2012
DOI: 10.1021/ja303034w
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In Situ Growth of Co0.85Se and Ni0.85Se on Conductive Substrates as High-Performance Counter Electrodes for Dye-Sensitized Solar Cells

Abstract: We present herein a facile one-step low-temperature hydrothermal approach for in situ growth of metal selenides (Co(0.85)Se and Ni(0.85)Se) on conductive glass substrates. The as-prepared metal selenides on conductive substrates can be used directly as transparent counter electrodes for dye-sensitized solar cells (DSSCs) without any post-treatments. It is found that graphene-like Co(0.85)Se exhibits higher electrocatalytic activity than Pt for the reduction of triiodide. As a consequence, the DSSC with Co(0.85… Show more

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Cited by 745 publications
(532 citation statements)
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“…Two pairs of oxidation/reduction peaks are observed in every cyclic voltammogram, in which the left one is corresponding to the redox reaction of I 3 − /I − . As generally accepted, a lower peak-to-peak voltage (V pp ) separation indicates a higher catalytic activity for the counter electrode [20,21]. The V pp reduces monotonically from 0.62 to 0.40 V, indicating continuously enhanced catalytic activities of the hybrid fibers with the increasing platinum contents (inset in Fig.…”
Section: Resultsmentioning
confidence: 79%
“…Two pairs of oxidation/reduction peaks are observed in every cyclic voltammogram, in which the left one is corresponding to the redox reaction of I 3 − /I − . As generally accepted, a lower peak-to-peak voltage (V pp ) separation indicates a higher catalytic activity for the counter electrode [20,21]. The V pp reduces monotonically from 0.62 to 0.40 V, indicating continuously enhanced catalytic activities of the hybrid fibers with the increasing platinum contents (inset in Fig.…”
Section: Resultsmentioning
confidence: 79%
“…[ 42 ] This value is smaller nearly by 1% to those of the Co 0.85 Se ( E ff = 9.40%) and reduced graphene ( E ff = 9.54%). [ 57,58 ] To the best of our knowledge, these are the best two Pt-free counter electrodes showing the highest power conversion effi ciency. [ 49,57,58 ] Based on the reports of metal chalcogenide counter electrodes, it is worthy to investigate the electrocatalytic activity of the NiS as a model MS fi lm for DSSC counter electrode prepared by the proposed protocol.…”
Section: Resultsmentioning
confidence: 97%
“…It has been confirmed that platinum (Pt) is a superior CE material with excellent catalytic activity, high electrical conductivity and stability. Unfortunately, the disadvantages such as the high cost and low abundance greatly restrict the large-scale application of Pt in DSCs [6][7][8][9] . Thus, several Pt-free alternative materials have been explored as CEs in DSCs, such as carbon materials 8,10 , conductive organic polymers 6,11 and inorganic semiconductor materials including metal sulfides 12,13 , metal nitrides 14,15 , metal carbides 16,17 , metal oxides 18 and copper zinc tin sulfide 19 and so on.…”
mentioning
confidence: 99%