Theoretical Studies on the Effect of Confinement on Quantum Dots Using the Brus Equation

• 作者: Ephrem O. Chukwuocha Michael C. Onyeaju Taylor S. T. Harry
• 来源期刊: 凝固态物理国际期刊(英文)
• 学科: 医学
• 关键词: QUANTUM DOT Confinment NANOPARTICLES Brus EQUATION
• 年，卷（期）: 2012,（2）
• 页码范围: 96-100
• 页数: 5页
• 分类号: R73

摘要

Quantum confinement effect in semiconductor quantum dots (QD's) of CdSe, ZnS and GaAs has been studied using the Brus Equation. It is found that the simple models obtained for the three different semiconductor nanocrystals exhibit the size dependence predicted by the particle-in-a-box model. The result shows that ground state confinement energy is inversely proportional to the size (radius). Thus, as one increases the radius (size), the confinement energy decreases, but never reaches zero. i.e., the lowest possible energy for the quantum dot sample is not zero.