Boosting photovoltaic performance of ternary organic solar cells by integrating a multi-functional guest acceptor

Yin, Yuli; Zhan, Lingling; Liu, Ming; Yang, Chen; Guo, Fengyun; Liu, Yi; Gao, Shiyong; Zhao, Liancheng; Chen, Hongzheng; Zhang, Yong

doi:10.1016/j.nanoen.2021.106538

Cited by 48 publications

(46 citation statements)

References 62 publications

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“…The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adfm.202200629. system mainly include solvent treatment, [10][11][12] additive treatment, [13][14][15][16] interface engineering, [17][18][19][20] multi-component blend strategy, [21][22][23][24][25] and so on. Among them, the ternary blend strategy is proved to be an achievable means to improve the performance of the PM6:Y6-based system (as shown in Figure 1c).…”

Section: Introductionmentioning

confidence: 99%

Layer‐by‐Layer Processed PM6:Y6‐Based Stable Ternary Polymer Solar Cells with Improved Efficiency over 18% by Incorporating an Asymmetric Thieno[3,2‐b]indole‐Based Acceptor

Chen

Cao

Liu

et al. 2022

Adv Funct Materials

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Although much research on device engineering have brought about significant improvements in PM6:Y6-based polymer solar cell (PSCs) performance, there is still a lack of relevant research to solve the problems caused by the over-aggregation of Y6 and the long-term stability of the device morphology. Herein, a newly designed and synthesized low-bandgap asymmetric small molecule acceptor TIT-2Cl based on thieno[3,2-b]indole core is elaborately introduced into PM6:Y6-based PSCs to suppress the over-aggregation of Y6 molecules with significantly increased efficiency from 15.78% to 17.00%. Moreover, the addition of TIT-2Cl contributes to improved light harvesting, the lowest unoccupied molecular orbital level of Y6:TIT-2Cl, charge separation, transport, and extraction. Simultaneously, the PSCs are further prepared by using the progressive spin-coating method of layer-by-layer (LBL). Due to the formation of vertical phase distribution and the improvement of carrier transport performance, the champion efficiency of LBL-type ternary PSCs reaches 18.18%, which is the highest efficiency reported for PM6:Y6-based PSCs, along with superior stability and compositional insensitivity. Therefore, the results show that the combination of ternary strategy by incorporating appropriate asymmetric molecules and the LBL method is an effective means to fabricate highly efficient stable PSCs.

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Section: Introductionmentioning

confidence: 99%

Layer‐by‐Layer Processed PM6:Y6‐Based Stable Ternary Polymer Solar Cells with Improved Efficiency over 18% by Incorporating an Asymmetric Thieno[3,2‐b]indole‐Based Acceptor

Chen

Cao

Liu

et al. 2022

Adv Funct Materials

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“…To promote our understandings the boost of photovoltaic efficiency in the quaternary device, we explored the phase morphology of these blend films by GIWAXS that allowed us to attain information on the molecular packing and orientation. [ 14 ] The GIWAXS‐related parameters are summarized in Table S3 (Supporting Information). The three BHJ films show obvious intermolecular π–π stackings with the scattering peaks all appearing at q ≈1.71 Å −1 (010) in the out‐of‐plane (OOP) direction.…”

Section: Resultsmentioning

confidence: 99%

Quaternary Organic Solar Cells Enable Suppressed Energy Loss

Kang

Zheng

et al. 2022

Solar RRL

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Multi‐component organic solar cells (OSCs) composing of more than two donor and acceptor materials have attracted increasing attention, due to the possibilities to further mitigate voltage loss (ΔVoc) for the gain of open‐circuit voltage (Voc). However, the control of phase morphology in multi‐component blend systems that critically impacts ΔVoc and the ultimate power conversion efficiency (PCE) is still a challenge. Here, we report a quaternary blend‐based strategy for non‐fullerene OSCs by using two polymer donors (PM6 and L20) along with acceptors of a non‐fullerene (Y6) and PC71BM, leading to concurrent improvements of the Voc, device fill factor and eventual PCE. The quaternary OSC exhibits the advantages of a higher charge collection efficiency, expedited charge carrier sweep‐out, and reduced charge recombination losses. The suppression on ΔVoc is attributed to the reduced radiative recombination loss below the bandgap (0.143 V) and non‐radiative voltage loss (0.216 V). These properties are linked to synergies of modified energetics and film morphology of the quaternary blends. This work demonstrates that incorporating suitable donor and acceptor guest molecules to organic binary blend systems is a highly viable approach for lowering the energy loss in organic bulk heterojunctions towards the boost of photovoltaic performance for realistic energy conversion applications.

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“…[7][8][9][10][11][12][13][14][15][16][17][18] The improvements of photovoltaic performance cannot be separated from explorations into novel polymer donors and nonfullerene acceptors (NFAs). [19][20][21][22][23][24][25][26][27][28][29] Zhan and co-workers reported ITIC NFA with an A-D-A conformation, solving the drawbacks of weak light absorption and relatively fixed energy levels of fullerene and its derivatives. [30][31][32][33] Subsequently, considering distinct advantages in terms of light absorption and variable bandgaps and energy levels, a variety of new NFA acceptors have been explored.…”

Section: Introductionmentioning

confidence: 99%

Recent Progress of Benzodifuran‐Based Polymer Donors for High‐Performance Organic Photovoltaics

Zhang

et al. 2022

Small Science

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At present, a variety of benzo[1,2‐b:4,5‐b′]dithiophene (BDT)‐based polymer donors are designed and synthesized, which have made great progress toward achieving high power conversion efficiencies (PCEs) of polymer solar cells (PSCs). Despite many advantages of benzo[1,2‐b:4,5‐b′]difuran (BDF) compared with BDT unit, the overall performance of BDF polymer‐based PSCs lags far behind that of the counterpart BDT‐based polymers. Recently, great advances have been achieved in BDF polymer‐based PSCs with the highest PCEs over 16%, suggesting that BDF‐based polymers have the significant potential to catch up or even surpass the performance of BDT‐based polymers. In this review, the recent advances of BDF polymers in PSCs are first summarized and then the design strategies and the chemical structure–performance relationships of BDF polymers are discussed. Finally, perspectives on the future development of BDF polymers for high‐efficiency PSCs are provided.

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Boosting photovoltaic performance of ternary organic solar cells by integrating a multi-functional guest acceptor

Cited by 48 publications

References 62 publications

Layer‐by‐Layer Processed PM6:Y6‐Based Stable Ternary Polymer Solar Cells with Improved Efficiency over 18% by Incorporating an Asymmetric Thieno[3,2‐b]indole‐Based Acceptor

Layer‐by‐Layer Processed PM6:Y6‐Based Stable Ternary Polymer Solar Cells with Improved Efficiency over 18% by Incorporating an Asymmetric Thieno[3,2‐b]indole‐Based Acceptor

Quaternary Organic Solar Cells Enable Suppressed Energy Loss

Recent Progress of Benzodifuran‐Based Polymer Donors for High‐Performance Organic Photovoltaics

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