese Journal of Chemical Physics , 2011, 24(2): 162-166. doi: 10.1088/1674-0068/24/02/162-166
Citation: Wen-chao Cheng, Tie-qiang Zhang, Yu Zhang. Dielectric Confinement Effect on Calculating the Band Gap of PbSe Quantum Dots[J]. Chinese Journal of Chemical Physics , 2011, 24(2): 162-166. doi: 10.1088/1674-0068/24/02/162-166

Dielectric Confinement Effect on Calculating the Band Gap of PbSe Quantum Dots

doi: 10.1088/1674-0068/24/02/162-166
Funds:  This work is supported by the National High Tech Re-search and Development Program (No.2007AA03Z112 and No.2007AA06Z112).
  • Received Date: 2010-11-24
  • Considering the dielectric confinement effect on excitonics of PbSe quantum dots (QDs), a correction factor in the wave function was introduced to propose a new band gap calculation model for QDs. The modified model showed great consistency with the experimental data, especially in small size range. According to the variation of confined barrier, the band gap calculation model of PbSe QDs was analyzed in different solvents. The calculating results showed that the modified model was almost solvent-independent, which was consistent with our experimental results and related reports.
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Dielectric Confinement Effect on Calculating the Band Gap of PbSe Quantum Dots

doi: 10.1088/1674-0068/24/02/162-166
Funds:  This work is supported by the National High Tech Re-search and Development Program (No.2007AA03Z112 and No.2007AA06Z112).

Abstract: Considering the dielectric confinement effect on excitonics of PbSe quantum dots (QDs), a correction factor in the wave function was introduced to propose a new band gap calculation model for QDs. The modified model showed great consistency with the experimental data, especially in small size range. According to the variation of confined barrier, the band gap calculation model of PbSe QDs was analyzed in different solvents. The calculating results showed that the modified model was almost solvent-independent, which was consistent with our experimental results and related reports.

Wen-chao Cheng, Tie-qiang Zhang, Yu Zhang. Dielectric Confinement Effect on Calculating the Band Gap of PbSe Quantum Dots[J]. Chinese Journal of Chemical Physics , 2011, 24(2): 162-166. doi: 10.1088/1674-0068/24/02/162-166
Citation: Wen-chao Cheng, Tie-qiang Zhang, Yu Zhang. Dielectric Confinement Effect on Calculating the Band Gap of PbSe Quantum Dots[J]. Chinese Journal of Chemical Physics , 2011, 24(2): 162-166. doi: 10.1088/1674-0068/24/02/162-166

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