期刊
NANO ENERGY
卷 30, 期 -, 页码 867-876出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2016.09.001
关键词
Tellurium (Te)-doped graphene nanoplatelets; Ball-milling; Electrocatalysts; Cobalt reduction reaction; Charge-transfer resistance; Dye-sensitized solar cells
类别
资金
- Creative Research Initiative (CRI) through National Research Foundation (NRF), Republic of Korea [2014R1A3A2069102]
- National Research Foundation (NRF), Republic of Korea [2013R1A1A205841]
- BK21 Plus programs through National Research Foundation (NRF), Republic of Korea
- NRF [2014R1A2A1A10051630]
- Korean Institute of Energy Technology Evaluation and Planning (KETEP), Republic of Korea [20148520011250]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20148520011250] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2014R1A2A1A10051630] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
One feasible alternative to Pt catalyst in dye-sensitized solar cells (DSSCs) is metalloid tellurium (Te)-doped graphene nanoplatelets (TeGnPs). These were prepared by ball-milling graphite in the presence of Te crystals. Introduction of Te at the edges of TeGnPs was confirmed with various analytical techniques including time of flight secondary ion mass spectrometry (TOF-SIMS). The resultant TeGnPs are herein evaluated as counter electrode (CE) materials for the cobalt reduction reaction (CRR) in DSSCs. TeGnP-CE exhibits much lower charge transfer resistance (R-ct=0.15 Omega cm(2)) than that (R-ct=1.77 Omega cm(2)) of Pt-CE. More importantly, TeGnP-CE displays an extreme electrochemical stability for the Co(bpy)(3)(2+/3+) (bpy=2,2'-bipyridine) redox couple even after 1000 potential cycles. The SM315-based DSSC fabricated with TeGnP-CE shows a better power conversion efficiency (PCE=11.58%) than that with Pt-CE (11.03%), suggesting that TeGnP-CE could be one of the best alternatives to Pt-CE in DSSCs. (C) 2016 Elsevier Ltd. All rights reserved.
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