Solubility Based Identifi cation of Green Solvents for Small Molecule Organic Solar Cells

被引:129
作者
Burgues-Ceballos, Ignasi [1 ,2 ,3 ]
Machui, Florian [1 ]
Min, Jie [1 ]
Ameri, Tayebeh [1 ]
Voigt, Monika M. [4 ]
Luponosov, Yuriy N. [5 ]
Ponomarenko, Sergei A. [5 ,6 ]
Lacharmoise, Paul D. [2 ]
Campoy-Quiles, Mariano [3 ]
Brabec, Christoph J. [1 ,4 ]
机构
[1] Univ Erlangen Nurnberg, Inst Mat Elect & Energy Technol iMEET, D-91058 Erlangen, Germany
[2] Cetemmsa Technol Ctr, Mataro 08302, Spain
[3] Esfera UAB, Inst Ciencia Mat Barcelona ICMAB CSIC, Bellaterra 08193, Spain
[4] Bavarian Ctr Appl Energy Res ZAE Bayern, D-91058 Erlangen, Germany
[5] Russian Acad Sci, Enikolopov Inst Synthet Polymer Mat, Moscow 117393, Russia
[6] Moscow MV Lomonosov State Univ, Moscow 119991, Russia
关键词
organic photovoltaics; small molecule; ink formulations; non-halogenated solvents; Hansen solubility parameters; PERFORMANCE; PARAMETERS; IMPACT;
D O I
10.1002/adfm.201301509
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Replacing halogenated solvents in the processing of organic solar cells by green solvents is a required step before the commercialization of this technology. With this purpose, some attempts have been made, although a general method is yet to be developed. Here, the potential of the Hansen solubility parameters (HSP) analysis for the design of green ink formulations for solution-processed active layer in bulk heterojunction photovoltaic devices based on small molecules is demonstrated. The motivation of moving towards organic small molecules stems from their lower molecular weight and more definite structure which makes them more likely to be dissolved in a wider variety of organic solvents. In the first step, the HSP of selected active materials are determined, namely, the star-shaped D--A tris{4-[5-(1,1-dicyanobut-1-en-2-yl)-2,2-bithiophen-5-yl]phenyl}amine N(Ph-2T-DCN-Et)(3) small molecule and fullerene derivative [6,6]-phenyl-C-71-butyric acid methyl ester (PC70BM). Secondly, computer simulations based on HSP allow the prediction of suitable green solvents for this specific material system. The most promising green solvents, according to the simulations, are then used to fabricate solar cell devices using pristine solvents and two solvents mixtures. These devices show power conversion efficiencies around 3.6%, which are comparable to those obtained with halogenated solvents. This good performance is a result of the sufficient solubility achieved after a successful prediction of good (green) solvents.
引用
收藏
页码:1449 / 1457
页数:9
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