skip to main content

DOE PAGESDOE PAGES

Title: Simultaneous shunt protection and back contact formation for CdTe solar cells with single wall carbon nanotube layers

Thin film photovoltaic (PV) devices and modules prepared by commercial processes can be severely compromised by through-device low resistance electrical pathways. The defects can be due to thin or missing semiconductor material, metal diffusion along grain boundaries, or areas containing diodes with low turn-on potentials. We report the use of single wall carbon nanotube (SWCNT) layers to enable both protection against these defects and back contact formation for CdTe PV devices. Samples prepared with a SWCNT back contact exhibited good efficiency and did not require shunt protection, while devices prepared without shunt protection using a standard metal back contact performed poorly. We describe the mechanism by which the SWCNT layer functions. In addition to avoiding the need for shunt protection by other means, the SWCNT film also provides a route to higher short circuit currents.
Authors:
 [1] ;  [1] ; ORCiD logo [1] ;  [1] ;  [2] ;  [1]
  1. Univ. of Toledo, OH (United States). Wright Center for Photovoltaics Innovation and Commercialization (PVIC), Dept. of Physics and Astronomy
  2. Calyxo USA, Inc., Perrysburg, OH (United States)
Publication Date:
Grant/Contract Number:
EE0005405
Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 107; Journal Issue: 25; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Research Org:
Univ. of Illinois at Urbana-Champaign, IL (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 25 ENERGY STORAGE; Thin films; Photovoltaics; Semiconductors
OSTI Identifier:
1468792
Alternate Identifier(s):
OSTI ID: 1234096

Phillips, Adam B., Khanal, Rajendra R., Song, Zhaoning, Watthage, Suneth C., Kormanyos, Kenneth R., and Heben, Michael J.. Simultaneous shunt protection and back contact formation for CdTe solar cells with single wall carbon nanotube layers. United States: N. p., Web. doi:10.1063/1.4938130.
Phillips, Adam B., Khanal, Rajendra R., Song, Zhaoning, Watthage, Suneth C., Kormanyos, Kenneth R., & Heben, Michael J.. Simultaneous shunt protection and back contact formation for CdTe solar cells with single wall carbon nanotube layers. United States. doi:10.1063/1.4938130.
Phillips, Adam B., Khanal, Rajendra R., Song, Zhaoning, Watthage, Suneth C., Kormanyos, Kenneth R., and Heben, Michael J.. 2015. "Simultaneous shunt protection and back contact formation for CdTe solar cells with single wall carbon nanotube layers". United States. doi:10.1063/1.4938130. https://www.osti.gov/servlets/purl/1468792.
@article{osti_1468792,
title = {Simultaneous shunt protection and back contact formation for CdTe solar cells with single wall carbon nanotube layers},
author = {Phillips, Adam B. and Khanal, Rajendra R. and Song, Zhaoning and Watthage, Suneth C. and Kormanyos, Kenneth R. and Heben, Michael J.},
abstractNote = {Thin film photovoltaic (PV) devices and modules prepared by commercial processes can be severely compromised by through-device low resistance electrical pathways. The defects can be due to thin or missing semiconductor material, metal diffusion along grain boundaries, or areas containing diodes with low turn-on potentials. We report the use of single wall carbon nanotube (SWCNT) layers to enable both protection against these defects and back contact formation for CdTe PV devices. Samples prepared with a SWCNT back contact exhibited good efficiency and did not require shunt protection, while devices prepared without shunt protection using a standard metal back contact performed poorly. We describe the mechanism by which the SWCNT layer functions. In addition to avoiding the need for shunt protection by other means, the SWCNT film also provides a route to higher short circuit currents.},
doi = {10.1063/1.4938130},
journal = {Applied Physics Letters},
number = 25,
volume = 107,
place = {United States},
year = {2015},
month = {12}
}