Over 18% ternary polymer solar cells enabled by a terpolymer as the third component

Peng, Wenhong; Lin, Yuanbao; Jeong, Sang Young; Genene, Zewdneh; Magomedov, Artiom; Woo, Han Young; Chen, Cailing; Wahyudi, Wandi; Tang, Qiang; Deng, Jiyong; Han, Yu; Getautis, Vytautas; Zhu, Weiguo; Anthopoulos, Thomas D.; Wang, Ergang

doi:10.1016/j.nanoen.2021.106681

Cited by 101 publications

(71 citation statements)

References 53 publications

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“…Organic photovoltaics (OPVs) have made significant progress in recent years, as a result of rapid evolution in photoactive materials and device architecture design. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] Currently, the best power conversion efficiency (PCE) of OPVs has reached around 20%, as has been certified by a variety of third-part authorities. [21] Nevertheless, the OPV efficiency is still inferior compared to inorganic counterparts, due to their large energy loss coming largely from the weak van der Waals intermolecular interactions of organic semiconductors, which renders high exciton binding energy.…”

Section: Introductionmentioning

confidence: 99%

High‐Efficiency ITO‐Free Organic Photovoltaics with Superior Flexibility and Upscalability

et al. 2022

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Developing indium‐tin‐oxide (ITO)‐free flexible organic photovoltaics (OPVs) with upscaling capacity is of great significance for practical applications of OPVs. Unfortunately, the efficiencies of the corresponding devices lag far behind those of ITO‐based rigid small‐area counterparts. To address this issue, an advanced device configuration is designed and fabricated featuring a top‐illuminated structure with ultrathin Ag as the transparent electrode. First, a conjugated polyelectrolyte layer, i.e., PCP‐Li, is inserted to effectively connect the bottom Ag anode and the hole transport layer, achieving good photon to electron conversion. Second, charge collecting grids are deposited to suppress the increased resistance loss with the upscaling of the device area, realizing almost full retention of device efficiency from 0.06 to 1 cm2. Third, the designed device delivers the best efficiency of 15.56% with the area of 1 cm2 on polyimide substrate, representing as the record among the ITO‐free, large‐area, flexible OPVs. Interestingly, the device exhibits no degradation after 100 000 bending cycles with a radius of 4 mm, which is the best result for flexible OPVs. This work provides insight into device structure design and optimization for OPVs with high efficiency, low cost, superior flexibility, and upscaling capacity, indicating the potential for the future commercialization of OPVs.

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Section: Introductionmentioning

confidence: 99%

High‐Efficiency ITO‐Free Organic Photovoltaics with Superior Flexibility and Upscalability

et al. 2022

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“…Organic semiconductor-based solar cells have gained considerable popularity over the last few years, and some scientists believe they have the potential to completely replace silicon-based solar cells in the near future [ 1 , 2 , 3 , 4 , 5 ]. Organic semiconductors offer many advantages for solar cell applications such as lightweight, low cost, fabrication on various substrates, wide-area applications, and flexible and tunable processing at room temperature [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Design of an Efficient PTB7:PC70BM-Based Polymer Solar Cell for 8% Efficiency

Alahmadi

2022

Polymers

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Polymer semiconductors may have the potential to fully replace silicon in next-generation solar cells because of their advantages such as cheap cost, lightweight, flexibility, and the ability to be processed for very large area applications. Despite these advantages, polymer solar cells are still facing a certain lack of power-conversion efficiency (PCE), which is essentially required for commercialization. Recently, bulk heterojunction of PTB7:PC70BM as an active layer showed remarkable performance for polymer solar cells in terms of PCE. Thus, in this paper, we developed and optimized a novel design using PEDOT:PSS and PFN-Br as electron and hole transport layers (ETL and HTL) for ITO/PEDOT:PSS/PT7B:PC70BM/PFN-Br/Ag as a polymer solar cell, with the help of simulation. The optimized solar cell has a short-circuit current (Isc) of 16.434 mA.cm−2, an open-circuit voltage (Voc) of 0.731 volts, and a fill-factor of 68.055%, resulting in a maximum PCE of slightly above 8%. The findings of this work may contribute to the advancement of efficient bulk-heterojunction-based polymer solar cells.

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“…With the synthesis of new materials and the exploration of new structures, all-polymer solar cells (all-PSCs) consisting of p-type polymer donors and n-type polymer acceptors have attracted increased attention due to some of their distinctive features, such as enhanced electronic structure tunability, outstanding mechanical durability and stability, and excellent film-formation capability suitable for roll-to-roll manufacturing [ 9 , 10 , 11 ]. Notably, polymerizing small--molecule acceptors (SMAs) to construct polymer acceptors (PSMAs) has boosted the PCEs of the all-PSCs to over 15% recently [ 12 , 13 , 14 , 15 , 16 , 17 ], yet this still lags behind the state-of-the-art efficiencies from non-fullerene OSCs [ 18 ]. This is mainly due to the difficulty in morphology regulation of bulk-heterojunction (BHJ) blend films in all-PSC active layers [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Efficient All-Polymer Solar Cells with Sequentially Processed Active Layers

et al. 2022

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In this work, we apply the sequential processing (SqP) method to address the relatively low electron mobility in recent all-polymer solar cells (all-PSCs) based on the polymerized small-molecule acceptor (PSMA). Compared to the blend-casting (BC) method, all-PSCs composed of PM6/PY-IT via the SqP method show boosted electron mobility and a more balanced charge carrier transport, which increases the FF of the SqP device and compensates for the short-circuit current loss, rendering comparable overall performance with the BC device. Through film-depth-dependent light absorption spectroscopy, we analyze the sub-layer absorption and exciton generation rate in the vertical direction of the device, and discuss the effect of the increased electron mobility on device performance, accordingly.

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Over 18% ternary polymer solar cells enabled by a terpolymer as the third component

Cited by 101 publications

References 53 publications

High‐Efficiency ITO‐Free Organic Photovoltaics with Superior Flexibility and Upscalability

High‐Efficiency ITO‐Free Organic Photovoltaics with Superior Flexibility and Upscalability

Design of an Efficient PTB7:PC70BM-Based Polymer Solar Cell for 8% Efficiency

Efficient All-Polymer Solar Cells with Sequentially Processed Active Layers

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