移动载流子的光致发光衰减受颗粒表面不完全猝灭及亚扩散传播的影响
Photoluminescence decay of mobile carriers influenced by imperfect quenching at particle surfaces with subdiffusive spread
AI总结：
本文扩展了光致发光量子产率的理论模型，引入亚扩散机制解释复杂衰减动力学，揭示了表面反应限制下的非指数衰减规律，并全面描述了移动载流子、固定极化子与自陷激子的行为。
摘要：
我们最近提出了一个定量模型来解释光致发光（PL）量子产率的颗粒尺寸依赖性，并揭示了激子猝灭不受扩散控制，而是受表面反应限制。然而，尚未使用我们的理论模型分析激子衰减动力学。在此，我们研究了该模型的动力学方面，并表明应将其扩展以考虑亚扩散而非正常扩散，以保持与观察到的复杂衰减动力学的一致性；我们还表明，即使在亚扩散下PL猝灭受表面反应限制时，PL衰减动力学也是非指数的。我们对PL量子产率和PL衰减动力学的理论分析提供了关于移动电荷载流子、固定极化子和自陷激子的全面图景。
英文摘要：
We recently presented a quantitative model to explain the particle-size dependence of photoluminescence (PL) quantum yields and revealed that exciton quenching is not diffusion controlled, but limited by surface reactions. However, the exciton decay kinetics has not yet been analyzed using our theoretical model. Here, we study kinetic aspects of the model and show that it should be extended to take into account subdiffusion rather than normal diffusion to maintain consistency with the observed complex decay kinetics; we also show that the PL decay kinetics is nonexponential even when the PL quenching is limited by surface reactions under subdiffusion. Our theoretical analysis of the PL quantum yield and the PL decay kinetics provides a comprehensive picture of mobile charge carriers, immobile polarons, and self-trapped excitons.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
