Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 2, Issue 14, Pages 5087-5094Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ta15202b
Keywords
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Funding
- Converging Research Center Program through the Ministry of Science, ICT and Future Planning, Korea [2013K000187]
- Research and Development Program of the Korea Institute of Energy Research (KIER) [B42421]
- National Research Council of Science & Technology (NST), Republic of Korea [B4-2421] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We previously demonstrated a hybrid ink consisting of synthesized Cu-Se ([Cu] > [Se]) nanoparticles and an indium (In) precursor solution to form CuInSe2 (CIS) thin films. In the precursor solution, monoethanolamine (MEA), which exhibited better performance than a different alkanolamine, triethanolamine (TEA), was used as a chelating agent to bind the In precursor and the Cu-Se nanoparticles. MEA easily forms a complex with Cu in the Cu-Se nanoparticles. To observe the effect of the Cu-MEA complex in the hybrid ink, Cu-rich Cu-Se nanoparticles were washed with MEA to reduce the Cu content in the nanoparticles through the formation of a Cu-MEA complex. As a result, CuInSe2 thin films were obtained at a fabrication temperature that was 80 degrees C lower than usual (530 degrees C). The fabricated devices made at 450 degrees C with hybrid inks of washed Cu-Se or normally synthesized Cu-Se exhibited conversion efficiencies of 5.04% and 1.04%, respectively, which confirmed that the Cu-MEA complex affected the performance of CIS solar cells that were produced with the hybrid ink process.
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