APL Nameplate
  • Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

Flickr Twitter iResearch App Facebook

BROWSE VOLUMES

Year Range: 
Search Issue | RSS Feeds RSS
Previous Issue Next Issue

12 Sep 2011

Volume 99, Issue 11, Articles (11xxxx)

Issue Cover Spotlight Figure

Appl. Phys. Lett. 99, 113501 (2011); http://dx.doi.org/10.1063/1.3634072 (3 pages)

Asif Islam Khan, Debanjan Bhowmik, Pu Yu, Sung Joo Kim, Xiaoqing Pan, Ramamoorthy Ramesh, and Sayeef Salahuddin
Enlarge Image | Read More
Return to All Sections
back to top
RSS Feeds
FREE

Effect of the induced electron traps by oxygen plasma treatment on transfer characteristics of organic thin film transistors

Bo-Chieh Huang and Yow-Jon Lin

Appl. Phys. Lett. 99, 113301 (2011); http://dx.doi.org/10.1063/1.3636411 (3 pages) | Cited 9 times

Online Publication Date: 13 September 2011

Full Text: Read Online (HTML) | Download PDF

Show Abstract
The effect of the induced electron traps by oxygen plasma treatment on transfer characteristics of organic thin film transistors (OTFTs) was researched in this study. From the observed result, the relationship between electron trapping and electrical stability of OTFTs was discussed. It is shown that oxygen plasma treatment may lead to a shift of the threshold voltage towards positive gate-source voltages and an increase in the mobility, resulting from the incorporation of oxygen and the passivation of the defects in the grain-boundary region. It is found that the electrical stability mainly arises from the increased long-lifetime electron-trap density.
Show PACS
85.30.Tv Field effect devices
FREE

Light propagation in single mode polymer nanotubes integrated on photonic circuits

Nolwenn Huby, Jean Luc Duvail, Daphné Duval, David Pluchon, and Bruno Bêche

Appl. Phys. Lett. 99, 113302 (2011); http://dx.doi.org/10.1063/1.3637043 (3 pages)

Online Publication Date: 13 September 2011

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We report the theoretical and experimental study of photonic propagation in organic dielectric nanotubes elaborated by a wetting template method and showing off an aspect ratio as high as 200. Single mode behaviour is theoretically demonstrated without any cut-off conditions. Efficient evanescent coupling between polymer microstructures and nanotubes dispersed on a photonic chip as well as the high confinement and propagation in a single nanotube have been demonstrated. These results show the potential of well-defined one-dimensional nanostructures as building blocks for integrated organic photonic devices. Applications such as sensing and high speed communication are envisaged.
Show PACS
78.66.Qn Polymers; organic compounds
78.67.Ch Nanotubes
78.40.Me Organic compounds and polymers
FREE

The role of mobility in bulk heterojunction solar cells

Feng Xu and Dadong Yan

Appl. Phys. Lett. 99, 113303 (2011); http://dx.doi.org/10.1063/1.3639273 (3 pages) | Cited 2 times

Online Publication Date: 14 September 2011

Full Text: Read Online (HTML) | Download PDF

Show Abstract
In this letter, we employ a three-dimensional master equation calculation to investigate the mobility dependence of bulk heterojunction (BHJ) solar cell performance. By taking energetic disorder and morphology into consideration, we show mobility-enhanced device efficiency with a remarkable charge transport loss induced by molecular disorder and an open circuit voltage loss in high mobility region due to morphological defect-assisted bimolecular recombination. The result suggests that the description of interfacial processes is crucial in the modeling of BHJ photovoltaic devices.
Show PACS
88.40.jp Multijunction solar cells
88.40.hj Efficiency and performance of solar cells
FREE

Near-field multiple scattering effects of plasmonic nanospheres embedded into thin-film organic solar cells

Wei E. I. Sha, Wallace C. H. Choy, Yang G. Liu, and Weng Cho Chew

Appl. Phys. Lett. 99, 113304 (2011); http://dx.doi.org/10.1063/1.3638466 (3 pages) | Cited 10 times

Online Publication Date: 14 September 2011

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We investigate near-field multiple scattering effects of plasmonic nanospheres (NSPs) embedded into organic solar cells (OSCs). When NSPs are embedded into a spacer layer, the near-field scattering from the NSPs shows strong direction-dependent features, which significantly affects the optical absorption. When NSPs are embedded into an active layer, the absorption enhancement is attributed to the interplay between longitudinal and transverse modes supported by the NSP chain. The breakdown of electrostatic scaling law is confirmed by our theoretical model and should be accounted for optical designs of OSCs. The work provides the fundamental physical understanding and design guidelines for plasmonic photovoltaics.
Show PACS
88.40.jr Organic photovoltaics
73.22.Lp Collective excitations
78.20.Ci Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)
78.35.+c Brillouin and Rayleigh scattering; other light scattering
78.66.Bz Metals and metallic alloys
88.40.H- Solar cells (photovoltaics)
FREE

Improved efficiency and lifetime in small molecule organic solar cells with optimized conductive polymer electrodes

Yong Hyun Kim, Christoph Sachse, Martin Hermenau, Karsten Fehse, Moritz Riede, Lars Müller-Meskamp, and Karl Leo

Appl. Phys. Lett. 99, 113305 (2011); http://dx.doi.org/10.1063/1.3634015 (3 pages) | Cited 5 times

Online Publication Date: 15 September 2011

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We report on efficient and stable ITO-free small molecule organic solar cells with conductive poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) electrodes using a post-treatment process, causing selective removal of PSS. The solar cells with post-treated PEDOT:PSS electrodes show significantly improved short circuit current densities and efficiencies compared to untreated devices. Moreover, the removal of PSS by the post-treatment significantly improves the lifetime of devices, which are more resistant to loss of fill factor compared to untreated devices.
Show PACS
88.40.jr Organic photovoltaics
FREE

Plasmonic backscattering enhanced inverted photovoltaics

D. M. N. M. Dissanayake, B. Roberts, and P.-C. Ku

Appl. Phys. Lett. 99, 113306 (2011); http://dx.doi.org/10.1063/1.3640217 (3 pages) | Cited 4 times

Online Publication Date: 16 September 2011

Full Text: Read Online (HTML) | Download PDF

Show Abstract
A plasmonic nanoparticle incorporated inverted organic photovoltaic structure was demonstrated where a monolayer of Ag nanoparticles acted as a wavelength selective reflector. Enhanced light harvesting via plasmonic backscattering into the photovoltaic absorber was observed, resulting in a two-fold improvement in the photocurrent and increased open-circuit voltage. Further, utilizing an optical spacer, the plasmonic backscattering was spectrally controlled, thereby modulating the external quantum efficiency and the photocurrent. Unlike a regular thin-film metallic back reflector, excellent off-resonance optical transmission in excess of 80% was observed from the Ag nanoparticles, making this structure highly suitable for semi-transparent and multi-junction photovoltaic applications.
Show PACS
85.60.-q Optoelectronic devices
Return to All Sections
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close