Data · dataset · 2023
Temperature-dependent luminescence spectra of Ruddlesden-Popper quasi-2D perovskites
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The quasi-2D Ruddlesden-Popper (R-P) halide perovskite has been widely used in solar cells, light-emitting diodes, lasers and other optoelectronic devices due to its excellent photoelectric properties.
Description
However, the exciton-phonon interaction, which seriously affects the relaxation and transport characteristics of carriers, has not been fully revealed. Compared with the widely studied 3D perovskite structure, quasi 2D perovskite has a naturally formed quantum well structure with greater exciton binding energy and more obvious exciton effect.
However, the exciton-phonon interaction of quasi 2D perovskite is still less studied. Therefore, a quasi-2D R-P perovskite film (PEA)2Csn-1PbnBr3n+1 has been prepared by solution method with a gain coefficient of ~1090.62 cm-1 and an amplified spontaneous emission of low threshold (~12.48 μJ/cm2). Based on this, we studied the luminescence properties of (PEA)2Csn-1PbnBr3n+1 film with temperature variation by using variable temperature fluorescence spectroscopy (77-300K) and transient absorption spectroscopy, in order to elaborate the influence of exciton-phonon interaction on its luminescence properties.
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It was found that in the low temperature domain (<120 K), The bandgap change caused by exciton-phonon interaction is relatively weak, and the lattice thermal expansion is dominant. With the increase of temperature, the exciton-phonon interaction has a great influence on the change of bandgap. On the other hand, the exciton-phonon interaction causes the line width of the luminescence spectrum to widen, but we observed the abnormal line width narrowing in the temperature range of 77 K-120 K, which is attributed to an energy transfer mechanism in the multi-quantum well caused by the localization effect, until after 120 K, the line widening caused by the exciton-phonon interaction is sufficient to reverse this trend.
In this paper, the exciton-phonon interaction of quasi 2D perovskite is of guiding value for improving the optical properties and luminescence applications of quasi 2D perovskite.
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- DOI doi.org/10.57760/sciencedb.07153 ↗
DOI / persistent id · from scidb cn
Catalogue records · 1
- OAI-PMH record scidb.cn/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=10.57760%2… ↗
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- Earth & Environmental Science · Engineering · Humanities · Life Sciences · Social Science
Provenance · 1 source records, 10 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| ScienceDB | 10.57760/sciencedb.07153 | 10 d ago | JSON v1 |
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|---|---|---|---|
| access_level | source · scidb cn | connector:scidb_cn@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · scidb cn | connector:scidb_cn@1.0.0 | |
| concepts[field].local:field:engineering | mapping · scidb cn | connector:scidb_cn@1.0.0 | |
| concepts[field].local:field:humanities | mapping · scidb cn | connector:scidb_cn@1.0.0 | |
| concepts[field].local:field:life-sciences | mapping · scidb cn | connector:scidb_cn@1.0.0 | |
| concepts[field].local:field:social-science | mapping · scidb cn | connector:scidb_cn@1.0.0 | |
| description | source · scidb cn | connector:scidb_cn@1.0.0 | /metadata/dc/description |
| license | source · scidb cn | connector:scidb_cn@1.0.0 | /metadata/dc/rights |
| publication_date | source · scidb cn | connector:scidb_cn@1.0.0 | |
| title | source · scidb cn | connector:scidb_cn@1.0.0 | /metadata/dc/title |