PREPARATION AND CHARACTERIZATION OF POLYVINYL ALCOHOL THIN FILMS FOR ORGANIC THIN FILM TRANSISTORS AND BIOMEDICAL APPLICATIONS

2018 ◽  
Vol 5 (2) ◽  
pp. 16-18
Author(s):  
Chandar Shekar B ◽  
Ranjit Kumar R ◽  
Dinesh K.P.B ◽  
Sulana Sundar C ◽  
Sunnitha S ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Thin Film Transistors ◽  
Gravimetric Method ◽  
Dip Coating ◽  
Organic Thin Film Transistors ◽  
Poly Vinyl Alcohol ◽  
Organic Thin Film ◽  
Glass Substrates ◽  
Coating Method

Thin films of poly vinyl alcohol (PVA) were prepared on pre-cleaned glass substrates by Dip Coating Method. FTIR spectrum was used to identify the functional groups present in the prepared films. The vibrational peaks observed at 1260 cm-1 and 851 cm-1 are assigned to C–C stretching and CH rocking of PVA.The characteristic band appearing at 1432 cm-1 is assigned to C–H bend of CH2 of PVA. The thickness of the prepared thin films were measured by using an electronic thickness measuring instrument (Tesatronic-TTD20) and cross checked by gravimetric method. XRD spectra indicated the amorphous nature of the films.Surface morphology of the coated films was studied by scanning electron microscope (SEM). The surface revealed no pits and pin holes on the surface. The observed surface morphology indicated that these films could be used as dielectric layer in organic thin film transistors and as drug delivery system for wound healing.

scholarly journals Solid-state organization of n-type carbazole-based semiconductors for organic thin-film transistors

2018 ◽  
Vol 20 (2) ◽  
pp. 1142-1149 ◽  
Author(s):  
Marta Reig ◽  
Joaquim Puigdollers ◽  
Dolores Velasco
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Thin Film Transistors ◽  
Alkyl Chain ◽  
Organic Thin Film Transistors ◽  
Organic Thin Film ◽  
Active Layers ◽  
Xrd Studies ◽  
State Organization ◽  
Chain Lengths

n-Type OTFTs were fabricated and characterised from a series of tricyanovinyl-substituted carbazole-based materials with different N-alkyl chain lengths as active layers. XRD studies gave insights into the main intermolecular interactions, molecular packing motifs and the degree of molecular order in thin films that justified the performance of the devices.

Polysiloxane–poly(vinyl alcohol) composite dielectrics for high-efficiency low voltage organic thin film transistors

2019 ◽  
Vol 7 (16) ◽  
pp. 4879-4886 ◽  
Author(s):  
Jupeng Cao ◽  
Xiaoyun Wei ◽  
Yuxuan Che ◽  
Aiyuan Li ◽  
Yaowu He ◽  
...  
Keyword(s):  
Thin Film ◽  
Vinyl Alcohol ◽  
Thin Film Transistors ◽  
Solution Method ◽  
High Efficiency ◽  
Low Voltage ◽  
Organic Thin Film Transistors ◽  
Poly Vinyl Alcohol ◽  
Organic Thin Film ◽  
Composite Polymer

The strategy of composite polymer dielectrics for low consumption-high efficiency organic thin film transistors via the solution method.

Nano Composite PVA-TiO2 Thin Films for OTFTs

2013 ◽  
Vol 678 ◽  
pp. 335-342 ◽  
Author(s):  
S. Sathish ◽  
Bellan Chandar Shekar ◽  
B.T. Bhavyasree
Keyword(s):  
Thin Films ◽  
Surface Morphology ◽  
Composite Films ◽  
Gravimetric Method ◽  
Dip Coating ◽  
Polymer Matrices ◽  
Poly Vinyl Alcohol ◽  
Organic Thin Film ◽  
Composite Polymer ◽  
Amorphous Nature

Pure PVA and composite thin films of poly vinyl alcohol (PVA)/Titanium dioxide (TiO2) were prepared on pre-cleaned glass substrates by Dip Coating Technique (DCT) and Metal Organic Deposition Technique (MODT). EDS and FTIR spectrum were used to identify the composition of the prepared films. The vibrational peaks observed at 1260 cm-1 and 851 cm-1 are assigned to C–C stretching and CH rocking of PVA. The characteristic band appearing at 1432 cm-1 is assigned to C–H bend of CH2 of PVA. The bands observed around 847 cm-1 and 601cm-1 belong to the asymmetric stretching of Ti–O–Ti groups. The last band at 460 cm-1 is due to the bending mode of Ti–O–Ti. The bands covered by Ti-O were located at 540, 700 and 950 cm-1. From the FTIR spectra, it is observed that some of the peaks of composite films were shifted and some of them were disappeared with respect to the pure compounds. This results manifested the conclusion about the specific interactions in composite polymer matrices and hence the complexation. Thus, complex formation in the composite polymer matrices has been confirmed from this analysis. The thickness of the coated films were measured by using an electronic thickness measuring instrument (Tesatronic-TTD-20), gravimetric method and cross checked by optical spectrophotometer. XRD spectra indicated the amorphous nature of the films. Surface morphology of the coated films was studied by scanning electron microscope (SEM). The surface revealed no pits and pin holes on the surface. Both as grown and annealed films showed predominantly amorphous nature. The observed surface morphology and thermal stability indicated that these films could be used as dielectric layer in organic thin film transistors.

Organic thin-film transistors fabricated using a slot-die-coating process and related sensing applications

RSC Advances ◽  
2016 ◽  
Vol 6 (103) ◽  
pp. 101613-101621 ◽  
Author(s):  
Byoungchoo Park ◽  
In-Gon Bae ◽  
O. Eun Kwon ◽  
Hong Goo Jeon
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Thin Film Transistors ◽  
Polymer Binder ◽  
Organic Thin Film Transistors ◽  
Coating Process ◽  
Organic Thin Film ◽  
Sensing Applications ◽  
Semiconductor Thin Films ◽  
Slot Die

We herein present the results of a study involving the fabrication of semiconductor thin films for organic thin-film transistors composed of a small molecular TIPS-PEN composite blended with a polymer binder of PaMS, i.e., TIPS-PEN:PaMS.

Spiral growth mode in DMDPC organic thin film transistors by physical vapor deposition

RSC Advances ◽  
2016 ◽  
Vol 6 (56) ◽  
pp. 50770-50775 ◽  
Author(s):  
Tianjun Liu ◽  
Jiawei Wang ◽  
Liang Wang ◽  
Jing Wang ◽  
Jingbo Lan ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Vapor Deposition ◽  
Thin Film Transistors ◽  
Physical Vapor Deposition ◽  
Organic Thin Films ◽  
Organic Thin Film Transistors ◽  
Spiral Growth ◽  
Organic Thin Film ◽  
Screw Dislocations

We report the observation of a screw-dislocation-driven spiral growth of DMDPC organic thin films. The existence of screw dislocations was clearly confirmed by the observations of outcropped stepsand spiral fringes.

scholarly journals Ultra-high mobility transparent organic thin film transistors grown by an off-centre spin-coating method

2014 ◽  
Vol 5 (1) ◽  
Author(s):  
Yongbo Yuan ◽  
Gaurav Giri ◽  
Alexander L. Ayzner ◽  
Arjan P. Zoombelt ◽  
Stefan C. B. Mannsfeld ◽  
...  
Keyword(s):  
Thin Film ◽  
Spin Coating ◽  
Thin Film Transistors ◽  
High Mobility ◽  
Organic Thin Film Transistors ◽  
Organic Thin Film ◽  
Spin Coating Method ◽  
Coating Method
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