性能增强的双层TiO2复合膜染料敏化太阳能电池

doi:10.15541/jim20160703

无机材料学报 ›› 2017, Vol. 32 ›› Issue (10): 1049-1054.DOI: 10.15541/jim20160703 CSTR: 32189.14.10.15541/jim20160703

性能增强的双层TiO₂复合膜染料敏化太阳能电池

冉慧丽^{1, 2}, 黄浩^{1, 2}, 马梦君^{1, 2}, 翟进生^{1, 2}, 范佳杰^{1, 2}

(郑州大学 1.材料科学与工程学院; 2.国家低碳环保材料智能设计国际联合研究中心, 郑州450001)

收稿日期:2016-12-29 修回日期:2017-02-10 出版日期:2017-10-20 网络出版日期:2017-09-21
作者简介:冉慧丽(1990–), 女, 硕士研究生. E-mail: 1315761852@qq.com
基金资助:
国家自然科学基金(51402263, U1304514)

Dye-sensitized Solar Cells Based on Double-layer Composite Film with Enhanced Photovoltaic Performance

RAN Hui-Li^{1, 2}, HUANG Hao^{1, 2}, MA Meng-Jun^{1, 2}, ZHAI Jin-Sheng^{1, 2}, FAN Jia-Jie^{1, 2}

(1. School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China; 2. International Centre for Designer Low-Carbon and Environmental Materials, Zhengzhou University, Zhengzhou 450001, China)

Received:2016-12-29 Revised:2017-02-10 Published:2017-10-20 Online:2017-09-21
About author:RAN Hui-Li. E-mail: 1315761852@qq.com
Supported by:
National Natural Science Foundation of China (51402263, U1304514)

摘要/Abstract

摘要：

采用水热法制备了一维TiO₂纳米棒阵列、二维TiO₂纳米片和三维TiO₂微球。将TiO₂纳米棒阵列/纳米片-微球双层薄膜应用于染料敏化太阳能电池(DSSC), 研究了TiO₂纳米片与微球的质量比对电池光电性能的影响。采用场发射扫描电镜、氮气吸附脱附等温线、X射线衍射、紫外-可见漫反射光谱、荧光光谱和电化学阻抗谱对样品进行了表征。研究表明, 纳米片与微球的质量比显著影响膜电极的光学和电学特性, 以及电池的光电性能。含50wt% TiO₂纳米片膜电极具有最高的染料吸附量、最强的光吸收、最小的传输电阻和最低的荧光强度。含25wt%、50wt%、75wt%和100wt%纳米片的DSSC的效率分别为1.46%、1.71%、1.26%和1.13%。含50wt% 纳米片的电池具有最优的性能, 这是因为该组分电极具有较好的光吸收特性、较小的载流子复合速率以及较快的电子传输。

关键词: 水热法, TiO₂, 双层膜, 染料敏化太阳能电池(DSSC)

Abstract:

Dye-sensitized solar cells (DSSCs) were fabricated using TiO₂ nanorod arrays as underlayer and hybrid nanosheets-microspheres as overlayer, where 1 dimensional TiO₂ nanorod arrays, 2 dimensional TiO₂ nanosheets, and 3 dimensional TiO₂ microspheres were prepared by hydrothermal method. Nanosheets/microspheres hybrid structures with different weight ratios were fabricated in order to study the structural effect of photoanodes on the solar cell performance. The samples were characterized by field emission scanning electron microscope, N₂ adsorption-desorption isotherms, X-ray diffraction, UV-Vis diffuse reflectance spectra, photoluminescence (PL) spectra, and electrochemical impedance spectroscope. The results showed that both optical and electrical properties of photoanodes and photovoltaic performances of DSSCs were obviously influenced by the weight ratios of nanosheets/microspheres. It was found that the electrode made from 50wt% nanosheets had the largest dye-loading, highest light absorption, smallest inherent resistance, and lowest PL intensity, comparing with those made from other weight ratios of nanosheets. The performances of DSSCs made from 25wt%, 50wt%, 75wt%, and 100wt% nanosheets double-layered electrodes were studied in detail, with corresponding efficiencies of 1.46%, 1.71%, 1.26%, and 1.13%. This can be ascribed to that the cell made from 50wt% nanosheets has strong light absorption, reduced carrier recombination rate, and enhanced electrons transport.

Key words: hydrothermal method, TiO₂, double-layer films, dye-sensitized solar cell (DSSC)

中图分类号:

O643

冉慧丽, 黄浩, 马梦君, 翟进生, 范佳杰. 性能增强的双层TiO₂复合膜染料敏化太阳能电池[J]. 无机材料学报, 2017, 32(10): 1049-1054.

RAN Hui-Li, HUANG Hao, MA Meng-Jun, ZHAI Jin-Sheng, FAN Jia-Jie. Dye-sensitized Solar Cells Based on Double-layer Composite Film with Enhanced Photovoltaic Performance[J]. Journal of Inorganic Materials, 2017, 32(10): 1049-1054.

图/表 8

图1 TiO2纳米棒阵列(a)、纳米片(b)、微球(c)的SEM照片, 纳米片和微球的N2吸附-脱附等温线(d)

Fig. 1 SEM images of TiO2 nanorod arrays (a), nanosheets (b) and microspheres(c), and N2 adsorption-desorption isotherms curves of the nanosheets and microspheres NS and 3D (d)

图2 450℃退火的锐钛矿TiO2、TiO2纳米片、TiO2微球粉末和TiO2纳米棒的XRD图谱

Fig. 2 XRD patterns of the anatase TiO2, TiO2 nanosheets, TiO2 microspheres powders and TiO2 nanorods annealed at 450℃

图3 450℃退火的双层TiO2薄膜的XRD图谱

Fig. 3 XRD patterns of the double-layer TiO2 films annealed at 450℃

图4 双层TiO2光阳极薄膜敏化前后的紫外-可见吸收光谱

Fig. 4 UV-Vis absorption spectra of the double-layer TiO2 photoanode films before and after dye adsorption

图5 双层TiO2光阳极薄膜的荧光光谱

Fig. 5 PL spectra of the double-layer TiO2 photoanode films

图6 双层TiO2光阳极薄膜的阻抗图谱

Fig. 6 EIS curves of the double-layer TiO2 photoanode films

图7 基于双层TiO2光阳极薄膜的DSSC的I-V曲线

Fig. 7 Comparison of the I-V characteristics of DSSCs made from double-layer TiO2 photoanode films

表1 基于双层TiO2光阳极薄膜的DSSC的I-V特性比较

Table 1 Comparison of the I-V characteristics of DSSCs made from double-layer TiO2 photoanode films

Sample	I_sc /(mA•cm^-2)	V_oc/V	FF/%	η/%	Dye adsorbed/ (×10^-7, mol·cm^-2)
25 NS	3.08	0.51	73	1.46	1.56
50 NS	4.89	0.61	57	1.71	2.58
75 NS	3.57	0.64	55	1.26	2.33
100 NS	7.06	0.54	30	1.13	2.38

参考文献 13

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性能增强的双层TiO₂复合膜染料敏化太阳能电池

Dye-sensitized Solar Cells Based on Double-layer Composite Film with Enhanced Photovoltaic Performance

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