A5030726811- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Perovskite Materials and Applications
- Photochemistry and Electron Transfer Studies
- Spectroscopy and Quantum Chemical Studies
- Innovative Microfluidic and Catalytic Techniques Innovation
- Organic and Molecular Conductors Research
- Heat Transfer and Boiling Studies
- Thin-Film Transistor Technologies
- Microfluidic and Capillary Electrophoresis Applications
Shandong University
2021-2025
State Key Laboratory of Crystal Materials
2021-2025
Crystal Research (United States)
2025
Shenyang University of Technology
2022
Abstract Despite the simplified fabrication process and desirable microstructural stability, limited charge transport properties of block copolymers double‐cable conjugated polymers hinder overall performance single‐component photovoltaic devices. Based on key distinction in donor (D)–acceptor (A) bonding patterns between bulk heterojunction (BHJ) devices, rationalizing difference mechanisms is crucial to understanding structure–property correlation. Herein, barrier formed D–A covalent bond...
Optimizing the photoluminescence quantum yield (PLQY) of non-fullerene acceptor (NFA) molecules is critical for reducing non-radiative recombination energy loss in NFA-based organic solar cells. In this letter, by developing a non-adiabatic dynamical method combined with different electron population rate equations, we separately simulate radiative and process NFA molecular excited state, thus clarify quantitative correlations typical characteristics their PLQY, including analyses...
Ternary bulk heterojunction (BHJ) organic solar cells have energy offsets between multiple donors and acceptors. In such bi-continuous percolating films, electron carriers mainly transport in acceptor materials, hole typically donor materials. Changing the third component of additional or acceptors is a common method to fine-tune properties ternary BHJs. Experimentally, although there are some empirical guidelines for mobility evaluation, clear charge transporting model has still not been...
The photoinduced electron transition details and the resulting intra- inter-CT dynamics are clarified in different NFA molecular aggregates, providing a microscopic understanding for their experimental observations.
Improving the radiative recombination rate of nonfullerene acceptor (NFA) molecular excited states can help to promote their photoluminescence quantum yield and thus reduce nonradiative energy loss in NFA-based organic solar cells. In this Letter, by developing a nonadiabatic dynamical simulation method, we clarify quantitative correlations some typical characteristics NFA molecules with rates. For single molecule, weakening electron-phonon coupling strengthening electron-push-pull potential...
Organic solar cells (OSCs) based on nonfullerene-acceptors (NFAs) have achieved rapid development, while the role of donor/acceptor (D/A) interfaces in NFA heterosystems has not been fully addressed. Here, we clarify that photoinduced spontaneous charge separation efficiency typical can reach up to 67%, and contributed by D/A interface is only 25%. The more important reducing recombination rate, especially optimizing competition between radiative nonradiative recombination, thus voltage...
The energy loss of hole-charge transfer in nonfullerene-acceptor (NFA) organic solar cells has been significantly reduced by minimizing their interfacial offset to near-zero and negative values. However, the physical mechanism highly efficient these conditions not fully addressed. In this work, we theoretically clarify that a moving hole charge along polymer-donor NFA interface, generated from spontaneous dissociation molecular excited states, tends molecules keep moving, even is chosen as...
By employing a femtosecond electric pump pulse, we theoretically investigate the re-excitation dynamics of “cold” charge transfer (CCT) state at organic donor/acceptor (D/A) interfaces. It is demonstrated that relaxed CCT can be pushed to different “hot” CT (HCT) states via experiencing electron (HCT1 state) and/or hole (HCT2 higher-energy transitions, where transition modes and probabilities are primarily determined by pulse energy. Without assistance driving field, both two HCT relax...
In order to investigate the influence of unit junction on micromixer performance, a repetitive structure with total length 12.3 mm was proposed. This consists T-shape inlet channel and six cubic mixing units, as well junctions between them. Numerical simulations show that, when are all located at geometric center unit, outlet index is 72.12%. At same flow velocity, best achieved 97.15% increased by 34.68% were different corners unit. The improvement in illustrated that non-equilibrium...
Nonfullerene acceptor (NFA) molecules have attracted significant attention in high‐efficient heterojunction organic solar cells (OSCs) due to their push–pull electronic structures. Herein, using a universal quantum model for an donor/acceptor interface composed of polymer donor and NFA molecule, effect the molecular electron push pull ability on interfacial charge dynamics case excitation is focused on. It confirmed that energy transfer coexist compete during dynamics, by which hybrid state...