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

3 Dec 2012

Volume 101, Issue 23, Articles (23xxxx)

Issue Cover Spotlight Figure

Appl. Phys. Lett. 101, 233101 (2012); http://dx.doi.org/10.1063/1.4749281 (3 pages)

S. A. Studenikin, J. Thorgrimson, G. C. Aers, A. Kam, P. Zawadzki, Z. R. Wasilewski, A. Bogan, and A. S. Sachrajda
Enlarge Image | Read More
Return to All Sections
back to top
RSS Feeds

Aluminum oxide–n-Si field effect inversion layer solar cells with organic top contact

A. S. Erickson, N. K. Kedem, A. E. Haj-Yahia, and D. Cahen

Appl. Phys. Lett. 101, 233901 (2012); http://dx.doi.org/10.1063/1.4769041 (4 pages) | Cited 2 times

Online Publication Date: 3 December 2012

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We demonstrate a solar cell that uses fixed negative charges formed at the interface of n-Si with Al2O3 to generate strong inversion at the surface of n-Si by electrostatic repulsion. Built-in voltages of up to 755 mV are found at this interface. In order to harness this large built-in voltage, we present a photovoltaic device where the photocurrent generated in this inversion layer is extracted via an inversion layer induced by a high work function transparent organic top contact, deposited on top of a passivating and dipole-inducing molecular monolayer. Results of the effect of the molecular monolayer on device performance yield open-circuit voltages of up to 550 mV for moderately doped Si, demonstrating the effectiveness of this contact structure in removing the Fermi level pinning that has hindered past efforts in developing this type of solar cell with n-type Si.
Show PACS
88.40.hj Efficiency and performance of solar cells
88.40.jj Silicon solar cells

Thin-film encapsulation of inverted indium-tin-oxide-free polymer solar cells by atomic layer deposition with improvement on stability and efficiency

Kan Li, Huanhuan Fan, Chaofan Huang, Xia Hong, Xu Fang, Haifeng Li, Xu Liu, Chengshuai Li, Zhuoyin Huang, and Hongyu Zhen

Appl. Phys. Lett. 101, 233902 (2012); http://dx.doi.org/10.1063/1.4769355 (4 pages)

Online Publication Date: 5 December 2012

Full Text: Read Online (HTML) | Download PDF

Show Abstract
Atomic layer deposition (ALD) technology is employed to encapsulate inverted indium-tin-oxide-free polymer solar cells (IFSCs) with a structure of Al/TiOx/P3HT:PC61BM/PEDOT:PSS. The encapsulation layer, Al2O3, is deposited by ALD on the light incident surface. The thickness of the Al2O3 layer can thus be optimized through optical simulation to minimize light loss of IFSCs. Based on optical calculation, we encapsulated the device (85 nm thick active layer) with a 30 nm thick Al2O3 layer. The resulting ALD encapsulated IFSCs show much better device performance and higher stability than the glass-encapsulated ones.
Show PACS
88.40.jr Organic photovoltaics
88.40.hj Efficiency and performance of solar cells

Power losses in bilayer inverted small molecule organic solar cells

Cong Trinh, Jonathan R. Bakke, Thomas P. Brennan, Stacey F. Bent, Francisco Navarro, Andrew Bartynski, and Mark E. Thompson

Appl. Phys. Lett. 101, 233903 (2012); http://dx.doi.org/10.1063/1.4769440 (4 pages)

Online Publication Date: 5 December 2012

Full Text: Read Online (HTML) | Download PDF

Show Abstract
Inverted bilayer organic solar cells using copper phthalocyanine (CuPc) as a donor and C60 as an acceptor with the structure: glass/indium tin oxide (ITO)/ZnO/C60/CuPc/MoO3/Al, in which the zinc oxide (ZnO) was deposited by atomic layer deposition, are compared with a conventional device: glass/ITO/CuPc/C60/bathocuproine/Al. These inverted and conventional devices give short circuit currents of 3.7 and 4.8 mA/cm2, respectively. However, the inverted device gives a reduced photoresponse from the CuPc donor compared to that of the conventional device. Optical field models show that the arrangement of organic layers in the inverted devices leads to lower absorption of long wavelengths by the CuPc donor; the low energy portion of the spectrum is concentrated near the metal oxide electrode in both devices.
Show PACS
88.40.jr Organic photovoltaics
88.40.hj Efficiency and performance of solar cells

Polarization-diverse light absorption enhancement in organic photovoltaic structures with one-dimensional, long-pitch metallic gratings: Design and experiment

Yifen Liu, Rabin Dhakal, Vikram Dalal, and Jaeyoun Kim

Appl. Phys. Lett. 101, 233904 (2012); http://dx.doi.org/10.1063/1.4769896 (4 pages) | Cited 1 time

Online Publication Date: 6 December 2012

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We report the design and experimental realization of an organic photovoltaic device structure that can trap incident light in all polarization states without relying on two-dimensional, short-pitch (<400 nm) gratings. Instead, we utilized easily patternable one-dimensional, long-pitch (>1000 nm) gratings and achieved the polarization diversity through balanced allocation of the plasmonic and guided mode-based light trapping routes to different polarization states. The experimental results showed strong enhancements in light absorption in all polarization states that would translate into a 15%–25% increase in the power conversion efficiency.
Show PACS
88.40.jr Organic photovoltaics
88.40.hj Efficiency and performance of solar cells

Unexpected effect of dye's molar extinction coefficient on performance of back contact dye-sensitized solar cells

Noviana Tjitra Salim, Kun Zhang, Shufang Zhang, and Liyuan Han

Appl. Phys. Lett. 101, 233905 (2012); http://dx.doi.org/10.1063/1.4769897 (4 pages) | Cited 1 time

Online Publication Date: 6 December 2012

Full Text: Read Online (HTML) | Download PDF

Show Abstract
The effect of dyes' molar extinction coefficients (ε) on the performance of back contact dye-sensitized cells (BCDSCs) was studied. Unexpected behavior, which contrasted with that expected for conventional DSCs, was observed. Specifically, a dye with lower ε improved the performance of BCDSCs, whereas a dye with higher ε did not improve the BCDSCs' efficiency, even with increasing TiO2 thickness. Our analysis revealed that BCDSCs with lower ε dye were capable to obtain a more efficient electron collection due to its higher electron generation rate closer to the collecting electrode and shorter electron transport distance, leading to an improved efficiency.
Show PACS
88.40.hj Efficiency and performance of solar cells
88.40.jr Organic photovoltaics
Return to All Sections
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close