Ternary Organic Solar Cells Based on Two Highly Efficient Polymer Donors with Enhanced Power Conversion Efficiency

Liu, Tao; Huo, Lijun; Sun, Xiaobo; Fan, Bingbing; Cai, Yunhao; Kim, Taehyo; Kim, Jin Young; Choi, Hyosung; Sun, Yanming

doi:10.1002/aenm.201502109

Cited by 153 publications

(124 citation statements)

References 43 publications

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“…18,19 Despite plenty of high-performance polymer donors having been reported, only a limited number of them are narrow bandgap (NBG, < 1.50 eV) polymers. 21,[24][25][26] However, most reported high-performance NBG polymers usually need complex morphology engineering and interfacial modifications during device fabrications, which may limit their further applications. 21,[24][25][26] However, most reported high-performance NBG polymers usually need complex morphology engineering and interfacial modifications during device fabrications, which may limit their further applications.…”

Section: Introductionmentioning

confidence: 99%

A fluorine-induced high-performance narrow bandgap polymer based on thiadiazolo[3,4-c]pyridine for photovoltaic applications

et al. 2016

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†Electronic Supplementary Information (ESI) available: [TGA plots, temperaturedependent absorption spectra of PDTPT-2TF, HOMO and LUMO distributions, hole mobility measurements, photovoltaic performance of PDTPT-2T with additive, TEM images, 1 H NMR and 13 C NMR spectra]. See Thiadiazolo[3,pyridine (PT) has great potential in constructing high-performance narrow bandgap (NBG) photovoltaic polymers. But to date the best power conversion efficiencies (PCEs) for PT-containing polymers are only around 6%. Herein we report two PT-containing NBG polymers PDTPT-2T and PDTPT-2TF based on 2,2'-bithiophene (2T) and 3,3'-difluoro-2,2'-bithiophene (2TF), respectively. The effects of fluorine substituent on optoelectronic properties are thoroughly investigated. The film absorption onset of PDTPT-2TF is 855 nm, bathochromic-shifted by 24 nm in comparison with that (831 nm) of PDTPT-2T. The lowest unoccupied molecular orbital (LUMO) and highest occupied molecular orbital (HOMO) energy levels of PDTPT-2TF are down-shifted by 0.15 and 0.11 eV relative to those of PDTPT-2T, respectively. X-ray diffraction (XRD) patterns indicate that more ordered structure is formed in the solid film of PDTPT-2TF. Furthermore, the miscibility between polymer and [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) is significantly improved through the introduction of fluorine. Consequently, PDTPT-2TF exhibits a high PCE of 8.01% while PDTPT-2T only shows a maximum PCE of 2.65%. The efficiency of 8.01% is the highest one for PT-containing polymers, and more importantly, it is achieved without any processing additives or post-treatments. This work indicates that PT would have great potential as building block to construct high-performance photovoltaic polymers.

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Section: Introductionmentioning

confidence: 99%

A fluorine-induced high-performance narrow bandgap polymer based on thiadiazolo[3,4-c]pyridine for photovoltaic applications

et al. 2016

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“…Recently, including an additional conjugated polymer donor (or fullerene acceptor) in the binary blends to create ternary OPVs1 has been advanced as a facile way to broaden the light absorption band, improve the nanomorphology, increase the open-circuit voltage ( V OC ), and boost the charge (or energy) transfer of the OPVs234567. In particular, ternary OPVs based on the efficient non-crystalline polymer host (for example, poly[[4,8-bis[(2-ethylhexyl)oxy]benzo[1,2- b :4,5-b′]dithiophene-2,6-diyl][3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4- b ]thiophenediyl]], PTB7) were shown to exhibit a power conversion efficiency (PCE) of about 10%67, which would meet commercialization requirements.…”

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confidence: 99%

Long-term efficient organic photovoltaics based on quaternary bulk heterojunctions

et al. 2017

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A major impediment to the commercialization of organic photovoltaics (OPVs) is attaining long-term morphological stability of the bulk heterojunction (BHJ) layer. To secure the stability while pursuing optimized performance, multi-component BHJ-based OPVs have been strategically explored. Here we demonstrate the use of quaternary BHJs (q-BHJs) composed of two conjugated polymer donors and two fullerene acceptors as a novel platform to produce high-efficiency and long-term durable OPVs. A q-BHJ OPV (q-OPV) with an experimentally optimized composition exhibits an enhanced efficiency and extended operational lifetime than does the binary reference OPV. The q-OPV would retain more than 72% of its initial efficiency (for example, 8.42–6.06%) after a 1-year operation at an elevated temperature of 65 °C. This is superior to those of the state-of-the-art BHJ-based OPVs. We attribute the enhanced stability to the significant suppression of domain growth and phase separation between the components via kinetic trapping effect.

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“…Bo's group [39] developed a ternary blend system that contained two conjugated polymers HD-PDFC-DTBT (simply abbreviated as HD) and DT-PDPPTPT (simply abbreviated as DPP) with complementary absorption feature to expand the absorption profile of the active layer. More importantly, [42] demonstrated a high-performance ternary solar cell by using a well-established wide-bandgap polymer, PDBT-T1, as the additional donor, which shows complementary spectra with PTB7-Th. In addition, the polymer crystallinity in the blend can be improved through incorporation of the high-crystalline PDBT-T1 donor.…”

Section: Two Donors and One Acceptor (D 1 -D 2 -A) Systemmentioning

confidence: 99%

Perspective of a new trend in organic photovoltaic: ternary blend polymer solar cells

2016

Sci. China Mater.

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In the past few years, ternary polymer solar cells (PSCs) have emerged as a promising structure to simultaneously improve all solar cell parameters compared with traditional binary PSCs. The third component in ternary PSCs can play versatile functions to enhance the device performance. In this review, we summarize the design rules for fabricating high-performance ternary PSCs and introduce the recent progress in this field. In addition, the characterization methods for determining the role of the third component played in ternary PSCs are described.

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Ternary Organic Solar Cells Based on Two Highly Efficient Polymer Donors with Enhanced Power Conversion Efficiency

Cited by 153 publications

References 43 publications

A fluorine-induced high-performance narrow bandgap polymer based on thiadiazolo[3,4-c]pyridine for photovoltaic applications

A fluorine-induced high-performance narrow bandgap polymer based on thiadiazolo[3,4-c]pyridine for photovoltaic applications

Long-term efficient organic photovoltaics based on quaternary bulk heterojunctions

Perspective of a new trend in organic photovoltaic: ternary blend polymer solar cells

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