Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Backcontact CdSe/CdTE Windowless Solar Cells



Donguk Kim, Carlos M. Hangarter, Ratan K. Debnath, Jong Y. Ha, Carlos R. Beauchamp, Matthew D. Widstrom, Jonathan E. Guyer, Nhan Van Nguyen, B. Y. Yoo, Daniel Josell


This paper details the fabrication and properties of CdSe/CdTe thin film photovoltaic devices with a dual back contact geometry. Device fabrication involves cadmium selenide electrodeposition on one of two interdigitated electrodes on a pre-patterned substrate followed by CdTe electrodeposition over the entire structure so that both electrodes are behind the active portion of the device. In contrast to traditional planar devices, illumination is on the electrode-free CdTe surface rather than through a window layer. Like previously detailed back-contact devices for other materials systems, all light that impinges on the device thus reaches the CdTe absorber, the surface being free of metallic electrodes, transparent conductors and window layers. Device efficiency of 2% under simulated air mass 1.5 illumination for feature spacing of 2 um is similar to that of three-dimensionally patterned CdS/CdTe devices having standard front and back contacts with similar feature height but much smaller 0.5 um spacing detailed by other groups.
Solar Energy Materials


Kim, D. , Hangarter, C. , Debnath, R. , Ha, J. , Beauchamp, C. , Widstrom, M. , Guyer, J. , Nguyen, N. , Yoo, B. and Josell, D. (2013), Backcontact CdSe/CdTE Windowless Solar Cells, Solar Energy Materials, [online], (Accessed June 18, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created January 31, 2013, Updated October 12, 2021