High Performance All‐Polymer Solar Cell via Polymer Side‐Chain Engineering

Zhou, Yan; Kurosawa, Takao; Ma, Wei; Guo, Yangyang; Fang, Lei; Vandewal, Koen; Diao, Ying; Wang, Chenggong; Yan, Qiliang; Reinspach, Julia; Mei, Jianguo; Appleton, Anthony L.; Koleilat, Ghada I.; Gao, Yongli; Mannsfeld, Stefan C. B.; Salleo, Alberto; Ade, Harald; Zhao, Dahui; Bao, Zhenan

doi:10.1002/adma.201306242

Cited by 325 publications

(289 citation statements)

References 42 publications

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“…[14][15][16][17][18][19][20][21][22][23][24][25][26][27] Having a greater selection of donor:acceptor pairs can improve our basic understanding of how features in chemical structure affect each device characteristic, and in particular the formation of the BHJ morphology. Representative nonfullerene acceptors include naphthalene 18 and perylene 19 diimides, oligothiophenes, diketopyrrolopyrroles, vinazenes, rhodamines, and substituted pentacenes.…”

Section: Introductionmentioning

confidence: 99%

“…These strategies are generating increased success, as power conversion efficiencies (PCE) over 7% have now been achieved in polymer:molecule and all-polymer BHJ OPVs. [20][21][22][23][24][25][26][28][29] It is well demonstrated that slight modifications in the chemical structure of organic electronic materials can lead to major changes in pristine and blend film morphologies and their subsequent performance. Of particular relevance to this study is previous work by Shu and co-workers, who surveyed a variety of electron-deficient pentacenes as acceptors in BHJ devices with poly(3-hexylthiophene) [P3HT] acting as the donor material.…”

Section: Introductionmentioning

confidence: 99%

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Dynamics, Miscibility, and Morphology in Polymer:Molecule Blends: The Impact of Chemical Functionality

Risko

Anthony

et al. 2015

Chem. Mater.

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Abstract.In the quest to improve the performance of organic bulk-heterojunction solar cells, many recent efforts have focused on developing molecular and polymer alternatives to commonly used fullerene acceptors. Here, molecular dynamics simulations are used to investigate polymer:molecule blends comprised of the polymer donor poly(3-hexylthiophene) (P3HT) with a series of acceptors based on trialkylsilylethynyl-substituted pentacene. A matrix of nine pentacene derivatives, consisting of systematic chemical variation both in the nature of the alkyl groups and electron-withdrawing moieties appended to the acene, is used to draw connections between the chemical structure of the acene acceptor and the nanoscale properties of the polymer:molecule blend, which include: polymer and molecular diffusivity, donor-acceptor packing and interfacial (contact) area, and miscibility. The results point to the very significant role that seemingly modest changes in chemical structure play during the formation of polymer:molecule blend morphologies.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamics, Miscibility, and Morphology in Polymer:Molecule Blends: The Impact of Chemical Functionality

Risko

Anthony

et al. 2015

Chem. Mater.

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“…However, fullerene derivatives have several drawbacks such as limited spectral absorption, relatively low lowest unoccupied molecular orbital (LUMO) energy level, restricted optoelectronic tunability, poor morphology stability, and high costs due to low synthetic yields and tedious purification, especially for the higher performing C70 derivatives. For these reasons, small molecular9, 10, 11, 12, 13, 14, 15 and polymeric16, 17, 18, 19, 20 nonfullerene acceptors with wider and stronger spectral absorptions, wider tunable energy levels and structural features, have been actively explored as fullerene replacements for OSCs.…”

mentioning

confidence: 99%

Novel Dimethylmethylene‐Bridged Triphenylamine‐PDI Acceptor for Bulk‐Heterojunction Organic Solar Cells

Xiong

Zheng

et al. 2017

Advanced Science

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A novel, star‐shaped electron acceptor, DMTPA‐PDI3, derived from a planar dimethylmethylene‐bridged triphenylamine core with three acetylene‐linked perylene diimide (PDI) units is developed as a nonfullerene acceptor for organic solar cells (OSCs). DMTPA‐PDI3 manifests significantly reduced intramolecular twisting, enabling sufficient system‐wide π‐electron delocalization leading to broadened spectral absorption and raised lowest unoccupied molecular orbital level. As a result, higher and more balanced hole and electron transport properties are observed. Active layers for OSCs comprising DMTPA‐PDI3 acceptor and PBT7‐Th donor exhibit suppressed intermolecular aggregation, giving rise to uniform nanophase network formation. These OSC devices have afforded respectably high power‐conversion efficiency of about 5%.

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“…[15][16][17][18][19][20][21] However, the PCEs of the record all-PSCs are still behind those of the state-of-the-art PC 71 BM-based PSCs. [22][23][24][25][26] Among the high-performance all-PSCs to date, a relatively high short-circuit current density (J sc ) of 18.6 mA cm −2 , [27] or a high fill factor (FF) over 0.7 are achieved individually, [24,26,28] approaching to those of the record-efficiency PC 71 BM-based PSCs.…”

mentioning

confidence: 99%

8.0% Efficient All‐Polymer Solar Cells with High Photovoltage of 1.1 V and Internal Quantum Efficiency near Unity

Zhang

et al. 2017

Advanced Energy Materials

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In very recent years, growing efforts have been devoted to the development of all‐polymer solar cells (all‐PSCs). One of the advantages of all‐PSCs over the fullerene‐based PSCs is the versatile design of both donor and acceptor polymers which allows the optimization of energy levels to maximize the open‐circuit voltage (Voc). However, there is no successful example of all‐PSCs with both high Voc over 1 V and high power conversion efficiency (PCE) up to 8% reported so far. In this work, a combination of a donor polymer poly[4,8‐bis(5‐(2‐octylthio)thiophen‐2‐yl)benzo[1,2‐b:4,5‐b′]dithiophene‐2,6‐diyl‐alt‐(5‐(2‐ethylhexyl)‐4H‐thieno[3,4‐c]pyrrole‐4,6(5H)‐dione)‐1,3‐diyl] (PBDTS‐TPD) with a low‐lying highest occupied molecular orbital level and an acceptor polymer poly[[N,N′‐bis(2‐octyldodecyl)‐naphthalene‐1,4,5,8‐bis(dicarboximide)‐2,6‐diyl]‐alt‐thiophene‐2,5‐diyl] (PNDI‐T) with a high‐lying lowest unoccupied molecular orbital level is used, realizing high‐performance all‐PSCs with simultaneously high Voc of 1.1 V and high PCE of 8.0%, and surpassing the performance of the corresponding PC71BM‐based PSCs. The PBDTS‐TPD:PNDI‐T all‐PSCs achieve a maximum internal quantum efficiency of 95% at 450 nm, which reveals that almost all the absorbed photons can be converted into free charges and collected by electrodes. This work demonstrates the advantages of all‐PSCs by incorporating proper donor and acceptor polymers to boost both Voc and PCEs.

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High Performance All‐Polymer Solar Cell via Polymer Side‐Chain Engineering

Cited by 325 publications

References 42 publications

Dynamics, Miscibility, and Morphology in Polymer:Molecule Blends: The Impact of Chemical Functionality

Dynamics, Miscibility, and Morphology in Polymer:Molecule Blends: The Impact of Chemical Functionality

Novel Dimethylmethylene‐Bridged Triphenylamine‐PDI Acceptor for Bulk‐Heterojunction Organic Solar Cells

8.0% Efficient All‐Polymer Solar Cells with High Photovoltage of 1.1 V and Internal Quantum Efficiency near Unity

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