【摘要】 硫化铅量子点具有带隙可调、多激子效应等特性，被广泛应用于光电探测和太阳能电池等领域。然而，硫化铅胶体量子点（PbS QDs）表面被碘化铅基质（PbI2）所包覆，阻碍了载流子传输，并且在PbS晶面带来上更多缺陷位点。基于此，本文采用一种针对量子点基质的原位协同钝化策略，即采用苯乙基碘化铵（PEAI）在合成过程中进行调控。X射线光电子能谱（XPS）及广角X射线衍射（GIWAXS）等结果表明调控后的量子点基质及缺陷位点均得到有效优化。更多还原

【Abstract】 Lead sulfide quantum dots are widely used in photoelectric detection and solar cells due to their adjustable band gap and multi-exciton effect. However, the surface of lead sulfide colloidal quantum dots（PbS QDs） is coated by lead iodide matrix（PbI₂）, which hinders carrier transport and brings more defect sites on the PbS crystal surface. Based on this, we adopt an in-situ synergistic passivation strategy for the quantum dot matrix in this paper, that is, phenylethyl ammonium iodide（PEAI） is used to control the synthesis process.X-ray photoelectron spectroscopy（XPS）, Wide-angle X-ray diffraction（GIWAXS） and other characterization results show that the regulated quantum dot matrix and defect sites are effectively optimized.更多还原