Hybrid TiO2-Graphene nanoribbon photoanodes to improve the photoconversion efficiency of dye sensitized solar cells

被引：39

作者：

Akilimali, Rusoma ^{[1
]}

Selopal, Gurpreet Singh ^{[1
,2
]}

Benetti, Daniele ^{[1
]}

Serrano-Esparza, Ines ^{[3
,4
]}

Algarabel, Pedro A. ^{[3
,4
]}

Maria De Teresa, Jose ^{[3
,4
,5
]}

Wang, Zhiming M. ^{[2
]}

Stansfield, Barry ^{[1
]}

Zhao, Haiguang ^{[6
,7
]}

Rosei, Federico ^{[1
,2
]}

机构：

[1] Inst Natl Rech Sci, Ctr Energie Mat & Telecommun, 1650 Boul Lionel Boulet Varennes, Varennes, PQ J3X 1S2, Canada

[2] Univ Elect Sci & Technol China, Inst Fundamental & Frontier Sci, Chengdu 610054, Peoples R China

[3] Univ Zaragoza, CSIC, ICMA, E-50009 Zaragoza, Spain

[4] Univ Zaragoza, CSIC, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain

[5] Univ Zaragoza, INA, LMA, Zaragoza 50018, Spain

[6] Qingdao Univ, Coll Phys, 308 Ningxia Rd, Qingdao 266071, Peoples R China

[7] Qingdao Univ, Cultivat Base State Key Lab, 308 Ningxia Rd, Qingdao 266071, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2018年 / 396卷

基金：

加拿大创新基金会; 加拿大自然科学与工程研究理事会;

关键词：

Graphene nanoribbons; Dye sensitized solar cells; TiO2-GNR hybrid photoanodes; Electron transport; Carrier recombination; MULTICOMPONENT SOLUBILITY PARAMETERS; GRAPHENE NANORIBBONS; INTERFACIAL RECOMBINATION; PHOTOVOLTAIC PERFORMANCE; COMPOSITE PHOTOANODES; NANOTUBE ARRAYS; PERMITTIVITY;

D O I：

10.1016/j.jpowsour.2018.06.044

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report the effect of incorporating different loadings of graphene nanoribbons (GNR) into a standard photoanode made of TiO2 sensitized with dye molecules. The GNRs are observed to significantly improve the photoconversion efficiency (PCE) of dye-sensitized solar cells (DSSCs). The TiO2-GNR hybrid photoanodes were prepared using the doctor-blade method. The presence of GNR in the composite photoanode was characterized by scanning electron microscopy, transmission electron microscopy and Raman spectroscopy. Our results highlight that, at an optimum loading of 0.005 wt%, GNR increases the PCE of DSSCs up to values 20% higher than the PCE of control devices. This improvement is mainly attributed to improved dye loading, enhanced electron lifetime and reduced carrier recombination, as confirmed by quantitative measurements of dye loading, transient photovoltage decay and electrochemical impedance spectroscopy results, respectively.

引用

页码：566 / 573

页数：8

共 56 条

[1] Enhanced photovoltaic properties in graphitic carbon nanospheres networked TiO2 nanocomposite based dye sensitized solar cell [J].