Ultrafast excited-state dynamics of SnSe2–SnSe composite thin film
Source abstract
Abstract
We report the ultrafast carrier dynamics of an SnSe2–SnSe composite thin film (∼150 nm thick) deposited using thermal evaporation of in-house synthesized SnSe2 powder. Raman and UV–visible spectroscopy supports the optical properties (direct and indirect bandgaps of 1.86 eV and 0.96 eV, respectively). Ultrafast transient spectroscopy is used to study the charge excited state dynamics in the SnSe2–SnSe composite thin film in the femtosecond to nanosecond interval. An energy model has been proposed based on the ultrafast transient absorption and the thin film's steady-state absorption studies. This article provides comprehensive knowledge about the excited carriers and their relaxations in 0.9 ps–31.1 ns via different trap states.
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Research context
OpenAlex topics: Chalcogenide Semiconductor Thin Films · Perovskite Materials and Applications · Quantum Dots Synthesis And Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Academy of Scientific and Innovative Research (AcSIR) 1 , Ghaziabad, Uttar Pradesh 201002, India
Indian Reference Materials (BND) Division, CSIR-National Physical Laboratory 2 , Dr. K. S. Krishnan Marg, New Delhi 110012, India
Quantum Phenomenon and Applications, CSIR-National Physical Laboratory 3 , Dr. K. S. Krishnan Marg, New Delhi 110012, India
Advanced Materials and Device Metrology Division, CSIR-National Physical Laboratory 4 , Dr. K. S. Krishnan Marg, New Delhi 110012, India
References (53)
Show source-provided references
1. Electronics based on two-dimensional materials10.1038/nnano.2014.207 ↗
2. Electronics and optoelectronics of two-dimensional transition metal dichalcogenides10.1038/nnano.2012.193 ↗
3. Two-dimensional material nanophotonics10.1038/nphoton.2014.271 ↗
4. Catalysis with two-dimensional materials and their heterostructures10.1038/nnano.2015.340 ↗
5. Progress, challenges, and opportunities in two-dimensional materials beyond graphene10.1021/nn400280c ↗
6. Review of ultrafast spectroscopy studies of valley carrier dynamics in two-dimensional semiconducting transition metal dichalcogenides10.1088/1674-1056/26/3/037801 ↗
7. Emerging low-dimensional materials for nonlinear optics and ultrafast photonics10.1002/adma.201605886 ↗
8. Ultrafast excitonic behavior in two-dimensional metal-semiconductor heterostructure10.1021/acsphotonics.9b00399 ↗
9. The physics of quantum materials10.1038/nphys4302 ↗
10. Vapour transport deposition of fluorographene oxide films and electro-optical device applications10.1016/j.apmt.2018.08.015 ↗
11. Hydrogen evolution reaction activity of graphene–MoS2 van der Waals heterostructures10.1021/acsenergylett.7b00349 ↗
12. Terahertz sources and detectors and their application to biological sensing10.1098/rsta.2003.1327 ↗
13. Terahertz technology10.1109/22.989974 ↗
14. Cutting-edge terahertz technology10.1038/nphoton.2007.3 ↗
15. Exploration of terahertz from time-resolved ultrafast spectroscopy in single-crystal Bi2Se3 topological insulator10.1007/s10854-020-03335-5 ↗
16. Recent development of two-dimensional transition metal dichalcogenides and their applications10.1016/j.mattod.2016.10.002 ↗
17. Emerging device applications for semiconducting two-dimensional transition metal dichalcogenides10.1021/nn500064s ↗
18. Photonics and optoelectronics of two-dimensional materials beyond graphene10.1088/0957-4484/27/46/462001 ↗
19. Polaritons in layered two-dimensional materials10.1038/nmat4792 ↗
20. Transport properties and high thermopower of SnSe2: A full ab-initio investigation10.1021/acs.jpcc.6b11467 ↗
21. Tin-selenide as a futuristic material: Properties and applications10.1039/d0ra09807h ↗
