环保型InP/ZnSe核壳结构量子点物性调控及高性能光电化学电池研究

低成本、大规模、可溶液加工的半导体胶体量子点是一类重要的光电功能材料。其独特的光学特性，如高光吸收系数、激子生成效率以及能带可调性等，使其能作为光电化学电池的高效光敏材料并将可再生太阳能转换为氢能源，是解决全球能源危机的重要途径之一。当前胶体量子点光电化学电池领域一个挑战性难题是实现基于环境友好型量子点的高性能、高稳定性系统。本项目计划在已有研究基础上，针对环境友好型InP/ZnSe核壳量子点，研究壳层Cu离子掺杂和InGaP界面层的精准构建，协同优化其光电性能并提升对应量子点光电化学电池器件性能。主要内容包括：（1）量子点壳层掺杂及界面结构可控生长；（2）微观结构相关光学性质及能带调制；（3）瞬态光生载流子动力学及相关理论研究；（4）量子点光电化学电池器件性能优化。该项目的实施将进一步推动环境友好型量子点光电能源领域的发展，具有重要的基础研究价值和潜在的商业价值。

Low-cost, large-scale and solution-processed semiconductor colloidal quantum dots (CQDs) are promising optoelectronic nanomaterials showing unique optical properties such as high absorption coefficients, tunable band gap and multiple exciton generation. The CQDs have demonstrated as efficient photosensitizers in solar-driven photoelectrochemical (PEC) cells that effectively convert renewable solar energy into hydrogen energy, which is one of the promising pathways to solve the global energy crisis. Currently, one significant goal in this field is to realize high performance and long-term stable PEC system based on environmentally friendly CQDs. This project aims to study the synergistic effect of Cu-doping and interfacial InGaP layer engineering for environmental-friendly InP/ZnSe core/shell CQDs, optimizing their optoelectronic properties and improving the performance of corresponding CQDs-based PEC cells. The main research objectives include: (1) Controllable synthesis of Cu-doped/InGaP alloyed eco-friendly core/shell CQDs; (2) Nanostructure-related optical properties and band structure engineering; (3) Transient photoinduced charge carrier dynamics and the theoretical study of electron-hole wavefunctions; (4) Optimized performance of CQDs-based PEC cells. These investigations can promote the developments of environmentally friendly CQDs-based solar energy conversion devices, representing an essential step towards the commercialization of this emerging solar-to-fuel conversion technology.