Kim, Kyungho Park, Ji Eun Park, Eun Su Park, Yun Chang Kim, Joosun Im, Chan Lee, Man-Jong 2024-01-20T10:04:27Z 2024-01-20T10:04:27Z 2021-09-05 2014-03-01 0013-4686 https://pubs.kist.re.kr/handle/201004/127014 CdS and CdSe/CdS quantum dot (QD) sensitizers were assembled onto mesoporous ternary Zn2SnO4 photoanodes using a two-step sequential process of successive ionic layer absorption and reaction (SILAR) and chemical bath deposition (CBD) for QD-cosensitized solar cell applications. The assembled CdS and CdSe QDs were observed using high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), high-resolution TEM (HRTEM), and STEM/energy-dispersive X-ray spectroscopy (EDS) elemental mapping. CdSe/CdS cosensitized Zn2SnO4-based cells showed a higher absorption onset position, a stepwise band-edge level alignment, and, thereby, an improved power conversion efficiency (PCE) of 1.628% under one-sun conditions, which is the best result obtained using mesoporous Zn2SnO4 reported to date. In addition, the effect of a ZnS passivation layer on the photovoltaic performance and aging behavior has been investigated. Electrochemical impedance spectroscopy (EIS) showed that the main role of the ZnS layer is to enhance the aging behavior of the CdSe/CdS/Zn2SnO4 cells by improving the electron lifetime and charge recombination. (C) 2014 Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD HIGHLY EFFICIENT TIO2 NANOPARTICLES CDS PERFORMANCE ELECTRON LAYER ZnS-Passivated CdSe/CdS Co-sensitized Mesoporous Zn2SnO4 Based Solar Cells Article 10.1016/j.electacta.2013.12.168 1 ELECTROCHIMICA ACTA, v.121, pp.223 - 232 ELECTROCHIMICA ACTA 121 223 232 scie scopus 000333778300029 2-s2.0-84893062579 Electrochemistry Electrochemistry Article HIGHLY EFFICIENT TIO2 NANOPARTICLES CDS PERFORMANCE ELECTRON LAYER Zn2SnO4 CdSe/CdS QDs Sensitized solar cells ZnS passivation Electrochemical impedance