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

9 Jul 2012

Volume 101, Issue 2, Articles (02xxxx)

Issue Cover Spotlight Figure

Appl. Phys. Lett. 101, 023101 (2012); http://dx.doi.org/10.1063/1.4731792 (4 pages)

Feng Wang, Ayan Chakrabarty, Fred Minkowski, Kai Sun, and Qi-Huo Wei
Enlarge Image | Read More
Return to All Sections
back to top
RSS Feeds

Electronic effect of Na on Cu(In,Ga)Se2 solar cells

Dae-Hyung Cho, Kyu-Seok Lee, Yong-Duck Chung, Ju-Hee Kim, Soo-Jeong Park, and Jeha Kim

Appl. Phys. Lett. 101, 023901 (2012); http://dx.doi.org/10.1063/1.4733679 (4 pages) | Cited 2 times

Online Publication Date: 9 July 2012

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We report the effect of Na on the electronic properties of Cu(In,Ga)Se2 (CIGS) thin-film solar cells with a structure of grid/ITO/i-ZnO/CdS/CIGS/Mo/SiOx/soda-lime glass (SLG). The diffusion of Na from the SLG into the CIGS layer was systematically controlled by varying the thickness of SiOx. As the Na content increased, the hole concentration of CIGS was enhanced, while the band-gap was nearly constant, which led to a lower Fermi level in the CIGS towards its valence-band edge. The Na-induced increment in the built-in potential (Vbi) across the n-(ITO/i-ZnO/CdS)/p-CIGS junction yielded an increment of open-circuit voltage that well agreed with the calculated Vbi.
Show PACS
88.40.jn Thin film Cu-based I-III-VI2 solar cells
88.40.hj Efficiency and performance of solar cells
73.61.Le Other inorganic semiconductors
71.20.Nr Semiconductor compounds

Microdome InGaN-based multiple quantum well solar cells

Cheng-Han Ho, Kun-Yu Lai, Chin-An Lin, Guan-Jhong Lin, Meng-Kai Hsing, and Jr-Hau He

Appl. Phys. Lett. 101, 023902 (2012); http://dx.doi.org/10.1063/1.4734380 (4 pages) | Cited 2 times

Online Publication Date: 10 July 2012

Full Text: Read Online (HTML) | Download PDF

Show Abstract
InGaN-based multiple quantum well (MQW) solar cells (SCs) employing the p-GaN microdome were demonstrated to significantly boost the conversion efficiency by 102%. The improvements in short-circuit current density (Jsc, from 0.43 to 0.54 mA/cm2) and fill factor (from 44% to 72%) using the p-GaN microdome are attributed to enhanced light absorption due to surface reflection suppression. The concept of microdome directly grown during SC epitaxial growth preserving mechanical robustness and wafer-scale uniformity proves a promising way in promoting the photovoltaic performances of SCs without any additional process.
Show PACS
88.40.hj Efficiency and performance of solar cells

P-type doping of lithium peroxide with carbon sheets

Yufeng Zhao, Chunmei Ban, Joongoo Kang, Shriram Santhanagopalan, Gi-Heon Kim, Su-Huai Wei, and Anne C. Dillon

Appl. Phys. Lett. 101, 023903 (2012); http://dx.doi.org/10.1063/1.4733480 (4 pages) | Cited 2 times

Online Publication Date: 10 July 2012

Full Text: Read Online (HTML) | Download PDF

Show Abstract
The interaction of lithium peroxide (Li2O2) with carbon electrodes in Li-air batteries is studied with model systems of graphene-intercalated Li2O2, using density functional theory (DFT) methods. Although both the Li2O2 bulk and its stoichiometric surface structures (without single O atoms) are insulating, the incorporation of graphene sheets into the Li2O2 introduces hole states in the oxygen orbitals due to the electron transfer from the anti-bonding O2 orbitals to the graphene sheets. This indicates that carbon sheets not only provide conducting channels by themselves, but they also open new channels in Li2O2.
Show PACS
88.80.ff Batteries
82.47.-a Applied electrochemistry
82.45.Fk Electrodes
Return to All Sections
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close