PtCoFe Nanowire Cathodes Boost Short-Circuit Currents of Ru(II)-Based Dye-Sensitized Solar Cells to a Power Conversion Efficiency of 12.29%

被引：75

作者：

Chiang, Chin-Cheng ^{[1
]}

Hung, Chang-Yu ^{[1
]}

Chou, Shang-Wei ^{[1
]}

Shyue, Jing-Jong ^{[2
]}

Cheng, Kum-Yi ^{[1
]}

Chang, Pei-Jen ^{[1
]}

Yang, Ya-Yun ^{[3
]}

Lin, Ching-Yen ^{[3
]}

Chang, Ting-Kuang ^{[4
,5
]}

Chi, Yun ^{[4
,5
]}

Chou, Hung-Lung ^{[6
]}

Chou, Pi-Tai ^{[7
]}

机构：

[1] Natl Taiwan Univ, Dept Chem, Taipei 10617, Taiwan

[2] Natl Taiwan Univ, Dept Mat Sci & Engn, Taipei 10617, Taiwan

[3] Natl Taiwan Univ, Instrumentat Ctr, Taipei 10617, Taiwan

[4] Natl Tsing Hua Univ, Dept Chem, Hsinchu 30013, Taiwan

[5] Natl Tsing Hua Univ, Low Carbon Energy Res Ctr, Hsinchu 30013, Taiwan

[6] Natl Taiwan Univ Sci & Technol, Grad Inst Appl Sci & Technol, Taipei 106, Taiwan

[7] Natl Taiwan Univ, Dept Chem, Ctr Emerging Mat & Adv Devices, Taipei 10617, Taiwan

来源：

ADVANCED FUNCTIONAL MATERIALS | 2018年 / 28卷 / 03期

关键词：

counter electrodes; dye-sensitized solar cells; PtCoFe alloy nanowires; Ru(II)-based dyes; triiodide reduction; IODIDE REDUCTION ACTIVITY; FREE COUNTER ELECTRODE; OXYGEN REDUCTION; NANOPARTICLES; PERFORMANCE; SIZE; NI; NANOSTRUCTURES; THIOCYANATE; CATALYSTS;

D O I：

10.1002/adfm.201703282

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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 I-3(-) 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 Pt33Co24Fe43 nanowire, 8.33% for Pt74Co12Fe14 nanowire, and 9.26% for Pt49Co23Fe28 nanowire in comparison to the PCE of Pt CE (7.32%). Further, the PRT-22 DSSC with Pt49Co23Fe28 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-/I(3)(-)redox reaction. Theoretical work on the adsorption energies of I-2, the desorption energies of I-, and the corresponding absolute energy demonstrates that the I-3(-) reduction activity followed in the order of Pt49Co23Fe28(111) plane > Pt74Co12Fe14(111) plane > Pt33Co24Fe43(111) plane, proving Pt49Co23Fe28 nanowire to be a superior cathode material for DSSCs.

引用

页数：9

共 48 条

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