Generation and Relaxation Dynamics of Multiple Excitons in Semiconductor Quantum Dots Adsorbed on Electrodes

在这项研究中，半导体量子点被用作光收集器在敏化纳米晶TiO2太阳能电池。通过(1)修饰和控制半导体量子点敏化太阳能电池中的纳米界面，(2)寻找半导体量子点高效敏化的最佳实验条件，有望提高能量转换效率。我们发现，通过表面改性、有序纳米结构TiO2电极和量子点共敏可以大大提高光伏性能。我们成功地测量了PbS量子点中的多激子产生（MEG）和弛豫动力学。

In this study, semiconductor QDs were used as light harvesters in sensitized nanocrystalline TiO2 solar cells. The energy conversion efficiency is expected to be improved by(1) modifying and controlling the nano-interfaces in the semiconductor QDs sensitized solar cells and(2) finding the optimized experimental conditions for high efficient in semiconductor QDs. We have found that photovoltaic performances can be improved greatly by applying surface modification, ordered nanostructured TiO2 electrodes, and co-sensitization of QDs. We have succeeded in measuring the multiple exciton generation(MEG) and relaxation dynamics in PbS QDs.