黑枸杞与石墨烯纳米片在染料敏化太阳能电池中的应用

doi:10.15541/jim20160160

无机材料学报 ›› 2016, Vol. 31 ›› Issue (10): 1117-1122.DOI: 10.15541/jim20160160

黑枸杞与石墨烯纳米片在染料敏化太阳能电池中的应用

谢寿东¹, 王刚², 陈慧媛¹, 林红^1,3, 闫志男¹, 张慧¹

(1. 青海大学化工学院, 西宁 810016; 2. 青海民族大学物理与电子信息工程学院, 西宁 810007; 3. 清华大学材料学院, 新型陶瓷与精细工艺国家重点实验室, 北京 100084)

收稿日期:2016-03-21 修回日期:2016-05-10 出版日期:2016-10-20 网络出版日期:2016-09-23
作者简介:谢寿东(1992–), 男, 硕士研究生. E-mail: xsd920@163.com
基金资助:
国家自然科学基金(51362025);清华大学新型陶瓷与精细工艺国家重点实验室开放课题(KF201406);青海省昆仑学者计划;教育部春晖计划(Z201539)

Lycium ruthenicum Murray and Graphene Nanoplates for Dye Sensitized Solar Cell

XIE Shou-Dong¹, WANG Gang², CHEN Hui-Yuan¹, LIN Hong^1,3, YAN Zhi-Nan¹, ZHANG Hui¹

(1. College of Chemical Engineering, Qinghai University, Xining 810016, China; 2. College of Physics and Electronic Engineering, Qinghai Nationalities University, Xining 810007, China; 3. State Key Laboratory of New Ceramics & Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China)

Received:2016-03-21 Revised:2016-05-10 Published:2016-10-20 Online:2016-09-23
About author:XIE Shou-Dong. E-mail: xsd920@163.com
Supported by:
National Natural Science Foundation of China(51362025);Key Laboratory of New Ceramics and Fine Processing, Tsinghua University(KF201406);Kunlun Scholar Program of Qinghai;Parental affection plan project(Z201539)

摘要/Abstract

摘要：

从高原黑枸杞中提取染料, 利用紫外-可见吸收光谱和循环伏安方法研究不同pH染料的光电化学性能, 确定染料最佳pH。以石墨烯为原料制备不同含量乙基纤维素(EC)的石墨烯纳米片(GNs)对电极, 用电化学阻抗、循环伏安、塔菲尔极化曲线研究不同EC含量对GNs对电极电催化性能的影响。以最佳pH染料为光敏剂, 不同含量EC的GNs为对电极组装染料敏化太阳能电池在模拟太阳光下测试光电转换效率。结果表明, EC含量为10wt%时, GNs对电极有良好的电催化性。光电测试EC含量为10wt%的GNs对电极光电转换效率为0.92%, 接近Pt对电极(0.99%)。

关键词: 染料敏化太阳能电池, 黑枸杞, 石墨烯纳米片对电极, 光电转换效率

Abstract:

The natural dye was extracted from Lycium ruthenicum Murray which was cultivated in Tibetan Plateau. The UV-Vis absorption spectra and cyclic voltammetry were used to characterize the dyes and confirm the optimal pH of the dye solutions. The influence of different contents of ethyl cellulose(EC) on the performance of electric catalytic of graphene nanoplates(GNs) counter electrode were investigated through electrochemical impedance spectra, cyclic voltammetry and Tafel polarization curve. DSCs were assembled by using the natural pigments with optimal pH as sensitizers and the GNs counter electrode with different contents of EC as counter electrode. It was found that the GNs counter electrode with 10wt% EC achieved the best performance of electric catalytic. The highest power conversion efficiency of the GNs counter electrode with 10wt% EC was 0.92%, close to that of Pt counter electrode (0.99%).

Key words: dye-sensitized solar cell, Lycium ruthenicum Murray, graphene nanoplates counter electrode, photoelectric conversion efficiency

中图分类号:

TQ174

谢寿东, 王刚, 陈慧媛, 林红, 闫志男, 张慧. 黑枸杞与石墨烯纳米片在染料敏化太阳能电池中的应用[J]. 无机材料学报, 2016, 31(10): 1117-1122.

XIE Shou-Dong, WANG Gang, CHEN Hui-Yuan, LIN Hong, YAN Zhi-Nan, ZHANG Hui. Lycium ruthenicum Murray and Graphene Nanoplates for Dye Sensitized Solar Cell[J]. Journal of Inorganic Materials, 2016, 31(10): 1117-1122.

图/表 12

图 1 不同pH黑枸杞染料的紫外-可见吸收光谱图

Fig. 1 UV-Vis absorption spectra of lycium pigment from ruthenicum murray under different pH

表1 不同pH染料的电化学参数

Table 1 Electrochemical data of pigment from Lycium ruthenicum Murray under different pH

Dye	λ₀/nm	E_g/eV	E_ox/V	HOMO/eV	LUMO/eV
pH=1	623	1.99	1.12	-5.52	-3.53
pH=3	636	1.95	1.15	-5.55	-3.60
pH=5	614	2.02	1.03	-5.43	-3.41
pH=7	608	2.04	1.05	-5.46	-3.42

图2 不同pH染料的循环伏安曲线

Fig. 2 Cyclic voltammogram curves of pigment from Lycium ruthenicum Murray under different pH

图 3 不同pH染料的能级示意图

Fig. 3 Energy level digram of sensitized with dyes under different pH

图4 不同对电极的SEM照片

Fig. 4 SEM images of different counter electrodes (a) GNs/EC(5wt%); (b) GNs/EC(10wt%); (c) GNs/EC(15wt%)

图5 不同对电极的SEM断面照片

Fig. 5 Section SEM images of different counter electrodes (a) GNs/EC(5wt%); (b) GNs/EC(10wt%); (c) GNs/EC(15wt%)

图6 不同对电极的电化学阻抗谱

Fig. 6 Electrochemical impedance spectra of different counter electrodes

表2 不同对电极EIS参数

Table 2 EIS parameters of different counter electrodes

Sample	R_s/Ω	R_ct/Ω	E_p/V
Pt	4.51	7.64	1.03
GNs/EC(5wt%)	5.53	11.27	1.08
GNs/EC(10wt%)	4.52	9.12	1.05
GNs/EC(15wt%)	4.36	12.95	1.12

图7 不同对电极的循环伏安曲线

Fig. 7 Cyclic voltammogram curves of different counter electrodes

图8 不同对电极的塔菲尔极化曲线

Fig. 8 Tafel curves of different counter electrodes

图9 不同对电极下黑枸杞染料的电流-电压曲线

Fig. 9 Current-potential (J-V) curve of different counter electrodes using pigment from Lycium ruthenicum Murray as sensitizer

表3 不同对电极下黑枸杞染料的光电性能参数

Table 3 Parameters of DSSCs based on different counter electrodes using pigment from Lycium ruthenicum Murray as sensitizer

Dye	J_SC/(mA^.cm^-2)	V_oc/V	FF	η/%
Pt	2.74	0.532	0.68	0.99
GNs/EC(5wt%)	2.49	0.530	0.62	0.82
GNs/EC(10wt%)	2.72	0.529	0.64	0.92
GNs/EC(15wt%)	2.26	0.528	0.66	0.79

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黑枸杞与石墨烯纳米片在染料敏化太阳能电池中的应用

Lycium ruthenicum Murray and Graphene Nanoplates for Dye Sensitized Solar Cell

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