Laser-assisted dry, wet texturing and phase transformation of flexible polyethylene terephthalate substrate revealed by Raman and ultraviolet-visible spectroscopic studies
Source abstract
Abstract
A systematic understanding of laser-induced texturing and its influence on the local structural change in polyethylene terephthalate (PET) substrate offers enhanced performance characteristics of photovoltaic devices. The formation of multiple phases in flexible PET substrate using selective processing by means of laser-assisted heat input reveals enhanced ultraviolet-visible (UV-Vis) absorption. The authors investigate the characteristics of multiple phases formed during the interaction of the laser pulse on the PET substrate processed under dry and wet environments. It is observed that the laser beam profile is replicated on the substrate during wet environment. Moreover, the heat gradient of laser beam have induced various indexed crystalline phases as revealed by Raman spectroscopy as well as their optical characteristics of replicated profile on PET substrate is quantified using UV-Vis absorption spectroscopy. Furthermore, a redshift in the absorption measured at the center of the projected beam profile is attributed to the higher degree of ordered crystalline phase as compared to other graded phases inside the trench. These findings of phase gradients and their influence on optical properties of laser-induced texturing would be useful for laser-based rapid texturing for flexible photovoltaics.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Laser Material Processing Techniques · Surface Roughness and Optical Measurements · Ocular and Laser Science Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Discipline of Metallurgical Engineering and Material Science, Indian Institute of Technology Indore 1 , Indore 453552, India
Discipline of Mechanical Engineering, Indian Institute of Technology Indore 2 , Indore 453552, India
Discipline of Electrical Engineering, India Institute of Technology Indore 3 , Indore 453552, India
References (46)
Show source-provided references
1. Inverted nanocone-based thin film photovoltaics with omnidirectionally enhanced performance10.1021/nn5023878 ↗
2. Highly stretchable and sensitive unidirectional strain sensor via laser carbonization10.1021/am509087u ↗
3. Direct laser writing of porous-carbon/silver nanocomposite for flexible electronics10.1021/acsami.6b02952 ↗
4. High-performance flexible energy storage and harvesting system for wearable electronics10.1038/srep26122 ↗
5. Highly efficient Cu (In, Ga) Se2 solar cells grown on flexible polymer films10.1038/nmat3122 ↗
6. Laser assisted wet texturing of flexible polyethylene terephthalate substrate using Nd3+:YAG laser for photovoltaics devices10.1016/j.mseb.2017.08.028 ↗
7. Investigations on effect of laser-induced self-assembled patterning on optical properties of flexible polyimide substrates for solar cell applications10.1088/1361-6463/aa9df7 ↗
8. Extending ultra-short pulse laser texturing over large area10.1016/j.apsusc.2016.05.172 ↗
9. State of the art in laser surface texturing10.1115/1.1828070 ↗
10. Direct writing of polymer lasers using interference ablation10.1002/adma.201100250 ↗
11. Ultrafast laser ablation of transparent conductive silver nanowire thin film on polyethylene terephthalate substrate10.2351/1.4944511 ↗
12. High resolution selective multilayer laser processing by nanosecond laser ablation of metal nanoparticle films10.1063/1.2802302 ↗
13. Selective patterning of ITO on flexible PET substrate by 1064 nm picosecond laser10.1016/j.phpro.2011.03.114 ↗
14. Topography, crystallinity and wettability of photoablated PET surfaces10.1021/la9809877 ↗
15. Laser patterning of very thin indium tin oxide thin films on PET substrates10.1016/j.apsusc.2015.10.019 ↗
16. Transparent, flexible surface enhanced Raman scattering substrates based on Ag-coated structured PET (polyethylene terephthalate) for in-situ detection10.1016/j.apsusc.2016.04.022 ↗
