A5082813697- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Perovskite Materials and Applications
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Metal-Organic Frameworks: Synthesis and Applications
- Chemical Synthesis and Characterization
- Thin-Film Transistor Technologies
- Solid-state spectroscopy and crystallography
- Quantum Dots Synthesis And Properties
- Crystallography and molecular interactions
- Organic Light-Emitting Diodes Research
- Radioactive element chemistry and processing
- Transition Metal Oxide Nanomaterials
- Magnetism in coordination complexes
- Crystal structures of chemical compounds
- Crystal Structures and Properties
- Molecular Junctions and Nanostructures
- Polymer composites and self-healing
- Asymmetric Synthesis and Catalysis
- Synthetic Organic Chemistry Methods
- Advanced Memory and Neural Computing
- Catalytic C–H Functionalization Methods
- Chemical Synthesis and Analysis
- Chalcogenide Semiconductor Thin Films
Chinese Academy of Sciences
2018-2025
Beijing National Laboratory for Molecular Sciences
2018-2025
Institute of Chemistry
2018-2025
University of Chinese Academy of Sciences
2021-2025
Aerospace Information Research Institute
2024
Ministry of Industry and Information Technology
2020-2024
Harbin Institute of Technology
2019-2024
Soochow University
2024
China University of Mining and Technology
2024
Shandong Institute of Automation
2024
Abstract In organic solar cells (OSCs), cathode interfacial materials are generally designed with highly polar groups to increase the capability of lowering work function cathode. However, strong group could result in a high surface energy and poor physical contact at active layer surface, posing challenge for interlayer engineering address trade-off between device stability efficiency. Herein, we report hydrogen-bonding material, aliphatic amine-functionalized perylene-diimide (PDINN),...
Achieving efficient charge transfer at small frontier molecular orbital offsets between donor and acceptor is crucial for high performance polymer solar cells (PSCs). Here we synthesize a new wide band gap donor, PTQ11, low acceptor, TPT10, report power conversion efficiency (PCE) PSC (PCE = 16.32%) based on PTQ11–TPT10 with zero HOMO (the highest occupied orbital) offset (ΔEHOMO(D–A)). TPT10 derivative of Y6 monobromine instead bifluorine substitution, possesses upshifted lowest unoccupied...
A new small molecule acceptor, Y18, was designed and synthesized. Over 17% efficiency obtained with single junction solar cells based on Y18.
Perovskite/CIGS tandem cells Tandem solar can boost efficiency by using more of the available spectrum. Han et al. fabricated a two-terminal cell with an inorganicorganic hybrid perovskite top layer and Cu(In,Ga)Se 2 (CIGS) bottom layer. Control roughness CIGS surface use heavily doped organic hole transport were crucial to achieve 22.4% power conversion efficiency. The unencapsulated maintained almost 90% their after 500 hours operation under ambient conditions. Science , this issue p. 904
The precise control of stoichiometric balance and ionic defects on the surface solution-processed perovskite is critical to performance stability solar cells (pero-SCs). Here, we introduce a low-cost stable conjugated donor polymer (PTQ10) as interfacial layer in planar n–i–p structured pero-SCs. was applied intermediate phase before thermal annealing. This treatment significantly reduced loss organic cation during Importantly, kinetics conversion influenced, crystal showed more preferential...
Abstract All-polymer solar cells (all-PSCs) based on polymerized small molecular acceptors (PSMAs) have made significant progress recently. Here, we synthesize two A-DA’D-A molecule acceptor PSMAs of PS-Se with benzo[c][1,2,5]thiadiazole A’-core and PN-Se benzotriazole A’-core, for the studies effect structure photovoltaic performance PSMAs. The possess broad absorption showing more red-shifted than suitable electronic energy levels application as polymer in all-PSCs PBDB-T donor. Cryogenic...
Abstract It is very important to fine‐tune the nanoscale morphology of donor:acceptor blend active layers for improving photovoltaic performance all‐small‐molecule organic solar cells (SM‐OSCs). In this work, two new small molecule donor materials are synthesized with different substituents on their thiophene conjugated side chains, including SM1‐S alkylthio and SM1‐F fluorine alkyl substituents, previously reported SM1 an substituent, investigating effect chains molecular aggregation...
Asymmetric photoredox catalysis offers exciting opportunities to develop new synthetic approaches chiral molecules through novel reaction pathways. Employing the first-row transition metal complexes as catalysts remains, however, a formidable challenge, although these are economic, environmentally friendly, and often exhibit special reactivities. We report in this Article development of one class highly efficient asymmetric/photoredox bifunctional based on copper(II) bisoxazoline (CuII–BOX)...
