Quantum Yield and Stability Improvement of Two‐Dimensional Perovskite Via a Second Fluorinated Insulator Layer

Autor: Pengfei Ma, Yuan Zhuang, Hui Lin, Guanjun You, Gongjie Xu, Bin Cai
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Advanced Materials Interfaces, Vol 10, Iss 9, Pp n/a-n/a (2023)
Druh dokumentu: article
ISSN: 2196-7350
20220200
DOI: 10.1002/admi.202202003
Popis: Abstract Aiming at the low luminous‐efficiency of two‐dimensional (2D) perovskite, its quantum yield (QY) and stability are effectively improved by a fluorinated second insulator layer 3,4‐difluoroaniline (F2PA) outside of the first insulator 2‐(2,4‐difluorophenyl) ethylamine (FPEA). The QY of perovskite with two insulator layers is improved by 3.4‐time in contrast with its counterpart with one insulator, which originates from the defect suppression and reduction of exciton Bohr radius by the second layer. The optical stability has extended 1.5‐time by the introduced second layer, as an isolation role for inner decomposed products to volatilize and for outer water molecules to penetrate. The perovskite with two insulator layers retained 90% of its initial optical properties in relative humidity 90%–95% atmosphere for 600 h, meanwhile only 50% for its counterpart with one layer. Two‐more fluorine with stronger hydrophobicity can account for this feature. Adding a second insulator layer is an effective strategy to engineer 2D perovskites and push forward its applications in optoelectronic devices.
Databáze: Directory of Open Access Journals
Externí odkaz: