Solution-processed bulk heterojunction organic solar cells based on an oligothiophene derivative

Yin, Bin; Yang, Liying; Liu, Yongsheng; Chen, Yongsheng; Qi, Qingjin; Zhang, Fengling; Yin, Shougen

doi:10.1063/1.3460911

Cited by 90 publications

(65 citation statements)

References 23 publications

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“…[1][2][3][4][5] These conjugated molecules have a molecular architecture containing a conjugated backbone to achieve desired optoelectronic properties and alkyl side chains to enable solution processability. To effi ciently absorb solar irradiation, the conjugated backbone usually incorporates chromophoric moieties such as benzoporphyrin, [ 6 ] diketeropyrrolopyrrole (DPP), [7][8][9][10][11] isoindigo, [ 12 , 13 ] squaraine, [14][15][16][17][18] oligothiophene, [19][20][21][22][23] borondipyrromethene, [ 24 , 25 ] and merocyanine. [26][27][28] The conjugation of the backbone is typically extended over several aryl moieties and ended by groups such as vinyl, thienyl, and phenyl derivatives.…”

Section: Introductionmentioning

confidence: 99%

Effects of Heteroatom Substitutions on the Crystal Structure, Film Formation, and Optoelectronic Properties of Diketopyrrolopyrrole‐Based Materials

Liu

Walker

Tamayo

et al. 2012

Adv Funct Materials

176

123

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Substitution of the heteroatoms in the aromatic end‐groups of three diketopyrrolopyrrole containing small molecules is investigated to evaluate how such substitutions affect various physical properties, charge transport, and the performance in bulk heterojunction solar cells. While the optical absorption and frontier orbital energy levels are insensitive to heteroatom substitution, the materials' solubility, thermal properties, film morphology, charge carrier mobility, and photovoltaic performance are altered significantly. Differences in material properties are found to arise from changes in intra‐ and intermolecular interactions in the solid state caused by heteroatom substitution, as revealed by the single crystal structures of three compounds. This study demonstrates a systematic investigation of structure–property relationships in conjugated small molecules.

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Section: Introductionmentioning

confidence: 99%

Effects of Heteroatom Substitutions on the Crystal Structure, Film Formation, and Optoelectronic Properties of Diketopyrrolopyrrole‐Based Materials

Liu

Walker

Tamayo

et al. 2012

Adv Funct Materials

176

123

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“…The thickness of the silica shell is in a range where direct tunneling can occur. The energy band diagram of the p-DTS(FBTTh 2 ) 2 , PC 70 BM, SiO 2 and Au are shown in Fig. S4.…”

Section: Effect Of Au-silica Nanorod Concentrationmentioning

confidence: 99%

“…Solution-processed small-molecule (SM) donors have stimulated much interest as a viable alternative to the widely studied conjugated polymers for organic bulk heterojunction (BHJ) solar cells [1][2][3][4]. Solution-processed SM donors have the advantage over conjugated polymer counterparts since the SM donor molecules are monodisperse and can be purified using reproducible fabrication protocols and therefore provide more uniform performance in SM-based devices [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we incorporated core-shell structured Au-silica NPs into SM solar cells based on 7,7 0 -(4,4-bis(2-ethylhexyl)-4H-silolo [3,2- 2 :PC 70 BM). The two different geometries of NPs, namely nanorod and nanosphere were examined and the geometry effect on SM devices were studied by comparing total light scattering and the quality factor for LSPR.…”

Section: Introductionmentioning

confidence: 99%

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Influence of gold-silica nanoparticles on the performance of small-molecule bulk heterojunction solar cells

Kyaw

Peng

et al. 2015

Organic Electronics

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a b s t r a c tLight trapping by gold (Au)-silica nanospheres and nanorods embedded in the active layer of small-molecule (SM) organic solar cell has been systematically compared. Nanorod significantly outperforms nanosphere because of more light scattering and higher quality factor for localized surface plasmon resonance (LSPR) triggered by nanorods. The optimum concentration of nanorod was characterized by charge carrier transport and morphology of the active layers. At optimum nanorod concentration, almost no change in the morphology of the active layer reveals that LSPR and scattering effects rather than the morphology are mainly responsible for the enhanced power conversion efficiency. In addition, the preliminary lifetime studies of the SM solar cells with and without Au-silica nanorods were conducted by measuring the current density-voltage characteristics over 20 days. The results show that plasmonic device with nanorods has no adverse impact on the device stability.

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“…When using SM21 for the solar cell device characterization, a PCE of 2.45 % was achieve [143]. Through the device optimization, Yin et al reported an enhanced PCE of 3.7 % [144], which is among the best for SM-OPV in 2010. However, the FF of these devices is still low and it may be further improved by changing the molecular structure and optimizing the device fabrication process.…”

Section: Oligothiophenes and Its Derivativesmentioning

confidence: 97%

Donor Materials for Organic Solar Cell (OSC)

Song

2014

Organic and Hybrid Solar Cells

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In the past 10 years, the highest efficiency obtained from organic photovoltaics (OPVs), such as bulk heterojunction (BHJ) polymer solar cells (PSCs), has risen from 2.5 to 11 %, while the solution-processed small molecule (SM) BHJ solar cells arrived at competitive level of 10 %. This rapid progress was achieved by the development of both materials synthesis and device fabrication. With the better understanding of the mechanism of the photon-to-electron conversion process in OPV, the commercialization of PSCs could be realized soon. Nowadays, a lot of efforts have been devoted to developing of new donor, acceptor, and interfacial layer materials, optimizing nanostructures of the active layer, fabricating new device architectures, and so on.The development of new donor materials for PSCs is one of the most popular research topics in the field of PSCs and many excellent results have been published. A variety of polymers and SMs have been reported as donor materials for OPVs and some of them might be candidates for the commercialization later. From the reported structures, the conjugated backbones of polymers for OPV can be arbitrarily classified into a few categories based on the constitution of the repeating unit, namely, (a) homopolymers, (b) donor-acceptor polymers, (c) quinoid polymers, and (d) other types of polymers; whereas the SM donors can be classified into the following categories based on their main structures, (a) donor-acceptor type molecules, (b) squaraine dyes, and (c) oligomer and dendrimers.

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Solution-processed bulk heterojunction organic solar cells based on an oligothiophene derivative

Cited by 90 publications

References 23 publications

Effects of Heteroatom Substitutions on the Crystal Structure, Film Formation, and Optoelectronic Properties of Diketopyrrolopyrrole‐Based Materials

Effects of Heteroatom Substitutions on the Crystal Structure, Film Formation, and Optoelectronic Properties of Diketopyrrolopyrrole‐Based Materials

Influence of gold-silica nanoparticles on the performance of small-molecule bulk heterojunction solar cells

Donor Materials for Organic Solar Cell (OSC)

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