Conquering the morphology barrier of ternary all-polymer solar cells by designing random terpolymer for constructing efficient binary all-polymer solar cells

Li, Zhenye; Liang, Yingfang; Qian, Xitang; Ying, Lei; Cao, Yong

doi:10.1016/j.cej.2022.135491

Cited by 14 publications

(5 citation statements)

References 52 publications

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“…The CCL was calculated by the Scherrer equation CCL = 2𝜋K/△q, where K is shape factor and △q is half width of diffraction peak. [50] For PTzBI:N2200 (0% DIO) blend film, a (100) diffraction peak can be observed at 0.29 Å −1 in IP, with a CCL of 5.24 nm. Moreover, a (010) 𝜋-𝜋 stacking peak can be seen at 1.76 Å −1 in OOP, with a 𝜋-𝜋 stacking distance of 3.57 Å (Figure 5c).…”

Section: Film Morphologymentioning

confidence: 98%

Morphology Evolution via a Generic Solvent Additive Concept Enables Large‐Area All‐Polymer Solar Cells with Negligible PCE Loss

Qian

Wang

et al. 2022

Macro Materials & Eng

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Small-area all-polymer solar cells (all-PSCs) have obtained excellent power conversion efficiency (PCE) through smart design of materials and advanced device fabrication. Nevertheless, commercialization of all-PSCs requires the urgent development of large-area all-PSCs processing techniques compatible with roll-to-roll processing. Generally, the PCE of all-PSCs drops sharply with the increased device area, which is the biggest obstacle for fabrication of large-area all-PSCs toward commercialization. Morphology modulation of bulk heterojunction (BHJ) film may be an effective strategy for fabrication of large-area all-PSCs. In this work, a solvent additive 1,8-diiodooctane (DIO) is introduced to regulate the charge transport, molecular orientation, and BHJ film morphology of all-PSCs. As the device area of all-PSCs expands from 0.04 to 0.5 cm 2 , the PCE of the device without DIO reduces by 14.8%, while that of the device with DIO only reduces by 3.3%. To the best of the authors' knowledge, this is the lowest PCE attenuation value achieved for 0.5-1 cm 2 all-PSCs. The DIO solvent additive is also applicable to other efficient all-PSCs, which proves the advance of generic solvent additive concept for constructing high-performance large-area all-PSCs, and may push forward the commercialization process of all-PSCs.

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Section: Film Morphologymentioning

confidence: 98%

Morphology Evolution via a Generic Solvent Additive Concept Enables Large‐Area All‐Polymer Solar Cells with Negligible PCE Loss

Qian

Wang

et al. 2022

Macro Materials & Eng

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“…Most recently, Li and co‐workers designed a random copolymer, namely, P1‐co‐25%P2, to solve the morphology barrier in ternary all‐PSCs. [ 56 ] Benefiting from the optimized π – π stacking, miscibility, and phase separation, improved exciton diffusion and charge transport could be realized. In comparison with the ternary blends, the all‐PSCs based on the random terpolymer delivered the highest efficiency of 14.67%.…”

Section: Random Copolymerized Donor Materialsmentioning

confidence: 99%

Recent Research Progress in Random Copolymerization of Polymer Photovoltaic Materials for High‐Performance Polymer Solar Cells

et al. 2023

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Along with the development of narrow‐bandgap A–D–A and A–DA’D–A‐type small‐molecule acceptors (SMAs), polymer solar cells (PSCs) have witnessed a striking progress, with an impressing power conversion efficiency (PCE) approaching 20% recently. Aiming to realize the future commercial application of organic photovoltaic (OPV) technology, developing more efficient organic conjugated materials is urgently needed. Benefiting from the specific advantages in precisely adjusting the optoelectronic materials, random copolymerization strategy has drawn great attention during the past several years and has played a vital role in the development of PSCs. Herein, the functions of random copolymerization strategy in modulating the polymer properties are briefly discussed. Then the recent research progress of random copolymerization strategy of polymer photovoltaic materials in PSCs is reviewed. Finally, perspectives and a concise outlook on the further advancement of the random copolymerization strategy are put forward.

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“…[6][7][8] Various approaches have been employed to fine-tune the nanoscale morphology of all-PSCs involving utilization of additives, selection of different solvents, technology of thermal ARTICLE scitation.org/journal/ape annealing, adoption of ternary strategy, and application of layer-bylayer structures. [9][10][11][12][13][14][15][16][17][18][19] Among the diverse methods mentioned earlier, ternary strategy stands out because an optimal addition of the third component can broaden the absorption spectrum of the original system, influence the crystalline features of host polymers, regulate the morphology of photoactive blends, and realize rollto-roll production. [20][21][22][23] In the past few decades, numerous efforts have been dedicated to ternary organic solar cells (TOSCs) and a decent device performance with an obviously improved PCE was realized.…”

Section: Introductionmentioning

confidence: 99%

Crystallinity and phase separation induced morphological modulation for efficient ternary all-polymer solar cells

Sha,

Zhu,

Wang

et al. 2023

APL Energy

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All-polymer solar cells (all-PSCs) have attracted enormous attention and achieved significant progress in recent years due to their long-term stability and excellent film stretchability. However, the problem of morphology control in bulk-heterojunction (BHJ) films due to highly entangled polymeric chains hinders the further improvement of device performance. In this work, we obtained fine-tuned photoactive layer morphology through reconstructed microstructure induced by steric effects to realize an improved device performance in ternary all-PSCs. The large tetrahexylphenyl substituents on the backbone of naphthalene diimide–indacenodithienothiophene based copolymer acceptor BL-102 bring forth the steric-hindrance effect and influence intermolecular interactions. Therefore, the copolymer BL-102 delivers the property of suppressed self-aggregation, causing reconstructed crystalline features and morphology in blending films. The ternary devices tended to reduce the excessive phase separation by suppressing the aggregation of original polymers but to promote intermixing behaviors. Therefore, the optimal BHJ film manifested a well-formed bi-continuous interpenetrating nanoscale network with a larger π–π stacking coherence length and ordered face-on molecular orientation. Hence, a faster electron transfer (ET) and hole transfer (HT) process combined with balanced charge carrier mobilities can be achieved to enhance the overall device performance. This work provides an effective method to regulate the photoactive layer morphology of all-PSCs through structurally steric hindrance effects and demonstrate the significance of ternary-blending strategy induced nanoscale morphology modulation for fabricating highly efficient all-PSCs.

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Conquering the morphology barrier of ternary all-polymer solar cells by designing random terpolymer for constructing efficient binary all-polymer solar cells

Cited by 14 publications

References 52 publications

Morphology Evolution via a Generic Solvent Additive Concept Enables Large‐Area All‐Polymer Solar Cells with Negligible PCE Loss

Morphology Evolution via a Generic Solvent Additive Concept Enables Large‐Area All‐Polymer Solar Cells with Negligible PCE Loss

Recent Research Progress in Random Copolymerization of Polymer Photovoltaic Materials for High‐Performance Polymer Solar Cells

Crystallinity and phase separation induced morphological modulation for efficient ternary all-polymer solar cells

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