Effect of auxiliary donors and position of benzothiadiazole on the optical and photovoltaic properties of dithieno[3,2-b:2′,3′-d] pyrrole-based sensitizers

被引:8
作者
Kumar, Sunil [1 ]
Thomas, K. R. Justin [1 ]
Li, Chun-Ting [2 ]
Fan, Miao-Syuan [2 ]
Ho, Kuo-Chuan [2 ]
机构
[1] Indian Inst Technol Roorkee, Dept Chem, Organ Mat Lab, Roorkee, Uttar Pradesh, India
[2] Natl Taiwan Univ, Dept Chem Engn, Taipei 10617, Taiwan
关键词
Organic sensitizers; Dye-sensitized solar cells; Amine donors; Dithienopyrrole; Benzothiadiazole; Electrochemical impedance spectroscopy; D-PI-A; CROSS-COUPLING REACTIONS; ORGANIC-DYES; HIGHLY EFFICIENT; SOLAR-CELLS; CONVERSION-EFFICIENCY; FEATURED SENSITIZERS; NANOCRYSTALLINE TIO2; CHARGE-TRANSPORT; FURAN MOIETY;
D O I
10.1016/j.solener.2020.08.001
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Organic dyes used as sensitizers in dye-sensitized solar cells offer endless opportunities for modulation of cell efficiency through structural diversifications. Despite the countless number of dyes developed, structure-property analysis by varying chromophores and their topology in dyes is useful to formulate design principles. Herein, we report six new organic dyes featuring dithienopyrrole (DTP), benzothiadiazole (BTD) and cyanoacrylic acid units. The effect of auxiliary donors such as triphenylamine or diphenylaminofluorene and the position of benzothiadiazole on the optical and photovoltaic properties were evaluated by appropriate design of dyes. Incorporation of additional donor enhanced the spectral response of the dyes by elongating the conjugation length and supplementing the donor-acceptor interaction. Moving the BTD unit from the position between DTP and acceptor (D-D-A-pi-A) to a position between the auxiliary donor and DTP (D-A-D-A) altered the absorption as well as electrochemical properties. Theoretical calculations revealed that the later molecular configuration ensures sufficient overlap of HOMO and LUMO and facilitate the charge transfer propensity from arylamine donor to acceptor which is beneficial for light harvesting. Among the dyes, a D-A-D-A dye possessing triphenylamine exhibited highest power conversion efficiency (eta = 7.57%). The structure-property relationship is supported by electron transfer kinetics elucidated by electrochemical impedance spectroscopic studies. The best performing dye displayed high charge recombination and sufficiently low charge transfer resistance in the device.
引用
收藏
页码:539 / 547
页数:9
相关论文
共 56 条
[1]   Toward a rational design of poly(2,7-carbazole) derivatives for solar cells [J].
Blouin, Nicolas ;
Michaud, Alexandre ;
Gendron, David ;
Wakim, Salem ;
Blair, Emily ;
Neagu-Plesu, Rodica ;
Belletete, Michel ;
Durocher, Gilles ;
Tao, Ye ;
Leclerc, Mario .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2008, 130 (02) :732-742
[2]   Improving the Performance of Dye-Sensitized Solar Cells [J].
Boschloo, Gerrit .
FRONTIERS IN CHEMISTRY, 2019, 7
[3]   Recent trends in mesoscopic solar cells based on molecular and nanopigment light harvesters [J].
Graetzel, Carole ;
Zakeeruddin, Shaik M. .
MATERIALS TODAY, 2013, 16 (1-2) :11-18
[4]   9-donor-substituted acridizinium salts: Versatile environment-sensitive fluorophores for the detection of biomacromolecules [J].
Granzhan, Anton ;
Ihmels, Heiko ;
Viola, Giampietro .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2007, 129 (05) :1254-1267
[5]   Photoelectrochemical cells [J].
Grätzel, M .
NATURE, 2001, 414 (6861) :338-344
[6]   Dye-sensitized solar cells [J].
Grätzel, M .
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS, 2003, 4 (02) :145-153
[7]   Charge transport versus recombination in dye-sensitized solar cells employing nanocrystalline TiO2 and SnO2 films [J].
Green, ANM ;
Palomares, E ;
Haque, SA ;
Kroon, JM ;
Durrant, JR .
JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (25) :12525-12533
[8]   Dye-Sensitized Solar Cells [J].
Hagfeldt, Anders ;
Boschloo, Gerrit ;
Sun, Licheng ;
Kloo, Lars ;
Pettersson, Henrik .
CHEMICAL REVIEWS, 2010, 110 (11) :6595-6663
[9]   Significant Improvement of Dye-Sensitized Solar Cell Performance by Small Structural Modification in π-Conjugated Donor-Acceptor Dyes [J].
Haid, Stefan ;
Marszalek, Magdalena ;
Mishra, Amaresh ;
Wielopolski, Mateusz ;
Teuscher, Joel ;
Moser, Jacques-E. ;
Humphry-Baker, Robin ;
Zakeeruddin, Shaik M. ;
Graetzel, Michael ;
Baeuerle, Peter .
ADVANCED FUNCTIONAL MATERIALS, 2012, 22 (06) :1291-1302
[10]   A structural study of DPP-based sensitizers for DSC applications [J].
Holcombe, Thomas W. ;
Yum, Jun-Ho ;
Yoon, Junghyun ;
Gao, Peng ;
Marszalek, Magdalena ;
Di Censo, Davide ;
Rakstys, Kasparas ;
Nazeeruddin, Md K. ;
Graetzel, Michael .
CHEMICAL COMMUNICATIONS, 2012, 48 (87) :10724-10726