The optical properties of inorganic cesium lead bromide perovskite quantum dots (CsPbBr₃-PQDs) make them particularly suitable for use as semiconductors. However, surface defects limit the performance of PQDs-based materials and devices. Consequently, this study investigated a surface passivation approach using a special polymer coating under standard conditions. In encapsulation materials, one of the most critical requirements is that the polymer should possess transparency; optical applications require material transparency to avoid affecting optical properties. Additionally, for optical compatibility, a polymer's refractive indices must be significantly different from those of emission materials, and the polymer should be amorphous. Therefore, this study investigated the basic optical properties and parameters of a polymethyl methacrylate polymer-passivated CsPbBr₃-PQDs surface and compared them with a bare CsPbBr₃-PQDs surface. Optical properties such as absorbance, transmittance, and reflectance are associated with important optical constants, including bandgap, absorption coefficient, extinction coefficient, refractive index, and dielectric constant. With the surface passivation approach, the surface-modification-dependent optical properties of CsPbBr₃-PQDs can suppress surface states and improve the surface quality of PQDs-based materials and devices without optical contribution or structural changes. Surface passivation results in enhanced emission, which is key to improving the performance of PQDs-based optoelectronic devices.

无机溴化铯铯钙钛矿量子点（CsPbBr ₃-PQDs）使它们特别适合用作半导体。但是，表面缺陷限制了基于PQD的材料和设备的性能。因此，这项研究研究了在标准条件下使用特殊聚合物涂层的表面钝化方法。在封装材料中，最关键的要求之一是聚合物应具有透明度。光学应用要求材料透明，以避免影响光学性能。另外，为了光学兼容性，聚合物的折射率必须与发射材料的折射率显着不同，并且聚合物应为无定形的。因此，本研究研究了聚甲基丙烯酸甲酯聚合物钝化的CsPbBr ₃的基本光学性质和参数。-PQDs表面并将其与裸露的CsPbBr ₃ -PQDs表面进行比较。诸如吸收率，透射率和反射率的光学特性与重要的光学常数相关，包括带隙，吸收系数，消光系数，折射率和介电常数。通过表面钝化方法，CsPbBr ₃ -PQDs的依赖于表面改性的光学特性可以抑制基于表面的状态，并改善基于PQDs的材料和器件的表面质量，而不会产生光学影响或结构变化。表面钝化导致发射增强，这对于提高基于PQD的光电器件的性能至关重要。