22. Highly responsive, low-bias operated SnSe2 nanostructured thin film for trap assisted NIR photodetector10.1016/j.jallcom.2020.155384 ↗
23. Band gap engineering of hexagonal SnSe2 nanostructured thin films for infra-red photodetection10.1038/s41598-017-15519-x ↗
24. High selectivity gas sensing and charge transfer of SnSe210.1021/acssensors.9b01461 ↗
25. NO2 gas sensor based on SnSe/SnSe2 p–n hetrojunction10.1166/jnn.2021.19278 ↗
26. Au/Pd bimetallic nanoparticles decorated SnSe2 thin films for NO2 detection10.1166/jnn.2021.19277 ↗
27. Two-dimensional tin selenide nanostructures for flexible all-solid-state supercapacitors10.1021/nn5004315 ↗
28. SnSe2 quantum dot sensitized solar cells prepared employing molecular metal chalcogenide as precursors10.1039/c2cc17081g ↗
29. Hydrothermal synthesis of Cu-doped SnSe2 nanostructure for efficient lithium storage10.1016/j.jelechem.2019.113205 ↗
30. SnSe2 nanorods on carbon cloth as a highly selective, active, and flexible electrocatalyst for electrochemical reduction of CO2 into formate10.1021/acsaem.9b01643 ↗
31. Spontaneous full photocatalytic water splitting on 2D MoSe2/SnSe2 and WSe2/SnSe2 vdW heterostructures10.1039/C9NR03469B ↗
32. Thickness dependent study of RF sputtered ZnO thin films for optoelectronic device applications10.1007/s13391-015-4445-y ↗
33. Thickness-dependent structural and optoelectronic properties of In2O3 films prepared by spray pyrolysis technique10.1007/s11664-016-4618-y ↗
34. Layer-dependent properties of SnS2 and SnSe2 two-dimensional materials10.1103/physrevb.94.125443 ↗
35. Thickness-dependent ultralow in-plane thermal conductivity of chemical vapor-deposited SnSe2 nanofilms: Implications for thermoelectrics10.1021/acsanm.0c02550 ↗
36. Layer-dependent third-harmonic generation in multi-layer SnSe210.1117/12.2544799 ↗
37. Polymer-polymer förster resonance energy transfer significantly boosts the power conversion efficiency of bulk-heterojunction solar cells10.1002/adma.201501275 ↗
38. Lateral heterostructures formed by thermally converting n-type SnSe2 to p-type SnSe10.1021/acsami.8b01235 ↗
39. Size-dependent Raman shift of semiconductor nanomaterials determined using bond number and strength10.1039/c7cp05495e ↗
40. Quantitative analysis using Raman spectrometry10.1366/000370203321165133 ↗
41. Application of Raman spectroscopy for characterizing synthetic non-metallic inclusions consisting of calcium sulphide and oxides10.3390/app10062113 ↗
42. Characterization and optical properties of CdSe nano-crystalline thin films
43. The role of traps in the photocurrent generation mechanism in thin InSe photodetectors10.1039/c9mh01020c ↗
44. Substrate effects in high gain, low operating voltage SnSe2 photoconductor10.1088/1361-6528/aa9b18 ↗
45. Real-time observing ultrafast carrier and phonon dynamics in colloidal tin chalcogenide van der Waals nanosheets10.1021/acs.jpclett.9b01470 ↗
46. Sign of differential reflection and transmission in pump-probe spectroscopy of graphene on dielectric substrate10.1364/prj.3.0000a1 ↗
47. Defect states of chemical vapor deposition grown GaN nanowires: Effects and mechanisms in the relaxation of carriers10.1063/1.3212989 ↗
48. Probing ultrafast carrier and phonon dynamics in semiconductors10.1063/1.367411 ↗
49. Carrier relaxation dynamics in defect states of epitaxial GaN/AlN/Si using ultrafast transient absorption spectroscopy10.1039/c5ra10877b ↗
50. See web.vu.lt/ff/mvengris/images/TR_spectroscopy02 for Introduction to Time-Resolved Spectroscopy.
51. 2001
52. Comprehensive data analysis of femtosecond transient absorption spectra: A review10.1016/j.jphotochemrev.2011.10.002 ↗
53. Carrier trapping and recombination: The role of defect physics in enhancing the open circuit voltage of metal halide perovskite solar cells10.1039/c6ee01729k ↗