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Title: High-Efficiency, Flexible CdTe Solar Cells on Ultra-Thin Glass Substrates; Article No. 133501

Authors:
; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1220675
Report Number(s):
NREL/JA-5K00-63598
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 13
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE; Flexible CdTe; photovoltaic cells; II-VI semiconductor materials

Citation Formats

Mahabaduge, H. P., Rance, W. L., Burst, J. M., Reese, M. O., Meysing, D. M., Wolden, C. A., Li, J., Beach, J. D., Gessert, T. A., Metzger, W. K., Garner, S., and Barnes, T. M. High-Efficiency, Flexible CdTe Solar Cells on Ultra-Thin Glass Substrates; Article No. 133501. United States: N. p., 2015. Web. doi:10.1063/1.4916634.
Mahabaduge, H. P., Rance, W. L., Burst, J. M., Reese, M. O., Meysing, D. M., Wolden, C. A., Li, J., Beach, J. D., Gessert, T. A., Metzger, W. K., Garner, S., & Barnes, T. M. High-Efficiency, Flexible CdTe Solar Cells on Ultra-Thin Glass Substrates; Article No. 133501. United States. doi:10.1063/1.4916634.
Mahabaduge, H. P., Rance, W. L., Burst, J. M., Reese, M. O., Meysing, D. M., Wolden, C. A., Li, J., Beach, J. D., Gessert, T. A., Metzger, W. K., Garner, S., and Barnes, T. M. Mon . "High-Efficiency, Flexible CdTe Solar Cells on Ultra-Thin Glass Substrates; Article No. 133501". United States. doi:10.1063/1.4916634.
@article{osti_1220675,
title = {High-Efficiency, Flexible CdTe Solar Cells on Ultra-Thin Glass Substrates; Article No. 133501},
author = {Mahabaduge, H. P. and Rance, W. L. and Burst, J. M. and Reese, M. O. and Meysing, D. M. and Wolden, C. A. and Li, J. and Beach, J. D. and Gessert, T. A. and Metzger, W. K. and Garner, S. and Barnes, T. M.},
abstractNote = {},
doi = {10.1063/1.4916634},
journal = {Applied Physics Letters},
number = 13,
volume = 106,
place = {United States},
year = {Mon Mar 30 00:00:00 EDT 2015},
month = {Mon Mar 30 00:00:00 EDT 2015}
}
  • Flexible, high-efficiency, low-cost solar cells can enable applications that take advantage of high specific power, flexible form factors, lower installation and transportation costs. Here, we report a certified record efficiency of 16.4% for a flexible CdTe solar cell that is a marked improvement over the previous standard (14.05%). The improvement was achieved by replacing chemical-bath-deposited CdS with sputtered CdS:O and also replacing the high-temperature sputtered ZnTe:Cu back contact layer with co-evaporated and rapidly annealed ZnTe:Cu. We use quantum efficiency and capacitance-voltage measurements combined with device simulations to identify the reasons for the increase in efficiency. Both device simulations and experimentalmore » results show that higher carrier density can quantitatively account for the increased open circuit voltage (V{sub OC}) and Fill Factor (FF), and likewise, the increase in short circuit current density (J{sub SC}) can be attributed to the more transparent CdS:O.« less
  • Cited by 30
  • Flexible glass enables high-temperature, roll-to-roll processing of superstrate devices with higher photocurrents than flexible polymer foils because of its higher optical transmission. Using flexible glass in our high-temperature CdTe process, we achieved a certified record conversion efficiency of 14.05% for a flexible CdTe solar cell. Little has been reported on the flexibility of CdTe devices, so we investigated the effects of three different static bending conditions on device performance. We observed a consistent trend of increased short-circuit current and fill factor, whereas the open-circuit voltage consistently dropped. The quantum efficiency under the same static bend condition showed no change inmore » the response. After storage in a flexed state for 24 h, there was very little change in device efficiency relative to its unflexed state. This indicates that flexible glass is a suitable replacement for rigid glass substrates, and that CdTe solar cells can tolerate bending without a decrease in device performance.« less