Akbar, Zico Alaia Lee, Jae-Seon Joh, Han-Ik Lee, Sungho Jang, Sung-Yeon 2024-01-20T07:34:26Z 2024-01-20T07:34:26Z 2021-09-04 2015-02-05 1932-7447 https://pubs.kist.re.kr/handle/201004/125773 Highly efficient fluorine doped tin oxide (FTO)-free counter electrodes (CEs) for dye-sensitized solar cells (DSSCs) are developed by a low amount doping of Pt on carbon nanosheet (CNS)-based charge-collecting electrodes. The low Pt-doped CNS-based CEs were prepared by simple deposition of Pt by a conventional method. The CNSs had a dual function as both highly conducting charge-collecting electrodes (sheet resistance of similar to 40 Omega/sq) and decent electrocatalytic CE layers for iodine reduction. Low Pt doping (using similar to 100 times less Pt than with conventional doping) on a CNS dramatically improved the electrocatalytic activity for the I-3 reduction of the CNSs and the charge transfer resistance at CE/electrolyte interfaces, which was not possible using FTO. The performance of the low-Pt-doped CNS CEs was comparable to that of high (conventional)-Pt-doped FTO CEs. DSSCs using the low-Pt-doped CNS CEs showed a power conversion efficiency (PCE) of 7.56%, whereas those using high-Pt-doped CNS CEs showed a PCE of 8.05%. In contrast, DSSCs using low-Pt-doped FTO CEs showed a PCE of 4.50%, whereas those using high-Pt-doped FTO CEs showed a PCE of 8.21%. Pt/CNS is an intriguing CE material that can use 100 times less Pt than conventional Pt/FTO CEs, which suggests a useful strategy for reducing the fabrication cost of DSSCs. English American Chemical Society LOW-COST GRAPHENE FILMS PERFORMANCE CONVERSION CATHODES High-Efficiency FTO-Free Counter Electrodes for Dye-Sensitized Solar Cells Based on Low-Pt-Doped Carbon Nanosheets Article 10.1021/jp510871c 1 The Journal of Physical Chemistry C, v.119, no.5, pp.2314 - 2321 The Journal of Physical Chemistry C 119 5 2314 2321 scie scopus 000349136400009 2-s2.0-84949116136 Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article LOW-COST GRAPHENE FILMS PERFORMANCE CONVERSION CATHODES polyacrylonitrile carbon nanosheet dye sensitized solar cell