Solar Cell Contacts Using Nano-Sized Dispersions

Doug Schulz, R. Ribelin, X. Wu, K. M. Jones, R. J. Matson, C. J. Curtis, T. Gessert, D. S. Ginley

Research output: Contribution to conferencePaperpeer-review


Nano-sized dispersions have been employed as precursor inks for the spray deposition of contacts to both Si and CdTe materials. In the case of Si, nano-sized Al particles (nano-Al) were dispersed and spray deposited onto p-type Si. Annealing above the eutectic temperature causes alloy formation yielding a p+ layer with ρ approx. 10-4 Ω·cm. For CdTe, nano-sized Te particles (nano-Te) were dispersed and sprayed onto CdTe/CdS/SnO2glass heterostructures. Contact to the CdTe layer occurred during a 30 min anneal in He (T = 215 to 255°C). These solar cells were finished by spin-coating the Te layer with Ag paint and subsequently annealing in air (100°C / 1 h). This approach produces solar cells with open circuit voltages (Voc) from 720 to 800 mV, short circuit current densities (Jsc) from 18 to 20 mA/cm2 and efficiencies up to 10.3%. The performance of these cells was similar to those produced using the standard NREL contact.

Original languageAmerican English
Number of pages6
StatePublished - 2000
EventThe 1999 MRS Fall Meeting - Symposium F 'Nanophase and Nanocomposite Materials III' - Boston, MA, USA
Duration: 29 Nov 19992 Dec 1999


ConferenceThe 1999 MRS Fall Meeting - Symposium F 'Nanophase and Nanocomposite Materials III'
CityBoston, MA, USA

NREL Publication Number

  • NREL/CP-520-28677


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