Toward a 25%-Efficient Polycrystalline Thin-Film Tandem Solar Cell: Practical Issues

R. Noufi, D. L. Young, T. J. Coutts, T. Gessert, J. S. Ward, A. Duda, X. Wu, M. Romero, R. Dhere, J. Abushama

Research output: Contribution to conferencePaperpeer-review

13 Scopus Citations


In this paper, we describe our efforts to date to evaluate possible routes, combination of materials, and device structures toward demonstrating a multijunction polycrystalline thin-film tandem solar cell with efficiency greater than 25%. Our approach uses modeling as a guide to calculate an approximate upper limit of device performance, the range of band gap pairs for top and bottom cells, and the optical resources/losses through the multilayer structure. The combination of materials we chose for the initial study are based on state-of-the-art single junction devices utilizing Cu(In,Ga)Se2 and CdTe absorbers.


Conference3rd World Conference on Photovoltaic Energy Conversion (WCPEC-3): Joint Conference of 13th PV Science and Engineering Conference, 30th IEEE PV Specialists Conference, and 18th European PV Solar Energy Conference
CityOsaka, Japan

NREL Publication Number

  • NREL/CP-520-34145


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