A5045220635- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Perovskite Materials and Applications
- Thin-Film Transistor Technologies
- MXene and MAX Phase Materials
- Boron and Carbon Nanomaterials Research
- Crystallization and Solubility Studies
- Semiconductor materials and interfaces
- Aluminum Alloys Composites Properties
- X-ray Diffraction in Crystallography
- Advanced Chemical Physics Studies
- Intermetallics and Advanced Alloy Properties
- Electronic Packaging and Soldering Technologies
- Quantum Dots Synthesis And Properties
- ZnO doping and properties
- Cutaneous Melanoma Detection and Management
- Ferroelectric and Negative Capacitance Devices
- Advanced Memory and Neural Computing
- Fullerene Chemistry and Applications
- Copper Interconnects and Reliability
- Luminescence Properties of Advanced Materials
- Copper-based nanomaterials and applications
- Catalysis for Biomass Conversion
- Organic Light-Emitting Diodes Research
- Catalysis and Hydrodesulfurization Studies
Chinese University of Hong Kong
2020-2025
Shandong University
2024-2025
Soochow University
2025
Anhui University of Technology
2021-2024
Beijing National Laboratory for Molecular Sciences
2024
Chinese Academy of Sciences
2024
Institute of Chemistry
2024
University of Hong Kong
2022-2023
Criminal Investigation Police University of China
2023
Zhejiang University
2022
Abstract Obtaining a finely tuned morphology of the active layer to facilitate both charge generation and extraction has long been goal in field organic photovoltaics (OPVs). Here, solution resolve above challenge via synergistically combining layer‐by‐layer (LbL) procedure ternary strategy is proposed demonstrated. By adding an asymmetric electron acceptor, BTP‐S2, with lower miscibility binary donor:acceptor host PM6:BO‐4Cl, vertical phase distribution can be formed donor‐enrichment at...
Abstract Graded bulk-heterojunction (G-BHJ) with well-defined vertical phase separation has potential to surpass classical BHJ in organic solar cells (OSCs). In this work, an effective G-BHJ strategy via nonhalogenated solvent sequential deposition is demonstrated using nonfullerene acceptor (NFA) OSCs. Spin-coated OSCs deliver outstanding 17.48% power conversion efficiency (PCE). Depth-profiling X-ray photoelectron spectroscopy (DP-XPS) and angle-dependent grazing incidence diffraction...
Abstract Unveiling the correlations among molecular structures, morphological characteristics, macroscopic properties and device performances is crucial for developing better photovoltaic materials achieving higher efficiencies. To achieve this goal, a comprehensive study performed based on four state-of-the-art non-fullerene acceptors (NFAs), which allows to systematically examine above-mentioned from different scales. It’s found that extending conjugation of NFA shows positive effects...
With the continuous breakthrough of efficiency organic photovoltaics (OPVs), their practical applications are on agenda. However, thickness tolerance and upscaling in recently reported high-efficiency devices remains challenging. In this work, multiphase morphology desired carrier behaviors realized by utilizing a quaternary strategy. Notably, exciton separation, mobility, lifetime enhanced significantly, recombination energy loss (Eloss ) reduced, thus beneficial for higher short-circuit...
Morphology is of great significance to the performance organic solar cells (OSCs), since appropriate morphology could not only promote exciton dissociation, but also reduce charge recombination. In this work, we have developed a solid additive-assisted layer-by-layer (SAA-LBL) processing fabricate high-efficiency OSCs. By adding additive fatty acid (FA) into polymer donor PM6 solution, controllable pre-phase separation forms between and FA. This intermixed facilitates diffusion acceptor Y6...
Forming an ideal bulk heterojunction (BHJ) morphology is a critical issue governing the photon to electron process in organic solar cells (OSCs). Complementary widely-used blend casting (BC) method for BHJ construction, sequential (SC) can also enable similar or even better and device performance OSCs. Here, BC SC methods on three representative donor:acceptor (D:A) blends are utilized, that is, PM6:PC71 BM, PM6:IT-4F PM6:L8-BO. Higher power conversion efficiencies (PCEs) all cases by taking...
Power conversion efficiency and long-term stability are two critical metrics for evaluating the commercial potential of organic photovoltaics. Although field has witnessed a rapid progress towards 19%, intrinsic trade-off between is still challenging issue bulk-heterojunction cells due to very delicate crystallization dynamics species. Herein, we developed class non-fullerene acceptors with varied side groups as an alternative aliphatic chains. Among them, conjugated show larger side-group...
Abstract Balancing the charge generation and recombination constitutes a major challenge to break current limit of organic photovoltaics (OPVs). To address this issue, an asymmetric non‐fullerene acceptor, namely AC9, is developed high‐performance OPV with champion efficiency 18.43% (18.1% certified) demonstrated. This represents record value among binary OPVs. Comprehensive analysis on exciton dissociation, collection, carrier transport, has been carried out, unveiling that improved device...
