Achieving 19% Power Conversion Efficiency in Planar‐Mixed Heterojunction Organic Solar Cells Using a Pseudosymmetric Electron Acceptor

Advanced Materials, Год журнала: 2022, Номер 34(32)

Опубликована: Июнь 20, 2022

A record power conversion efficiency (PCE) of over 19% is realized in planar-mixed heterojunction (PMHJ) organic solar cells (OSCs) by adopting the asymmetric selenium substitution strategy making a pseudosymmetric electron acceptor, BS3TSe-4F. The combined molecular asymmetry with more polarizable increases dielectric constant D18/BS3TSe-4F blend, helping lower exciton binding energy. On other hand, dimer packing BS3TSe-4F facilitated to enable free charge generation, efficient dissociation and lowering radiative recombination loss (ΔE2 ) OSCs. As result, PMHJ OSCs based on achieve PCE 18.48%. By incorporating another mid-bandgap acceptor Y6-O into form ternary PMHJ, higher open-circuit voltage (VOC can be achieved realize an impressive 19.03%. findings using acceptors enhancing device provides effective way develop highly materials for

Язык: Английский

---

Ternary Blend Organic Solar Cells: Understanding the Morphology from Recent Progress

Advanced Materials, Год журнала: 2021, Номер 34(46)

Опубликована: Ноя. 19, 2021

Ternary blend organic solar cells (TB-OSCs) incorporating multiple donor and/or acceptor materials into the active layer have emerged as a promising strategy to simultaneously improve overall device parameters for realizing higher performances than binary devices. Whereas introducing also results in more complicated morphology their counterparts. Understanding is crucially important further improving performance of TB-OSC. This review introduces solubility and miscibility that affect ternary blends. Then, this summarizes recent processes study on blends from aspects molecular crystallinity, packing orientation, domain size purity, directly observation morphology, vertical phase separation well morphological stability. Finally, summary prospects TB-OSCs are concluded.

Язык: Английский

---

Manipulating Charge Transfer and Transport via Intermediary Electron Acceptor Channels Enables 19.3% Efficiency Organic Photovoltaics

Advanced Energy Materials, Год журнала: 2022, Номер 12(39)

Опубликована: Авг. 21, 2022

Abstract Balancing and improving the open‐circuit voltage ( V oc ) short‐circuit current density J sc synergistically has always been critical point for organic photovoltaics (OPVs) to achieve high efficiencies. Here, this work adopts a ternary strategy regulate trade‐off between by combining symmetric‐asymmetric non‐fullerene acceptors that differ at terminals alkyl side chains build OPV (TOPV). It is noticed reduced energy disorder enhanced luminescence efficiency of TOPV enable mitigated loss higher . Meanwhile, third component, which distributed host donor–acceptor interface, acts as charge transport channel. The prolonged exciton lifetime, boosted mobility, depressed recombination promote obtain an improved Finally, with , delivers optimal 19.26% (certified 19.12%), representing one highest values reported so far.

Язык: Английский

---

Advantages, challenges and molecular design of different material types used in organic solar cells

Nature Reviews Materials, Год журнала: 2023, Номер 9(1), С. 46 - 62

Опубликована: Дек. 15, 2023

Язык: Английский

---

Wide Bandgap Polymer with Narrow Photon Harvesting in Visible Light Range Enables Efficient Semitransparent Organic Photovoltaics

Advanced Functional Materials, Год журнала: 2021, Номер 31(52)

Опубликована: Сен. 21, 2021

Abstract Wide bandgap polymer D18 with narrow photon harvesting in visible light range and small molecule N3 near‐infrared are adopted for building semitransparent organic photovoltaics (OPVs). To find out the optimal D18:N3 weight ratio OPVs, series of opaque OPVs built a varied ratio. The power conversion efficiency (PCE) fill factor can be maintained over 16% 77% (0.7:1.6, wt/wt) based respectively. average transmittance (AVT) corresponding blend films achieved 50%, demonstrating great potential fabricating efficient OPVs. on fabricated by using 1 nm Au/(10, 15, 20 nm) Ag as cathode. thickness layers is to balance optical properties electrical top electrode. 10 achieve highest utilization 2.90% PCE 12.91% an AVT 22.49%, which should among best performance reported This work demonstrates that wide donor has preparing

Язык: Английский

---

Rational control of sequential morphology evolution and vertical distribution toward 17.18% efficiency all-small-molecule organic solar cells

Joule, Год журнала: 2022, Номер 6(12), С. 2835 - 2848

Опубликована: Ноя. 2, 2022

Язык: Английский

---

Non-fullerene acceptors with hetero-dihalogenated terminals induce significant difference in single crystallography and enable binary organic solar cells with 17.5% efficiency

Energy & Environmental Science, Год журнала: 2021, Номер 15(1), С. 320 - 333

Опубликована: Окт. 6, 2021

A synergistic hetero-dihalogenated terminals strategy was systematically employed for the first time to enhance single-crystal packing, boosting device performance of a Y-BO-FCl:PM6 with remarkable PCE 17.52%.

Язык: Английский

---

Smart Ternary Strategy in Promoting the Performance of Polymer Solar Cells Based on Bulk‐Heterojunction or Layer‐By‐Layer Structure

Small, Год журнала: 2021, Номер 18(4)

Опубликована: Ноя. 28, 2021

Although the rapid development of polymer solar cells (PSCs) has been achieved, it is still a great challenge to explore efficient ways for improving power conversion efficiency (PCE) PSCs from materials and device engineering. Ternary strategy confirmed as an way improve PCE by employing three kinds materials. In this work, one donor PM6, two non-fullerene N3 MF1 are selected prepare ternary with layer-by-layer (LbL) or bulk-heterojunction (BHJ) structure. The LbL BHJ-PSCs exhibit PCEs 16.75% 16.76% 15 wt% content in acceptors, corresponding over 5% 4% improvement compared N3-based binary BHJ mainly attributed fill factor enhancement 73.29% 76.95% LbL-PSCs 74.13% 77.51% strategy. This work indicates that potential preparing highly via simultaneously optimizing molecular arrangement thickness each layer.

Язык: Английский

---

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

Nano Energy, Год журнала: 2021, Номер 92, С. 106681 - 106681

Опубликована: Ноя. 5, 2021

"Ternary blending" and "random terpolymerization" strategies have both proven effective for enhancing the performance of organic solar cells (OSCs). However, reports on combination two remain rare. Here, a terpolymer PM6-Si30 was constructed by inserting chlorine alkylsilyl-substituted benzodithiophene (BDT) unit (0.3 equivalent) into state-of-the-art polymer PM6. The exhibitsadeep highest-occupied-molecular-orbital energy good miscibility with PM6 BTP-eC9 (C9) enables its use as third component PM6:PM6-Si30:C9 bulk-heterojunction OSCs. resulting exhibit maximum power conversion efficiency (PCE) 18.27%, which is higher than that obtained optimized control binary PM6:C9-based OSC (17.38%). enhanced attributed to improved charge transport, favorable molecular arrangement, reduced loss suppressed bimolecular recombination. work demonstrates potential random in OSCs highlights new strategy construction ternary system photovoltaic performance.

Язык: Английский

---

In situandex situinvestigations on ternary strategy and co-solvent effects towards high-efficiency organic solar cells

Energy & Environmental Science, Год журнала: 2022, Номер 15(6), С. 2479 - 2488

Опубликована: Янв. 1, 2022

High efficiencies for organic solar cells are achieved. Two different morphology change paths revealed with both in situ and ex measurements.

Язык: Английский

---