Home | Thin Film PV | Cadmium Telluride (CdTe) | Flexible CdTe thin-film solar cells reach efficiency of 12.4%

Flexible CdTe thin-film solar cells reach efficiency of 12.4%

Font size: Decrease font Enlarge font

An efficiency of 12.4% has been reached with flexible cadmium telluride (CdTe) thin-film solar cells by EMPA, the Swiss Federal Laboratories for Materials Testing and Research in Dubendorf, Switzerland

The laboratory for Thin Films and Photovoltaics attached flexible CdTe thin-film solar cells on a lightweight polyimide film by using low temperatures (<450°C) vacuum evaporation process to grow cadmium sulphide/cadmium telluride (CdS/CdTe) layers and a subsequent annealing step in air where the materials are heated up and cooled down to harden them.

The researchers used zinc oxide doped on aluminium (ZnO:Al) as a transparent electric contact instead of the expensive indium tin oxide (ITO) layer used in earlier 11.4% solar cells.

In addition to being cheaper, the ZnO/ZnO:Al bi-layer improved process yield and reproducibility of high efficiency solar cells, EMPA says.

The 12.4% efficiency of the flexible thin-film solar cells was measured under standard AMI.5 illumination condition. The parameters were Voc = 823 mV, Jsc = 19.6 mA.cm-2, FF = 76.5%.

EMPA says all the process steps of the flexible thin-film solar cells are compatible with continuous in-line processing and can be transferred to roll-to-roll manufacturing of large area solar modules with high deposition speed.

“Such high efficiency flexible CdTe solar cells can become a low cost option for cost-effective solar electricity generation in near future,” EMPA concludes.

Share/Bookmark

Subscribe to comments feed Comments (0 posted):

total: | displaying:

Post your comment comment

Please enter the code you see in the image:

Member Login Box
Translation Tool
Article Tools
  • email Email to a friend
  • print Print version
  • Plain text Plain text
  • Publish my own news Submit an article
  • Share/Bookmark
Tags
No tags for this article
Submit your story
Click here to
Navigate archive
first first July, 2014 first first
Su Mo Tu We Th Fr Sa
1 2 3 4 5
6 7 8 9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28 29 30 31
Poll: PV Platform
What PV platform do you use most often?