中文摘要：

采用稳态速率方程模型，对双模自组织量子点光致发光的温度依赖性进行了研究，模拟获得了不同温度下双模自组织量子点的光致发光光谱，并进一步研究了两组量子点分布的光致发光强度比的温度依赖性。研究表明：在低温下（〈75K），两组量子点分布的发光强度比基本保持不变；随着温度的升高（75K〈T〈150K），两组量子点分布的发光强度比将持续增大，且当温度为150K时达到峰值；当温度高于转折温度（150K）后，两组量子点分布的发光强度比显著减小。

英文摘要：

The study on the temperature dependence of photoluminescence （PL） is essentially important for clarifying the processes of energy relaxation and energy transfer in the self-assembled quantum dots （QDs）.The unusual dependence on temperature of both the peak energy position and the width of the PL hands has been reported, The tast redshift of PL energy and the anomalous decrease of line-width with increasing temperature have been attributed to thermally enhanced carrier relaxation between quantum dots due to cartier therreal emission and carrier transport through the wetting laver. The PL intensity quenches with temperature due to carrier thermal escape from the dot ground states to the states of the matrix material and/or nonradiative recombination centers. In this paper, the temperature dependenc, e of the PL of self-assembled bimodal QDs was simulated by using a steady-state rate equation model. The temperature dependence of PL intensity ratio of two QDs populations was emphatically investigated. The results showed that, the intensity ratio remains constant at low temperature （ 〈75 K） and increases continuously at intermediate temperature（75 K 〈 T〈 150 K） ; when the temperature is raised above 150 K, the intensity ratio has an abnormal decrease.