التفاصيل البيبلوغرافية
| العنوان: |
Structural Analysis and Carrier Relaxation Dynamics of 2D CsPbBr 3 Nanoplatelets |
| المؤلفون: |
Kritiman Marjit (10271819), Goutam Ghosh (1638754), Srijon Ghosh (3386714), Sumanta Sain (4916122), Arnab Ghosh (1602067), Amitava Patra (1432552) |
| سنة النشر: |
2021 |
| المجموعة: |
Smithsonian Institution: Digital Repository |
| مصطلحات موضوعية: |
Biophysics, Biochemistry, Cell Biology, Genetics, Pharmacology, Biotechnology, Space Science, Biological Sciences not elsewhere classified, Chemical Sciences not elsewhere classified, Physical Sciences not elsewhere classified, photoinduced carrier dynamics, basal planes, Carrier Relaxation Dynamics, cooling dynamics, charge transfer, dielectric screening, ultrafast carrier relaxation dynamics, band-edge state, 210 fs, absorption spectroscopy, 2 D perovskite-based photovoltaic d., excitonic absorption band, Rietveld analysis, monolayer thickness, 2 D CsPbBr 3 NPLs, ML, decay time, cell applications, PL band, CsPbBr 3 NPLs |
| الوصف: |
Two-dimensional (2D) cesium lead halide perovskite nanoplatelets (NPLs) have received tremendous attention due to their unique properties for designing solar cell applications. Here, we investigated the crystal structure of 2D CsPbBr 3 nanoplatelets (NPLs) and their ultrafast carrier relaxation dynamics with varying the monolayer (ML) thickness using femtosecond transient absorption spectroscopy (fs-TAS). Rietveld analysis suggested that the basal planes of the NPLs are composed of (101) and (101) planes while the remaining four facets (thickness) are composed of (101), (101), (010), and (010) planes of the orthorhombic phase. The formation of the orthorhombic CsPbBr 3 NPLs by stacking the structural motifs of PbBr 6 octahedra in the crystallographic directions is evident from the atomic modeling. The change of monolayer thickness leads to a red-shift of the excitonic absorption band and PL band and enhancement of decay time. The cooling dynamics of the hot carrier to the band-edge state by phonon emission varies from 140 to 210 fs with thickness by modification of quantum confinement and dielectric screening. We observed both energy and charge transfer between 2D CsPbBr 3 NPLs with an organic chromophore, N , N ′-bis(hexadecyl)perylene-3,4,9,10-tetracarboxylic acid diimide (PDI), which is thickness-dependent. A deep understanding of the photoinduced carrier dynamics of the 2D CsPbBr 3 NPLs will pave the way to designing 2D perovskite-based photovoltaic devices. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
unknown |
| Relation: |
https://figshare.com/articles/journal_contribution/Structural_Analysis_and_Carrier_Relaxation_Dynamics_of_2D_CsPbBr_sub_3_sub_Nanoplatelets/14710466 |
| DOI: |
10.1021/acs.jpcc.1c03236.s001 |
| الاتاحة: |
https://doi.org/10.1021/acs.jpcc.1c03236.s001 |
| Rights: |
CC BY-NC 4.0 |
| رقم الانضمام: |
edsbas.C00A1532 |
| قاعدة البيانات: |
BASE |