基于Pb-MOF的鈣鈦礦量子點 CsPbI₃ 的穩(wěn)定性改善

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關鍵詞：Pb-MOF； CsPbI3 量子點；孔洞限制效應中圖分類號： 文獻標志碼：A

Stability improvement of CsPbI3 perovskite quantum dots based on Pb-MOF

GAO Xiaohua， XU Gongjie （School of Optical-Electrical and Computer Engineering， University of Shanghai for Science and Technology， Shanghai 200093， China）

Abstract： All-inorganic perovskite quantum dots CsPb3 have excellent optical properties and are suitable for red light emitting diodes and solar cels. However， the large difference of their atomic radius，as well as the migration of halogen ion caused by the intrinsic soft-lattice nature， would lead to the phase transition and degradation of CsPb3 quantum dots. In this paper， CsPb3 quantum dots （CsPbI3@Pb-MOF-OLAMI） were synthesized using Pb metal organic framework（ Pb -MOF）as lead sources in perovskite. The results showed that the thermal stability improves by 40% ， and the lightstability improves by 15 times after addingthe lead iodide （PbI2） solution：This stability improvement is mainly due to the void-confinement effect. The porous structure of Pb -MOF hinders the migration of halogen ions， which avoids or reduces the formation of defects， and thus alleviates the degeneration of perovskite. This study provides a new strategy for improving the stability of CsPb3 perovskite quantum dots.

Keywords： Pb -MOF; CsPb3 quantum dots; void-confinement effect

引言

近年來，鈣鈦礦材料因其優(yōu)異的光電性能以及在LED、光電探測器、太陽能電池、激光器等領域良好的應用前景引起了廣泛關注[]。（剩余14428字）