敏化染料分子长径比对太阳能电池性能的影响

doi:10.7503/cjcu20160302

高等学校化学学报 ›› 2016, Vol. 37 ›› Issue (9): 1669.doi: 10.7503/cjcu20160302

敏化染料分子长径比对太阳能电池性能的影响

任思遥^1,^2,³, 周雪琴^1,^2,³, 刘东志^1,^2,³, 蒋克键⁴, 李巍^1,^2,³, 王丽昌^1,², 汪天洋^1,^2,³()

1. 天津大学化工学院, 天津 300350
2. 天津化学化工协同创新中心, 天津 300350
3. 天津市功能精细化学品技术工程中心, 天津 300350
4. 中国科学院化学研究所绿色印刷实验室, 北京 100190

收稿日期:2016-04-29 出版日期:2016-09-10 发布日期:2016-08-26
作者简介:联系人简介: 汪天洋, 男, 博士, 讲师, 主要从事有机光电材料合成及性能研究. E-mail:wtywtywty1988@126.com
基金资助:
国家自然科学基金(批准号: 21576195, 21506151)和天津市科技创新平台计划项目(批准号: 14TXGCCX0001)资助

Effect of Aspect Ratio of the Dye Molecule on the Properties of Dye Sensitized Solar Cells^†

REN Siyao^1,^2,³, ZHOU Xueqin^1,^2,³, LIU Dongzhi^1,^2,³, JIANG Kejian⁴, LI Wei^1,^2,³, WANG Lichang^1,², WANG Tianyang^1,^2,^3,^*()

1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
2. Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300350, China
3. Tianjin Engineering Research Center of Functional Fine Chemicals, Tianjin 300350, China
4. Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China

Received:2016-04-29 Online:2016-09-10 Published:2016-08-26
Contact: WANG Tianyang E-mail:wtywtywty1988@126.com
Supported by:
† Supported by the National Natural Science Foundation of China(Nos.21576195, 21506151) and the Tianjin Science and Technology Innovation Platform Program, China(No.14TXGCCX0001)

摘要/Abstract

摘要：

采用同一系列但分子长径比不同的3种染料: 2-氰基-3-[2-[4-{2-[4-N,N-二(4-甲基苯基)氨基苯基]乙烯基}-苯基氨基)-嘧啶-5-取代基]-丙烯酸(MTPA-Pyc)、 2-氰基-3-(4-{2-[4-N,N-二(4-甲基苯基)氨基苯基]乙烯基}-苯基)-丙烯酸(MTPAcc)和2-氰基-3-[4-N,N-二(4-甲基苯基)氨基苯基]-丙烯酸(MTPAc), 研究了在不同吸附溶剂中3种染料分子在TiO₂上的吸附量和聚集态, 探讨了敏化染料分子长径比对染料敏化太阳电池性能的影响. 结果表明, MTPAcc具有最合适的分子长径比, 其在TiO₂表面的吸附量及应用的光电性能最高; 吸附溶剂的极性增大有利于提高染料的吸附量, 但也会影响染料分子的聚集态. 当以四氢呋喃为吸附溶剂时, MTPAcc在TiO₂表面的吸附量大且不发生聚集, 对应的敏化太阳能电池器件在所有结果中表现最好, 在490 nm处的单色光光电转化效率(IPCE)极值达到84%, 总光电转化效率(η)达到5.72%.

关键词: 染料敏化太阳能电池, 长径比, 吸附量, 聚集态

Abstract:

Three dyes, 2-cyano-3-[2-(4-{2-[4-N,N-bis(4-methylphenyl)aminophenyl]vinyl}-phenylamino)-pyrimidin-5-yl]-acrylic acid(MTPA-Pyc), 2-cyano-3-(4-{2-[4-N,N-bis(4-methylphenyl)aminophenyl]vinyl}-phenyl)-acrylic acid(MTPAcc), and 2-cyano-3-[4-N,N-bis(4-methylphenyl)aminophenyl]-acrylic acid(MTPAc), that have different aspect ratios were studied for their performances as sensitizer in a dye sensitized solar cell(DSSC). The effects of solvent, the amount of dye molecules adsorbed on the surface of TiO₂, and dye aggregation were investigated. The results show that MTPAcc has the most suitable aspect ratio among the three dyes with the highest and best photovoltaic properties. Polariry of absorption solvents can influence not only the absorbed amount of dyes at TiO₂ but also the dye aggregation. MTPA-Pyc with a large aspect ratio exists in H-aggregation in tolene and tetrahydrofuran, whereas J-aggregation in acetonitrile. MTPAcc was found with high absorption amount at TiO₂ but without aggregation, resulting in the best photovoltaic properties of corresponding DSSC with the incident photon-to-current efficiency(IPCE) of 84% at 490 nm and the photoelectric conversion efficiency(η) of 5.72%. Therefore, the aspect ratio of dye sensitizers is significant for the photovoltaic properties of DSSC.

