Limits...
Structural and Photoconductivity Properties of Tellurium/PMMA Films.

Carotenuto G, Palomba M, De Nicola S, Ambrosone G, Coscia U - Nanoscale Res Lett (2015)

Bottom Line: A novel material was obtained by binding the nanosized tellurium grains with poly(methyl methacrylate) (PMMA) polymer.The prepared material was composed of hexagonal tellurium and α-phase of tellurium oxide.Data analysis shows that the photoconductivity of the film with sandwich contact configuration is a linear function of the light power density and increases more than 2 orders of magnitude as compared to the photoresponse of the film with coplanar contact configuration.

View Article: PubMed Central - PubMed

Affiliation: Institute for Polymers, Composites and Biomaterials, National Research Council, Piazzale E. Fermi 1, 80055, Portici, Naples, Italy.

ABSTRACT
Owing to the very brittle nature of tellurium powder, nanoscopic grains with an average size of 4.8 ± 0.8 nm were produced by dry vibration milling technique using a mixer/mill apparatus. A novel material was obtained by binding the nanosized tellurium grains with poly(methyl methacrylate) (PMMA) polymer. The morphology, elemental composition, and structural and optical properties of Te/PMMA films were investigated. The prepared material was composed of hexagonal tellurium and α-phase of tellurium oxide. The electrical properties of the films were studied, for different electrode contact configurations, in dark condition and under white light illumination varying the optical power density from 2 to 170 mW/cm(2) and turning the light on and off cyclically. Data analysis shows that the photoconductivity of the film with sandwich contact configuration is a linear function of the light power density and increases more than 2 orders of magnitude as compared to the photoresponse of the film with coplanar contact configuration.

No MeSH data available.


Time-dependent photocurrent Iph measurements for different light-dark cycles with light power density F ranging from 15 to 170 mW/cm2 for sandwich configuration. In the inset, the maximum photocurrent obtained for each cycle, Iphmax, is plotted as a function of light power density F
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4526513&req=5

Fig10: Time-dependent photocurrent Iph measurements for different light-dark cycles with light power density F ranging from 15 to 170 mW/cm2 for sandwich configuration. In the inset, the maximum photocurrent obtained for each cycle, Iphmax, is plotted as a function of light power density F

Mentions: The photoresponse of the Te/PMMA sample in the sandwich configuration for different light-dark cycles is shown in Fig. 10. The measurements were carried out by applying a bias voltage of 12 μV to the sample varying the light power density from 2 to 170 mW/cm2. The duration of the illumination exposure was fixed at 60 s for each cycle. In this case, the rise time of the signal was about 4 s. When the light is removed, the current quickly decreases with a decay time of about 2 s. The inset in Fig. 10 shows that Iphmax depends linearly on F.Fig. 10


Structural and Photoconductivity Properties of Tellurium/PMMA Films.

Carotenuto G, Palomba M, De Nicola S, Ambrosone G, Coscia U - Nanoscale Res Lett (2015)

Time-dependent photocurrent Iph measurements for different light-dark cycles with light power density F ranging from 15 to 170 mW/cm2 for sandwich configuration. In the inset, the maximum photocurrent obtained for each cycle, Iphmax, is plotted as a function of light power density F
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4526513&req=5

Fig10: Time-dependent photocurrent Iph measurements for different light-dark cycles with light power density F ranging from 15 to 170 mW/cm2 for sandwich configuration. In the inset, the maximum photocurrent obtained for each cycle, Iphmax, is plotted as a function of light power density F
Mentions: The photoresponse of the Te/PMMA sample in the sandwich configuration for different light-dark cycles is shown in Fig. 10. The measurements were carried out by applying a bias voltage of 12 μV to the sample varying the light power density from 2 to 170 mW/cm2. The duration of the illumination exposure was fixed at 60 s for each cycle. In this case, the rise time of the signal was about 4 s. When the light is removed, the current quickly decreases with a decay time of about 2 s. The inset in Fig. 10 shows that Iphmax depends linearly on F.Fig. 10

Bottom Line: A novel material was obtained by binding the nanosized tellurium grains with poly(methyl methacrylate) (PMMA) polymer.The prepared material was composed of hexagonal tellurium and α-phase of tellurium oxide.Data analysis shows that the photoconductivity of the film with sandwich contact configuration is a linear function of the light power density and increases more than 2 orders of magnitude as compared to the photoresponse of the film with coplanar contact configuration.

View Article: PubMed Central - PubMed

Affiliation: Institute for Polymers, Composites and Biomaterials, National Research Council, Piazzale E. Fermi 1, 80055, Portici, Naples, Italy.

ABSTRACT
Owing to the very brittle nature of tellurium powder, nanoscopic grains with an average size of 4.8 ± 0.8 nm were produced by dry vibration milling technique using a mixer/mill apparatus. A novel material was obtained by binding the nanosized tellurium grains with poly(methyl methacrylate) (PMMA) polymer. The morphology, elemental composition, and structural and optical properties of Te/PMMA films were investigated. The prepared material was composed of hexagonal tellurium and α-phase of tellurium oxide. The electrical properties of the films were studied, for different electrode contact configurations, in dark condition and under white light illumination varying the optical power density from 2 to 170 mW/cm(2) and turning the light on and off cyclically. Data analysis shows that the photoconductivity of the film with sandwich contact configuration is a linear function of the light power density and increases more than 2 orders of magnitude as compared to the photoresponse of the film with coplanar contact configuration.

No MeSH data available.