Manipulating efficient light emission in two-dimensional perovskite crystals by pressure-induced anisotropic deformation
- Tianjin Univ. of Technology (China); Nanyang Technological Univ. (Singapore). Division of Physics and Applied Physics, School of Physical and Mathematical Sciences
- Tianjin Univ. of Technology (China)
- Inst. of High Performance Computing (Singapore)
- Nanyang Technological Univ. (Singapore). Division of Physics and Applied Physics, School of Physical and Mathematical Sciences
- Nanyang Technological Univ. (Singapore). School of Materials Science and Engineering
- Northwestern Polytechnical Univ. (NPU) (China). Shaanxi Inst. of Flexible Electronics (SIFE)
- Nanyang Technological Univ. (Singapore). Division of Physics and Applied Physics, School of Physical and Mathematical Sciences MajuLab, International Joint Research Unit (Singapore); Nanyang Technological Univ. (Singapore). Nanoelectronics Center of Excellence, School of Electrical and Electronic Engineering
The hybrid nature and soft lattice of organolead halide perovskites render their structural changes and optical properties susceptible to external driving forces such as temperature and pressure, remarkably different from conventional semiconductors. Here, we investigate the pressure-induced optical response of a typical two-dimensional perovskite crystal, phenylethylamine lead iodide. At a moderate pressure within 3.5 GPa, its photoluminescence red-shifts continuously, exhibiting an ultrabroad energy tunability range up to 320 meV in the visible spectrum, with quantum yield remaining nearly constant. First-principles calculations suggest that an out-of-plane quasi-uniaxial compression occurs under a hydrostatic pressure, while the energy is absorbed by the reversible and elastic tilting of the benzene rings within the long-chain ligands. This anisotropic structural deformation effectively modulates the quantum confinement effect by 250 meV via barrier height lowering. The broad tunability within a relatively low pressure range will expand optoelectronic applications to a new paradigm with pressure as a tuning knob.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 1545866
- Journal Information:
- Science Advances, Vol. 5, Issue 7; ISSN 2375-2548
- Publisher:
- AAASCopyright Statement
- Country of Publication:
- United States
- Language:
- ENGLISH
Web of Science
Photoinduced Trap Passivation for Enhanced Photoluminescence in 2D Organic–Inorganic Hybrid Perovskites
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journal | February 2020 |
Pressure responses of halide perovskites with various compositions, dimensionalities, and morphologies
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journal | January 2020 |
Enhanced emission from CH 3 NH 3 PbBr 3 perovskite films by graphene quantum dot modification
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journal | January 2020 |
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