Restricting the liquid–liquid phase separation of PTB7-Th:PF12TBT:PC<sub>71</sub>BM by enhanced PTB7-Th solution aggregation to optimize the interpenetrating network

Tang, Bin; Liu, Jiangang; Cao, Xingzhong; Zhao, Qingjun; Yu, Xinge; Zheng, Shijun; Han, Yanchun

doi:10.1039/c6ra28306c

Cited by 26 publications

(19 citation statements)

References 51 publications

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“…This finding is consistent with the improved hole mobility in the ternary blend film, suggesting that PTB7-Th chains diluted in other materials exhibit improved hole transport properties. [42,43] Such an improvement in ordering of polymer chains has been reported for a crystalline polymer P3HT blended with polystyrene. [39][40][41] In these diluted blends, the charge transport was improved or comparable to that in neat films.…”

Section: Resultssupporting

confidence: 54%

Enhanced Hole Transport in Ternary Blend Polymer Solar Cells

et al. 2019

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Recently, ternary blend polymer solar cells have attracted great attention to improve a short-circuit current density (J SC ) effectively, because complementary absorption bands can harvest the solar light over a wide wavelength range from visible to near-IR region. Interestingly, some ternary blend solar cells have shown improvements not only in J SC but also in fill factor (FF). Previously, we also reported that a ternary blend solar cell based on a low-bandgap polymer (PTB7-Th), a widebandgap polymer (PDCBT), and a fullerene derivative (PCBM) exhibited a higher FF than their binary analogues. Herein, we study charge transport in PTB7-Th/PDCBT/PCBM ternary blend films to address the origin of the improvement in FF. We found that hole polarons are located in PTB7-Th domains and their mobility is enhanced in the ternary blend film.

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Section: Resultssupporting

confidence: 54%

Enhanced Hole Transport in Ternary Blend Polymer Solar Cells

et al. 2019

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“…electron-accepting material to demonstrate a PCE as high as 10%. [15][16][17][18][19][20][21][22][23][24][25][26][27][28] Two intrinsically compatible fullerene derivatives form a well-mixed alloy with anticipation of superior acceptor performance. A ternary blend of polymer with two such fullerene derivatives in a D:A:A configuration has demonstrated superior device performance courtesy of balanced charge mobility and optimized morphology of photoactivity leading to improved device performance as compared with the fullerene-based binary device.…”

Section: Context and Scalementioning

confidence: 99%

Miscibility-Driven Optimization of Nanostructures in Ternary Organic Solar Cells Using Non-fullerene Acceptors

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2018

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136

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Non-fullerene acceptors (NFAs) with vibrant superiority over fullerene derivatives have proved advantageous as a guest component in a ternary blend signifying improved photon harvesting. However, heterogeneity of NFA-based ternary blend morphology is very complex, and the optimization requires simultaneous considerations of molecular miscibility and electronic properties. We discuss the role of guest NFA for an eased optimization of ternary blend photoactive layer in four different ways. Our four-model prospect of component selection is driven by the well-matched intrinsic miscibility, electronic, and optical characteristics of organic materials. We analyze each model, modulating photoactive layer morphology toward efficient transfer, transport, and collection of charges along with their balanced dissociation and drifting. We believe a model-based selection of NFA and its organization as a guest in a complex ternary blend will serve as a guide for researchers to optimize thin film nanostructures, a route toward efficient larger-area ternary devices.

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“…Previous reports have verified that surface energy play an important role in the segregation tendency of each material employed in blends, 44,45 and the surface energy of each component can be estimated from the contact angle. We measure the contact angle of J71, ITIC and N2200 using water and ethylene glycol in Figure S3, and the information of the liquid contact angle and surface energies are summarized in Table S3.…”

Section: Resultsmentioning

confidence: 89%

Understanding the effect of N2200 on performance of J71: ITIC bulk heterojunction in ternary non-fullerene solar cells

Guo

Zhang

et al. 2019

Organic Electronics

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None-fullerene solar cells with ternary architecture have attracted much attention because it is an effective approach for boosting the device power conversion efficiency.Here, the crystalline polymer N2200 as the third component is integrated into J71:ITIC bulk heterojunction. A series of characterizations indicate that N2200 could increase photo-harvesting, balanced hole and electron mobilities, enhanced exciton dissociation, and suppressed charge recombination, which result in the comprehensive improvement of open circuit voltage, short circuit current and fill factor in the device. Moreover, after introduction of N2200, the morphology of the ternary active layer is optimized, and the film crystallinity is improved. This work demonstrates that adding a small quantity of high crystallization acceptor into non-fullerene donor: acceptor mixture is a promising strategy toward developing high-performance organic solar cells.

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Restricting the liquid–liquid phase separation of PTB7-Th:PF12TBT:PC₇₁BM by enhanced PTB7-Th solution aggregation to optimize the interpenetrating network

Abstract: The current understanding of the active layer morphology in ternary organic solar cells (OSCs) is superficial owing to more variables and complexity compared to that of binary OSCs.

Cited by 26 publications

References 51 publications

Enhanced Hole Transport in Ternary Blend Polymer Solar Cells

Enhanced Hole Transport in Ternary Blend Polymer Solar Cells

Miscibility-Driven Optimization of Nanostructures in Ternary Organic Solar Cells Using Non-fullerene Acceptors

Understanding the effect of N2200 on performance of J71: ITIC bulk heterojunction in ternary non-fullerene solar cells

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Restricting the liquid–liquid phase separation of PTB7-Th:PF12TBT:PC71BM by enhanced PTB7-Th solution aggregation to optimize the interpenetrating network

Abstract: The current understanding of the active layer morphology in ternary organic solar cells (OSCs) is superficial owing to more variables and complexity compared to that of binary OSCs.

Cited by 26 publications

References 51 publications

Enhanced Hole Transport in Ternary Blend Polymer Solar Cells

Enhanced Hole Transport in Ternary Blend Polymer Solar Cells

Miscibility-Driven Optimization of Nanostructures in Ternary Organic Solar Cells Using Non-fullerene Acceptors

Understanding the effect of N2200 on performance of J71: ITIC bulk heterojunction in ternary non-fullerene solar cells

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Product

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Restricting the liquid–liquid phase separation of PTB7-Th:PF12TBT:PC₇₁BM by enhanced PTB7-Th solution aggregation to optimize the interpenetrating network