Lim, Ye Seul Jeong, Jeunghyun Kim, Jin Young Ko, Min Jae Kim, Honggon Kim, BongSoo Jeong, Unyong Lee, Doh-Kwon 2024-01-20T12:03:52Z 2024-01-20T12:03:52Z 2021-09-05 2013-06-13 1932-7447 https://pubs.kist.re.kr/handle/201004/127965 A low-cost, nonvacuum fabrication route for CuInSe2 and CuInS2 thin films is presented. To produce these films, binder-free colloidal precursors were prepared using Cu-In intermetallic nanoparticles that were synthesized via a chemical reduction method. The Cu-In alloy precursor films were transformed to CuInSe2 and CuInS2 by reactive annealing in chalcogen-containing atmospheres at atmospheric pressure. The as-synthesized nanoparticles and the annealed films were characterized by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, energy dispersive X-ray spectrometry, electron probe X-ray micro-analysis, Raman spectroscopy, and Auger electron spectroscopy depth profile measurements to elucidate the phase evolution pathway and the densification mechanism of the Cu-In-Se-S system. Solar cell devices made with CuInSe2 and CuInS2 absorbing layers exhibited power conversion efficiencies of 3.92% and 2.28%, respectively. A comparison of the devices suggested that the microstructure of the absorbing layer had a greater influence on the overall photovoltaic performance than the band gap energy. A diode analysis on the solar cell devices revealed that the high saturation current density and diode ideality factor caused lower open-circuit voltages than would be expected from the band gap energies. However, the diode analysis combined with the microstructural and compositional analysis offered guidance about how to improve the photovoltaic performance of these devices. English American Chemical Society CUINS2 THIN-FILMS ELECTRICAL-PROPERTIES ELECTRONIC-STRUCTURE NANOCRYSTAL INKS INDIUM EFFICIENCY NONVACUUM CHALCOPYRITES FABRICATION DEPOSITION Binder-Free Cu-In Alloy Nanoparticles Precursor and Their Phase Transformation to Chalcogenides for Solar Cell Applications Article 10.1021/jp401637b 1 The Journal of Physical Chemistry C, v.117, no.23, pp.11930 - 11940 The Journal of Physical Chemistry C 117 23 11930 11940 scie scopus 000320640500005 2-s2.0-84879109929 Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article CUINS2 THIN-FILMS ELECTRICAL-PROPERTIES ELECTRONIC-STRUCTURE NANOCRYSTAL INKS INDIUM EFFICIENCY NONVACUUM CHALCOPYRITES FABRICATION DEPOSITION CISe thin film solar cell non-vacuum process printing colloidal precursor