The development of hole-transport materials (HTMs) with high mobility, long-term stability, and comprehensive passivation is significant for simultaneously improving the efficiency stability perovskite solar cells (PVSCs). Herein, two donor-acceptor (D-A) conjugated polymers PBTI PFBTI alternating benzodithiophene (BDT) bithiophene imide (BTI) units are successfully developed desirable hole mobilities due to good planarity extended conjugation molecular backbone. Both copolymers can be...
The large non-radiative recombination is the main factor that limits state-of-the-art organic solar cells (OSCs). In this work, two novel structurally similar oligomers (named 5BDTBDD and 5BDDBDT) with D-A-D-A-D A-D-A-D-A configuration are synthesized for high-performance ternary OSCs low energy loss. As third components, these PM6 analogue effectively suppress in OSCs. Although highest occupied molecular orbital (HOMO) levels of 5BDDBDT higher than PM6, enabled ultra-high...
Abstract Achieving a finely tuned active layer morphology with suitable vertical phase to facilitate both charge generation and transport has long been the main goal for pursuing highly efficient bulk heterojunction all‐polymer solar cells (all‐PSCs). Herein, solution address above challenge via synergistically combining ternary blend strategy layer‐by‐layer (LbL) procedure is proposed. By introducing synthesized polymer acceptor ( P A ), PY‐Cl, higher crystallinity into designed host...
The tuning of vertical morphology is critical and challenging for organic solar cells (OSCs). In this work, a high open-circuit voltage (V
Reducing non-radiative recombination energy loss (ΔE3 ) is one key to boosting the efficiency of organic solar cells. Although recent studies have indicated that Y-series asymmetric acceptors-based devices featured relatively low ΔE3 , understanding mechanism derived from molecular structure change still lagging behind. Herein, two acceptors named BTP-Cl and BTP-2Cl with different terminals were synthesized make a clear comparative study symmetric acceptor BTP-0Cl. Our results suggest...
Terpolymerization and regioisomerization strategies are combined to develop novel polymer donors overcome the difficulty of improving organic solar cells (OSCs) performance. Two isomeric units, bis(2-hexyldecyl)-2,5-bis(4-chlorothiophen-2-yl)thieno[3,2-b]thiophene-3,6-dicarboxylate (TTO) bis(2-hexyldecyl) 2,5-bis(3-chlorothiophen-2-yl)thieno[3,2-b]thiophene-3,6-dicarboxylate (TTI), obtained incorporated into PM6 backbone via random copolymerization form a series terpolymers. Interestingly,...
Organic photovoltaics (OPVs) have achieved great progress in recent years due to delicately designed non-fullerene acceptors (NFAs). Compared with tailoring of the aromatic heterocycles on NFA backbone, incorporation conjugated side-groups is a cost-effective way improve photoelectrical properties NFAs. However, modifications also need consider their effects device stability since molecular planarity changes induced by are related aggregation and evolution blend morphology under stresses....
High-performance all-polymer solar cells (all-PSCs) deeply rely on the joint contributions of desirable optical absorption, adaptive energy levels, and appropriate morphology. Herein, two structural analogous polymerized small-molecule acceptors (PSMAs), PYFCl-T PYF&PYCl-T, are synthesized, then incorporated into PM6:PY-IT binary blends to construct ternary all-PSCs. Due superior compatibility PY-IT PYFCl-T, all-PSC based PM6:PY-IT:PYFCl-T with 10 wt% presents higher more balanced charge...
Abstract Although a suitable vertical phase separation (VPS) morphology is essential for improving charge transport efficiency, reducing recombination, and ultimately boosting the efficiency of organic solar cells (OSCs), there lack theoretical guidance on how to achieve ideal morphology. Herein, relationship between molecular structure VPS pseudo‐planar heterojunction (PPHJ) OSCs established by using surface electrostatic potential (ESP) as bridge. The morphological evolution mechanism...
Abstract Achieving a more balanced charge transport by morphological control is crucial in reducing bimolecular and trap‐assisted recombination enhancing the critical parameters for efficient organic solar cells (OSCs). Hence, facile strategy proposed to reduce crystallinity difference between donor acceptor incorporating novel multifunctional liquid crystal small molecule (LCSM) BDTPF4‐C6 into binary blend. first LCSM based on tetrafluorobenzene unit features low phase transition...
Abstract Large energy loss is one of the main limiting factors for power conversion efficiencies (PCEs) organic solar cells (OSCs). To this effect, chemical modifications famous Y‐series nonfullerene acceptor (NFA) BTP‐4Cl‐BO with a new end group, TPC‐Cl, whose π‐conjugation extended through fusing 3‐(dicyanomethylene)indanone (IC) group chlorinated thiophene ring, to synthesize two novel NFAs, BTP‐T‐2Cl and BTP‐T‐3Cl are performed. For TPC‐Cl groups, resulting OSC exhibits modest PCE 14.89%...