基于介孔TiO2/石墨烯修饰的TiO2纳米线光阳极的染料敏化太阳能电池

doi:10.15541/jim20150035

摘要/Abstract

摘要：

本工作制作了基于介孔TiO₂/石墨烯修饰的TiO₂纳米线光阳极的染料敏化太阳能电池,并进行表征。光阳极结合了介孔TiO₂的高染料吸附率,TiO₂纳米线的高载流子传导率和石墨烯的高电子收获能力等优点,使器件光电转换效率有了很大的提高。制作出的染料敏化太阳能电池光电转换效率高达7.58%,比纯纳米线制作的电池约提高了1.5倍,在拥有相似一维结构的染料敏化太阳能电池中具有较大优势。

关键词: 掺染料敏化太阳能电池, TiO2纳米线, 介孔TiO2, 石墨烯

Abstract:

Novel hybrid dye-sensitized solar cells (DSSCs) were fabricated and characterized, employing a composite photoanode of TiO₂ nanowires infiltrated with graphene-decorated mesoporous TiO₂. Combining the merits of the high dye loading of mesoporous TiO₂, high light harvesting capability with the carrier transport of TiO₂ nanowires and the high electron collection efficiency from graphene, the overall performance of such photoanode was significantly improved. The obtained DSSCs showed a power conversion efficiency of up to 7.58%, about 1.5 times higher than the pristine TiO₂ nanowires, which was quite competitive compared with the similar 1D structured photoanode of DSSCs.

Key words: DSSCs, TiO2 nanowires, mesoporous TiO2, graphene

中图分类号:

TQ174

陈盎然，赵伟，崔厚磊，支键，黄富强. 基于介孔TiO₂/石墨烯修饰的TiO₂纳米线光阳极的染料敏化太阳能电池[J]. 无机材料学报, 2015, 30(8): 891-896.

CHEN Ang-Ran, ZHAO Wei, CUI Hou-Lei, ZHI Jian, HUANG Fu-Qiang. TiO₂ Nanowires Infiltrated with Graphene-decorated Mesoporous TiO₂ for Enhanced Dye-sensitized Solar Cell[J]. Journal of Inorganic Materials, 2015, 30(8): 891-896.

图/表 10

Fig. 1 Cross-sectional FESEM images of TNWs (a), cross- sectional (b) and top-sectional (c) FESEM of TNWs/GMT after one cycle infiltration, and cross-sectional FESEM of TNWs/ GMT after 5 cycles infiltration (d)

Fig. 2 XRD patterns of TNWs and FTO(a) , as well as MT and GMT composites (b)

Fig. 3 Raman spectrum of GMT composites

Fig. 4 Electrochemical impedance spectroscopy and electrical property (a) Nyquist plots of the impedance data of the DSSCs with anodes made of TNWs, TNWs/MT and TNWs/GMT. (b) Mott-Schottky patterns of TNWs/MT and TNWs/GMT

Fig. 5 J-V characteristics of DSSC solar cells with different photoanodes

Table 1 Solar cell parameters of cells*

Sample	V_oc	J_sc /(mA·cm^-2)	Fill factor/%	Efficiency/%	Thickness/μm
TNWs	0.69	7.4	59	3.04	2.46
TNWs/MT	0.67	16.7	53	6.00	2.57
TNWs/GMT	0.67	18.3	61	7.58	2.59

Scheme 1 Electron transport in TNWs/MT (a) and TNWs/ GMT nanocomposites films cast on FTO (b)

Fig. 6 IPCE curves of TNWs, TNWs/MT and TNWs/GMT

Fig. S1 TEM image of GMT

Fig. S2 N2 desorption and adsorption of TNWs/GMT

参考文献 39

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基于介孔TiO₂/石墨烯修饰的TiO₂纳米线光阳极的染料敏化太阳能电池

TiO₂ Nanowires Infiltrated with Graphene-decorated Mesoporous TiO₂ for Enhanced Dye-sensitized Solar Cell

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