Journal
NEW JOURNAL OF CHEMISTRY
Volume 39, Issue 6, Pages 4805-4813Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nj00400d
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Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [2011-0014437]
- National Research Foundation of Korea [2011-0014437] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Herein, we demonstrate for the first time the impact of Mn on PbS and CdS using a simple successive ion layer adsorption and reaction (SILAR) technique on TiO2. The CdS passivation layer over PbS can reduce the recombination of photo-injected electrons with the electrolyte and enhance the overall performance and stability of quantum dot sensitized solar cells (QDSSCs). The doping of Mn has a drastic impact on the host material (PbS/CdS) and can create new energy states that can delay the exciton recombination time and can allow charge separation. The surface roughness and morphology of the PbS/Mn-CdS nanoparticles can be observed from atomic force microscopy images. The performance of the QDSSCs was examined in detail using a polysulfide electrolyte with a copper sulfide (CuS) counter electrode. Under illumination of one sun (AM 1.5 G, 100 mW cm(-2)), the TiO2/PbS/Mn-CdS QDSSCs exhibits a power conversion efficiency (eta) of 3.55%.
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