A two-dimension-conjugated small molecule for efficient ternary organic solar cells

Zhu, Kai; Tang, Dandan; Zhang, Kaicheng; Wang, Zhaowei; Ding, Lan; Liu, Yanfeng; Yuan, Ligang; Fan, Jian; Song, Bo; Zhou, Yi; Li, Yongfang

doi:10.1016/j.orgel.2017.06.009

Cited by 15 publications

(5 citation statements)

References 57 publications

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“…During the preparation of this paper, we have been made aware that Li's group has recently fabricated fullerene OSCs consisting of DRBDT-TVT and has obtained the highest PCE up to 5.71%. 66 In comparison, we obtained the highest PCE of 6.87% in fullerene OSCs based on the DRBDT-TVT donor. The significantly higher PCE in this work may be attributed to more ideal film morphology brought by the SVA treatment.…”

Section: ■ Results and Discussionmentioning

confidence: 77%

“…The calculated J SC obtained by integration of the EQE curves is listed in Table , which is in good agreement with the J SC value measured from the J–V curves (the error is <5%). During the preparation of this paper, we have been made aware that Li’s group has recently fabricated fullerene OSCs consisting of DRBDT-TVT and has obtained the highest PCE up to 5.71% . In comparison, we obtained the highest PCE of 6.87% in fullerene OSCs based on the DRBDT-TVT donor.…”

Section: Resultsmentioning

confidence: 93%

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Medium-Bandgap Small-Molecule Donors Compatible with Both Fullerene and Nonfullerene Acceptors

Huo

Yan

Kan

et al. 2018

ACS Appl. Mater. Interfaces

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Much effort has been devoted to the development of new donor materials for small-molecule organic solar cells due to their inherent advantages of well-defined molecular weight, easy purification, and good reproducibility in photovoltaic performance. Herein, we report two small-molecule donors that are compatible with both fullerene and nonfullerene acceptors. Both molecules consist of an (E)-1,2-di(thiophen-2-yl)ethane-substituted (TVT-substituted) benzo[1,2-b:4,5-b']dithiophene (BDT) as the central unit, and two rhodanine units as the terminal electron-withdrawing groups. The central units are modified with either alkyl side chains (DRBDT-TVT) or alkylthio side chains (DRBDT-STVT). Both molecules exhibit a medium bandgap with complementary absorption and proper energy level offset with typical acceptors like PCBM and IDIC. The optimized devices show a decent power conversion efficiency (PCE) of 6.87% for small-molecule organic solar cells and 6.63% for nonfullerene all small-molecule organic solar cells. Our results reveal that rationally designed medium-bandgap small-molecule donors can be applied in high-performance small-molecule organic solar cells with different types of acceptors.

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Section: ■ Results and Discussionmentioning

confidence: 77%

Section: Resultsmentioning

confidence: 93%

Medium-Bandgap Small-Molecule Donors Compatible with Both Fullerene and Nonfullerene Acceptors

Huo

Yan

Kan

et al. 2018

ACS Appl. Mater. Interfaces

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“…The location of BODIPY in the P3HT:PCBM matrix can be estimated in terms of the wetting coefficient (ω) using surface energy and Neumann's and Young's equations [69][70][71]73]. According to the published literature [35,61,69,74], if ω > 1, BODIPY will be located in the P3HT domain. If −1 < ω < 1, BODIPY will be located at the interface of P3HT and PCBM.…”

Section: Morphology Studymentioning

confidence: 99%

Improved Performance of Ternary Solar Cells by Using BODIPY Triads

et al. 2020

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Two boron dipyrromethene (BODIPY) triads, namely BODIPY-1 and BODIPY-2, were synthesized and incorporated with poly-3-hexyl thiophene: (6,6)-phenyl-C61-butyric acid methyl ester (PCBM) P3HT:PCBM. The photovoltaic performance of BODIPY:P3HT:PCBM ternary solar cells was increased, as compared to the control binary solar cells (P3HT:PCBM). The optimized power conversion efficiency (PCE) of BODIPY-1:P3HT:PCBM was improved from 2.22% to 3.43%. The enhancement of PCE was attributed to cascade charge transfer, an improved external quantum efficiency (EQE) with increased short circuit current (Jsc), and more homogeneous morphology in the ternary blend.

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“…This can be secured with the integration into the active layer of a third component [29][30][31][32]. This third element could be a polymer [32][33][34][35], an organic small molecule [36][37][38][39][40][41][42][43][44][45][46][47][48][49], a dye [50][51][52], a fullerene derivative [53], a graphene and a two dimensional (2D)-based material [54][55][56][57][58][59], or a nanocrystal [60]. The introduction and the availability of materials to be leveraged as third element support the better engineering of this architecture towards better photovoltaic OSCs' performances.…”

Section: Introductionmentioning

confidence: 99%

Benzothiadiazole Based Cascade Material to Boost the Performance of Inverted Ternary Organic Solar Cells

et al. 2020

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A conjugated, ladder-type multi-fused ring 4,7-dithienbenzothiadiazole:thiophene derivative, named as compound ‘T’, was for the first time incorporated, within the PTB7:PC71BM photoactive layer for inverted ternary organic solar cells (TOSCs) realization. The effective energy level offset caused by compound T between the polymeric donor and fullerene acceptor materials, as well as its resulting potential as electron cascade material contribute to an enhanced exciton dissociation, electron transfer facilitator and thus improved overall photovoltaic performance. The engineering optimization of the inverted TOSC, ITO/PFN/PTB7:Compound T(5% v/v):PC71BM/MoO3/Al, resulted in an overall power conversion efficiency (PCE) of 8.34%, with a short-circuit current density (Jsc) of 16.75 mA cm−2, open-circuit voltage (Voc) of 0.74 V and a fill factor (FF) of 68.1%, under AM1.5G illumination. This photovoltaic performance was improved by approximately 12% with respect to the control binary device.

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A two-dimension-conjugated small molecule for efficient ternary organic solar cells

Cited by 15 publications

References 57 publications

Medium-Bandgap Small-Molecule Donors Compatible with Both Fullerene and Nonfullerene Acceptors

Medium-Bandgap Small-Molecule Donors Compatible with Both Fullerene and Nonfullerene Acceptors

Improved Performance of Ternary Solar Cells by Using BODIPY Triads

Benzothiadiazole Based Cascade Material to Boost the Performance of Inverted Ternary Organic Solar Cells

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