17. Substrates for flexible electronics: A practical investigation on the electrical, film flexibility, optical, temperature, and solvent resistance properties10.1002/polb.22227 ↗
18. Alternative back contact materials for thin film Cu (In, Ga) Se2 solar cells10.1016/S0040-6090(03)00257-8 ↗
19. Alternative back contact designs for Cu (In, Ga) Se2 solar cells on polyimide foils10.1016/j.tsf.2012.11.091 ↗
20. Impact of Na on MoSe2 formation at the CIGSe/Mo interface in thin-film solar cells on polyimide foil at low process temperatures10.1016/j.actamat.2013.09.051 ↗
21. Propagation of a Gaussian wave packet in an absorbing medium10.1103/PhysRevA.34.4851 ↗
22. On the propagation of Gaussian beams of light through lenslike media including those with a loss or gain variation10.1364/AO.4.001562 ↗
23. Influence of laser wavelength and beam profile on Nd3+:YAG laser assisted formation of polycrystalline-Si films10.1016/j.tsf.2009.12.003 ↗
24. Excimer laser etching of polyimide10.1063/1.336012 ↗
25. Effects of different laser and plasma treatments on the interface and adherence between evaporated aluminium and polyethylene terephthalate films: X-ray photoemission, and adhesion studies10.1016/j.apsusc.2004.09.122 ↗
26. Sample preparation and AFM analysis of heterophase polypropylene systems10.1016/S0032-3861(03)00392-6 ↗
27. Grazing-incidence small-angle X-ray scattering from thin polymer films with lamellar structures—The scattering cross section in the distorted-wave Born approximation10.1107/S0021889806012337 ↗
28. A new mechanism in the formation of PET extended-chain crystal10.1016/S0032-3861(00)00387-6 ↗
29. Quantification of polyimide carbonization after laser ablation10.1063/1.1289516 ↗
30. Modeling of nanosecond laser ablation with vapor plasma formation10.1063/1.2190718 ↗
31. Photoablation characteristics of novel polyimides synthesized for high-aspect-ratio excimer laser LIGA process10.1088/0960-1317/14/4/007 ↗
32. Experimental studies and thermal modelling of 1064-and 532-nm Nd:YVO4 micro-laser ablation of polyimide10.1007/s00339-004-3085-0 ↗
33. Molecular orientation in poly (ethylene terephthalate) by means of laser–raman spectroscopy
34. Low-frequency Raman scattering and structure of amorphous polymers: Stretching effect10.1063/1.460896 ↗
35. Structure of terephthalate polymers I—infra-red spectra and molecular structure of poly (ethylene terephthalate)10.1016/0032-3861(69)90047-0 ↗
36. Ablation plume particle dynamics during excimer laser ablation of polyimide10.1063/1.358745 ↗
37. Time-resolved microscopy analysis of laser photothermal imaging media10.2352/J.ImagingSci.Technol.(2006)50:5(401) ↗
38. Fluorescence microscopy reveals molecular localisation at line defects in nematic liquid crystals10.1038/srep36477 ↗
39. Micro-Raman study of PET single fibres under high hydrostatic pressure: Phase/conformation transition and amorphization10.1002/jrs.1716 ↗
40. Raman spectra, thermal and mechanical properties of poly(ethylene terephthalate) carbon-based nanocomposite films10.1007/s10965-015-0680-z ↗
41. Experimental determination of the fiber orientation parameters and the Raman tensor of the 1614 cm−1 band of poly (ethylene terephthalate)10.1016/S0022-2860(99)00430-5 ↗
42. Advanced vibrational microspectroscopic study of conformational changes within a craze in poly (ethylene terephthalate)10.1021/ma502193t ↗
43. Fourier transform infrared and Fourier transform Raman spectroscopy of polymers: Principles and applications
44. Chemical and spectroscopic aspects of polymer ablation: Special features and novel directions10.1021/cr010460q ↗
45. Micro-Raman study of the fatigue and fracture behaviour of single PA66 fibres: Comparison with single PET and PP fibres10.1016/j.engfracmech.2006.04.033 ↗
46. Interpretation of the vibrational spectra of poly (ethylene terephthalate)