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Efficient Red-Emissive Circularly Polarized Electroluminescence Enabled by Quasi-2D Perovskite with Chiral Spacer Cation
- Source :
- ACS Nano; April 2023, Vol. 17 Issue: 8 p7830-7836, 7p
- Publication Year :
- 2023
-
Abstract
- Perovskites are promising environmentally sustainable materials for circularly polarized electroluminescence (CPEL). While another chiral nonemissive layer is required for the developed perovskite-based CPEL, we report herein a highly efficient circularly polarized electroluminescence based on a single layer of quasi-2D perovskite with achiral phenethylammonium iodide (PEAI) and chiral S/R-1-(1-naphthyl)ethylammonium iodide (S/R-NEAI) as dual spacer cations. The quasi-2D perovskite was further passivated by carbazole-functionalized phosphonium. The as-fabricated film exhibits not only a circular dichroism (CD) signal but also prominent circularly polarized luminescence (CPL) activity with a maximum photoluminescence dissymmetry factor (glum) of ∼2.1 × 10–3. More importantly, a highly efficient, spin-polarized light-emitting diode (LED) was fabricated based on the in situpassivated quasi-2D perovskite with a peak external quantum efficiency of 3.7% and a maximum electroluminescence dissymmetry factor (gEL) of ∼4.0 × 10–3.
Details
- Language :
- English
- ISSN :
- 19360851 and 1936086X
- Volume :
- 17
- Issue :
- 8
- Database :
- Supplemental Index
- Journal :
- ACS Nano
- Publication Type :
- Periodical
- Accession number :
- ejs62773957
- Full Text :
- https://doi.org/10.1021/acsnano.3c01054