A New Nonfullerene Electron Acceptor with a Ladder Type Backbone for High‐Performance Organic Solar Cells

Qiu, Nailiang; Zhang, Huijing; Wan, Xiangjian; Li, Chenxi; Ke, Xuezhi; Feng, Huanran; Kan, Bin; Zhang, Hongtao; Zhang, Qiang; Lu, Yan; Chen, Yongsheng

doi:10.1002/adma.201604964

Cited by 294 publications

(177 citation statements)

References 45 publications

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“…After device optimization, a PCE of 5.71% was obtained. The value is nearly comparable to that of DICTF:PBDB-T devices [39]. Similar to the above active layer system, the devices with DCF-2HT had a higher Voc of more than 1 V. The J-V curves of the devices using PBDB-T as the electron donor material before and after optimization and the corresponding EQE spectra are shown in Fig.…”

Section: Photovoltaic Propertiessupporting

confidence: 66%

A-D-A-type small molecular acceptor with one hexyl-substituted thiophene as π bridge for fullerene-free organic solar cells

et al. 2016

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Section: Photovoltaic Propertiessupporting

confidence: 66%

A-D-A-type small molecular acceptor with one hexyl-substituted thiophene as π bridge for fullerene-free organic solar cells

et al. 2016

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“…[42] Compared with that of the nonhalogenated molecule F-H, [43] remarkable efficiencies with high FF were achieved for these three molecules based devices, which could attribute to the auxochromic effect of halogen atoms and high mobilities of those three molecules after halogenation. [42] Compared with that of the nonhalogenated molecule F-H, [43] remarkable efficiencies with high FF were achieved for these three molecules based devices, which could attribute to the auxochromic effect of halogen atoms and high mobilities of those three molecules after halogenation.…”

mentioning

confidence: 99%

High Performance Thick‐Film Nonfullerene Organic Solar Cells with Efficiency over 10% and Active Layer Thickness of 600 nm

Zhang

Feng

Meng

et al. 2019

Advanced Energy Materials

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been reported. And for tandem solar cells, the PCE has reached 17%. [22] However, the vast majority of those device performances were obtained with layer-thicknesses at around 100 nm [23][24][25][26][27][28][29] and decreased drastically with the increase of the active layer thickness, which limits their application in the roll to roll large-scale solution printing technology. [30,31] Furthermore, 20%-40% of the incident photon flux were wasted in such a active layer thickness, [32] which directly limits the short circuit current density (J sc ) of the corresponding OSCs. Thus, it is necessary to develop high efficiency OSCs with tolerance of the active layer thickness. However, a lot of research work have proved that the charge collection efficiency of a device is inversely proportional to the square of the film thickness of the active layer. [33,34] It was reflected in the decline of fill factor (FF) with the increase of film thickness. Also, the J sc will decrease due to the severe bimolecular recombination. [35,36] Thus, it is still a challenge to obtain high efficiency devices with active layer thickness tolerance. To date, in the reported cases with active layer thickness tolerance, most are based on fullerene derivative acceptors and it has been found that the donor materials with high crystallinity and balanced mobility with fullerene derivative acceptors manifested better performance with high film thickness. [35][36][37][38] Compared with fullerene derivatives based OSCs, it is much more challenging to realize thick-film NFAs OSCs with high performance since the electron mobilities of NFAs are usually lower than that of fullerene derivative acceptors. [39,40] Thus, the charge transport and collection process in those NFA based thick films are not efficient. So far, great attentions have been drawn on the NFA based thick film OSCs and much progress have been made. For examples, Yip and co-workers reported devices based on PffBT4T-2OD:EH-IDTBR and realized a PCE of 9.1% with an active layer thickness of 300 nm by optimizing device architectures to overcome the space-charge effects. [41] Zhang and co-workers reported devices based on PM6:IDIC with PCEs of 11.9% under the film thickness of 150 nm and 11.3% under the condition of 255 nm condition. Although the device performance is good enough, the cases with thicker active layers Developing efficient organic solar cells (OSCs) with relatively thick active layer compatible with the roll to roll large area printing process is an inevitable requirement for the commercialization of this field. However, typical laboratory OSCs generally exhibit active layers with optimized thickness around 100 nm and very low thickness tolerance, which cannot be suitable for roll to roll process. In this work, high performance of thick-film organic solar cells employing a nonfullerene acceptor F-2Cl and a polymer donor PM6 is demonstrated. High power conversion efficiencies (PCEs) of 13.80% in the inverted structure device and 12.83% in the conventional structure device are achi...

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“…Designing the narrow bandgap acceptors with NIR absorption matching with mid-bandgap donors could be an ideal case for further improving the PCEs of OSCs. Recently, nonfullerene acceptors (NFAs) [4][5][6][7][8][9][10][11][12] used in OSCs have drawn vigorous attention A new electron-rich central building block, 5,5,12,12-tetrakis(4-hexylphenyl)indacenobis-(dithieno[3,2-b:2′,3′-d]pyrrol) (INP), and two derivative nonfullerene acceptors (INPIC and INPIC-4F) are designed and synthesized.…”

mentioning

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Dithieno[3,2‐b:2′,3′‐d]pyrrol Fused Nonfullerene Acceptors Enabling Over 13% Efficiency for Organic Solar Cells

et al. 2018

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A new electron-rich central building block, 5,5,12,12-tetrakis(4-hexylphenyl)-indacenobis-(dithieno[3,2-b:2',3'-d]pyrrol) (INP), and two derivative nonfullerene acceptors (INPIC and INPIC-4F) are designed and synthesized. The two molecules reveal broad (600-900 nm) and strong absorption due to the satisfactory electron-donating ability of INP. Compared with its counterpart INPIC, fluorinated nonfullerene acceptor INPIC-4F exhibits a stronger near-infrared absorption with a narrower optical bandgap of 1.39 eV, an improved crystallinity with higher electron mobility, and down-shifted highest occupied molecular orbital and lowest unoccupied molecular orbital energy levels. Organic solar cells (OSCs) based on INPIC-4F exhibit a high power conversion efficiency (PCE) of 13.13% and a relatively low energy loss of 0.54 eV, which is among the highest efficiencies reported for binary OSCs in the literature. The results demonstrate the great potential of the new INP as an electron-donating building block for constructing high-performance nonfullerene acceptors for OSCs.

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A New Nonfullerene Electron Acceptor with a Ladder Type Backbone for High‐Performance Organic Solar Cells

Cited by 294 publications

References 45 publications

A-D-A-type small molecular acceptor with one hexyl-substituted thiophene as π bridge for fullerene-free organic solar cells

A-D-A-type small molecular acceptor with one hexyl-substituted thiophene as π bridge for fullerene-free organic solar cells

High Performance Thick‐Film Nonfullerene Organic Solar Cells with Efficiency over 10% and Active Layer Thickness of 600 nm

Dithieno[3,2‐b:2′,3′‐d]pyrrol Fused Nonfullerene Acceptors Enabling Over 13% Efficiency for Organic Solar Cells

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