In:
Advanced Functional Materials, Wiley, Vol. 28, No. 3 ( 2018-01)
Abstract:
PtCoFe nanowires with different alloying compositions are chemically prepared and acted as counter electrodes (CEs) in dye‐sensitized solar cells (DSSCs) with Ru(II)‐based dyes. Due to their superior reduction activity, PtCoFe nanowires with rich (111) facets enhance the performance of DSSCs. Hence, N719 DSSCs with PtCoFe nanowires, respectively, produce better power conversion efficiency (PCE) of 8.10% for Pt 33 Co 24 Fe 43 nanowire, 8.33% for Pt 74 Co 12 Fe 14 nanowire, and 9.26% for Pt 49 Co 23 Fe 28 nanowire in comparison to the PCE of Pt CE (7.32%). Further, the PRT‐22 DSSC with Pt 49 Co 23 Fe 28 nanowire exhibits a maximum PCE of 12.29% with a certificated value of 12.0%, which surpass the previous PCE record of the DSSCs with Ru(II)‐based dyes. The photovoltaic and electrochemical results reveal the composition‐dependent activity along with a volcano‐shaped trend in the I − / redox reaction. Theoretical work on the adsorption energies of I 2 , the desorption energies of I − , and the corresponding absolute energy demonstrates that the reduction activity followed in the order of Pt 49 Co 23 Fe 28 (111) plane 〉 Pt 74 Co 12 Fe 14 (111) plane 〉 Pt 33 Co 24 Fe 43 (111) plane, proving Pt 49 Co 23 Fe 28 nanowire to be a superior cathode material for DSSCs.
Type of Medium:
Online Resource
ISSN:
1616-301X
,
1616-3028
DOI:
10.1002/adfm.201703282
Language:
English
Publisher:
Wiley
Publication Date:
2018
detail.hit.zdb_id:
2029061-5
detail.hit.zdb_id:
2039420-2
SSG:
11
Permalink