Abstract Side‐chain engineering has been an effective strategy in tuning electronic energy levels, intermolecular interaction, and aggregation morphology of organic photovoltaic materials, which is very important for improving the power conversion efficiency (PCE) solar cells (OSCs). In this work, two D–A copolymers, PBQ5 PBQ6, are designed synthesized based on bithienyl‐benzodithiophene (BDTT) as donor (D) unit, difluoroquinoxaline (DFQ) with different side chains acceptor (A) thiophene...
Abstract Four low‐cost copolymer donors of poly(thiophene‐quinoxaline) (PTQ) derivatives are demonstrated with different fluorine substitution forms to investigate the effect fluorination on charge separation and voltage loss ( V ) polymer solar cells (PSCs) PTQ as donor a A–DA'D–A‐structured molecule Y6 acceptor. The four PTQ7 without fluorination, PTQ8 bifluorine substituents its thiophene D‐unit, PTQ9, PTQ10 monofluorine their quinoxaline A‐unit respectively. PTQ8‐ based PSC demonstrates...
Abstract Tandem organic solar cells are based on the device structure monolithically connecting two to broaden overall absorption spectrum and utilize photon energy more efficiently. Herein, we demonstrate a simple strategy of inserting double bond between central core end groups small molecule acceptor Y6 extend its conjugation length range. As result, new narrow bandgap BTPV-4F was synthesized with an optical 1.21 eV. The single-junction devices as achieved power conversion efficiency over...
Abstract Demonstrated in this work is a simple random ternary copolymerization strategy to synthesize series of polymer acceptors, PTPBT‐ET x , by polymerizing small‐molecule acceptor unit modified from Y6 with thiophene connecting and controlled amount an 3‐ethylesterthiophene (ET) unit. Compared PTPBT only Y6‐like units units, (where represents the molar ratio ET unit) incorporated copolymers show up‐shifted LUMO energy levels, increased electron mobilities, improved blend morphologies...
Poly(ethylene glycol) diacrylate (PEGDA) is introduced into the SnO2 dispersion as polymer framework to hinder agglomeration. The PEGDA-modified acted electron transport layer (ETL) in n-i-p structured perovskite solar cells (pero-SCs). It demonstrated that PEGDA plays multifunctional roles enhancement of photovoltaic performance and stability against illumination humility. First, ETL more uniform, its energy level matched well with perovskite, which could facilitate carrier reduce loss....
Two isomeric A–DA′D–A type SMAs o -TEH and m were designed synthesized, the PCE of OSC based on PBQ6: reached 18.51%.
Abstract Organic solar cells (OSCs) have experienced rapid progress with the innovation of near‐infrared (NIR)‐absorbing small‐molecular acceptors (SMAs), while unique electronic properties SMAs raise new challenges in relation to cathode engineering for effective electron collection. To address this issue, two fluorinated perylene‐diimides (PDIs), PDINN‐F and PDINN‐2F, are synthesized by a simple fluorination method, application as interlayer (CIL) materials. The bay‐fluorinated PDI‐based...
Combining the high stability under UV light of wide bandgap (WBG) perovskite solar cells (pero-SCs) and broad near-infrared absorption spectra narrow (NBG) organic (OSCs), perovskite/organic tandem (TSCs) with WBG pero-SC as front cell NBG OSC rear have attracted attention . However, photovoltaic performance TSCs needs to be further improved. Herein, nonradiative charge recombination loss is reduced through bulk defect passivation in subcell broadening range cell. For pero-SCs, an cation...
Abstract For polymer solar cells (PSCs), the mixture of donors and small‐molecule acceptors (SMAs) is fine‐tuned to realize a favorable kinetically trapped morphology thus commercially viable device efficiency. However, thermodynamic relaxation mixed domains within blend raises concerns related long‐term operational stability devices, especially in record‐holding Y‐series SMAs. Here, new class dimeric Y6‐based SMAs tethered with differential flexible spacers reported regulate their...
Reducing the energy loss of sub-cells is critical for high performance tandem organic solar cells, while it limited by severe non-radiative voltage via formation non-emissive triplet excitons. Herein, we develop an ultra-narrow bandgap acceptor BTPSeV-4F through replacement terminal thiophene selenophene in central fused ring BTPSV-4F, constructing efficient cells. The substitution further decrease optical BTPSV-4F to 1.17 eV and suppress exciton BTPSV-4F-based devices. cells with as...
All-polymer solar cells (all-PSCs) have drawn growing attention and achieved tremendous progress recently, but their power conversion efficiency (PCE) still lags behind small-molecule-acceptor (SMA)-based PSCs due to the relative difficulty on morphology control of polymer photoactive blends. Here, low-cost PTQ10 is introduced as a second donor (a third component) into PM6:PY-IT blend finely tune energy-level matching microscopic layer. The addition decreases π-π stacking distance, increases...