| 초록 |
We report significantly enhanced stability of perovskite nanocrystals (PNCs) by employing amine-methacrylate-functionalized siloxane dimer (AMD) ligand and chemical encapsulation by siloxane hybrid matrix. AMD ligands are formed via in-situ sol-gel reaction during PNC fabrications to obtain methacrylate-functionalization of PNC (M-PNC) that have excellent optical properties, and enhanced stability by robust siloxane bonds in AMD ligands. To further improve stability, M-PNC is chemically encapsulated by siloxane matrix, forming M-PNC/siloxane composite film that exhibits high initial PLQY, and excellent thermal-, chemical-, and photo-stability. These excellent stabilities are induced by chemical crosslinking between functional groups of M-PNC and siloxane matrix. The origin of stability is also investigated using various analysis. To confirm feasibility of M-PNC, red-emitting inorganic phosphor is incorporated in M-PNC/siloxane composite, which shows wide color gamut and high stability. |
