Combinatorial Study of MZO Emitters for CdTe-Based Solar Cells

Andriy Zakutayev, Matthew Reese, Yegor Samoilenko, Gavin Yeung, Colin Wolden

Research output: Contribution to conferencePaperpeer-review

4 Scopus Citations


Precise band alignment at the front interface of CdTe-based solar cells is necessary to reduce photoexcited charge carrier recombination and to enable higher energy conversion efficiencies. Magnesium zinc oxide is not only transparent but also offers the ability to tune the conduction band offset with CdTe at the front of the device stack. In this work, we describe reactive sputtering of Mg1-xZnxO using metal targets and its application in CdTe photovoltaics. Combinatorial libraries of Mg1-xZnxO were created to tune the conduction band alignment for the optimal performance of CdTe solar cells. Band gap variation of more than 0.4 eV is achieved across a 3-inch substrate. Kelvin probe measurements demonstrate variance of work function across the substrate. Device performance is optimized at band gaps of 3.5 eV for the CdTe device processing conditions employed in this study.

Original languageAmerican English
Number of pages5
StatePublished - Jun 2019
Event46th IEEE Photovoltaic Specialists Conference, PVSC 2019 - Chicago, United States
Duration: 16 Jun 201921 Jun 2019


Conference46th IEEE Photovoltaic Specialists Conference, PVSC 2019
Country/TerritoryUnited States

Bibliographical note

Publisher Copyright:
© 2019 IEEE.

NREL Publication Number

  • NREL/CP-5K00-76336


  • band alignment
  • buffer layer
  • cadmium telluride
  • Kelvin probe
  • magnesium zinc oxide


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