Key words: Dye sensitized solar cell, Aspect ratio, Absorbed amount, Aggregation

中图分类号:

O646
O621.2

TrendMD:

任思遥, 周雪琴, 刘东志, 蒋克键, 李巍, 王丽昌, 汪天洋. 敏化染料分子长径比对太阳能电池性能的影响. 高等学校化学学报, 2016, 37(9): 1669.

REN Siyao, ZHOU Xueqin, LIU Dongzhi, JIANG Kejian, LI Wei, WANG Lichang, WANG Tianyang. Effect of Aspect Ratio of the Dye Molecule on the Properties of Dye Sensitized Solar Cells^†. Chem. J. Chinese Universities, 2016, 37(9): 1669.

图/表 9

Fig.1 Chemical structures of MTPA-Pyc, MTPAcc and MTPAc

Table 1 Absorbed amount(mol/cm2) of the anchored dyes on TiO2 films in differernt solvents

Dye	Solvent
Dye	THF	MeCN	Toluene
MTPA-Pyc	3.58×10^-7	3.78×10^-7	3.22×10^-7
MTPAcc	4.20×10^-7	7.28×10^-7	4.15×10^-7
MTPAc	1.53×10^-7	1.91×10^-7	1.26×10^-7

Fig.2 Normalized UV-Vis absorption spectra of the dyes in THF(3×10-6 mol/L)(A) and on TiO2 films(sample 1)(B) ε: Molar extinction coefficient at maximum absorption wavelength. a. MTPA-Pyc(ε=36500 L·mol-1·cm-1); b. MTPAcc(ε=37000 L·mol-1·cm-1); c. MTPAc(ε=37500 L·mol-1·cm-1).

Fig.3 Normalized UV-Vis absorption spectra of the dyes in MeCN(3×10-6 mol/L)(A) and on TiO2 films(sample 1)(B) a. MTPA-Pyc(ε=13833 L·mol-1·cm-1); b. MTPAcc(ε=30667 L·mol-1·cm-1); c. MTPAc(ε=36733 L·mol-1·cm-1).

Fig.4 Normalized UV-Vis absorption spectra of the dyes in toluene(3×10-6 mol/L)(A) and on TiO2 films(sample 1)(B) a. MTPA-Pyc(ε=33187 L·mol-1·cm-1); b. MTPAcc(ε=35116 L·mol-1·cm-1); c. MTPAc(ε=30000 L·mol-1·cm-1).

Fig.5 IPCE spectra(A) and J-V curves(B) of DSSCs sensitized in THF a. MTPA-Pyc; b. MTPAcc; c. MTPAc.

Table 2 Photovoltaic performance of DSSCs via differernt solutions

Dye	Solvent	J_sc/(mA·cm^-2)	V_oc/V	FF	η(%)
MTPA-Pyc	THF	9.60	0.71	0.71	4.84
	MeCN	7.27	0.67	0.68	3.31
	Toluene	8.98	0.69	0.68	4.21
MTPAcc	THF	11.52	0.71	0.70	5.72
	MeCN	8.53	0.67	0.68	3.89
	Toluene	10.31	0.71	0.70	5.12
MTPAc	THF	7.71	0.67	0.66	3.41
	MeCN	6.44	0.65	0.62	2.59
	Toluene	7.10	0.68	0.69	3.33

Fig.6 IPCE spectra(A) and J-V curves(B) of DSSCs sensitized in MeCN a. MTPA-Pyc; b. MTPAcc; c. MTPAc.

Fig.7 IPCE spectra(A) and J-V curves(B) of DSSCs sensitized in toluene a. MTPA-Pyc; b. MTPAcc; c. MTPAc.

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敏化染料分子长径比对太阳能电池性能的影响

Effect of Aspect Ratio of the Dye Molecule on the Properties of Dye Sensitized Solar Cells^†

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敏化染料分子长径比对太阳能电池性能的影响

Effect of Aspect Ratio of the Dye Molecule on the Properties of Dye Sensitized Solar Cells†

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Effect of Aspect Ratio of the Dye Molecule on the Properties of Dye Sensitized Solar Cells^†