Transparent contact development for CdSe top cells in high efficiency tandem structures

  • Mahawala P
  • Vakkalanka S
  • Jeedigunta S
 et al. 
  • 8


    Mendeley users who have this article in their library.
  • 3


    Citations of this article.


Simulations indicate that efficiencies of 25 - 30% can be achieved with CdSe/CIGS thin-film tandem devices. The key to achieving this objective is development of a 16% transparent CdSe device. To address this problem we have been developing transparent contact/CdSe/transparent contact structures deposited on glass/SnO2:F. With these transparent structures we have demonstrated record Jsc's of 17.4 mA/cm2. SnO2 serves as the n contact, and the p contact is ZnSe:Cu. These structures have also exhibited sub band gap transmission of 80%. We have evaluated ZnO and CdS as alternative n contacts and ZnTe as an alternative p contact. Voc's of only 300 mV are being attained with ZnSe:Cu because its Fermi level seems to be near the middle of the band gap of CdSe in spite of favorable valence band alignment. However, using ZnTe:Cu as the p contact we have achieved Voc's up to 575 mV, a new high.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • P. Mahawala

  • S. Vakkalanka

  • S. Jeedigunta

  • C.S. Ferekides

  • D.L. Morel

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free