A5101587906- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Perovskite Materials and Applications
- Advanced ceramic materials synthesis
- Organic Light-Emitting Diodes Research
- Aluminum Alloys Composites Properties
- Advanced Nanomaterials in Catalysis
- Advanced biosensing and bioanalysis techniques
- Advanced Polymer Synthesis and Characterization
- Analytical Chemistry and Sensors
- Silicone and Siloxane Chemistry
- Thin-Film Transistor Technologies
- Microfluidic and Capillary Electrophoresis Applications
- Advanced Chemical Sensor Technologies
- Carbon and Quantum Dots Applications
- Advanced materials and composites
- MXene and MAX Phase Materials
- Electrochemical sensors and biosensors
- Advanced Sensor and Energy Harvesting Materials
- Quantum Dots Synthesis And Properties
- biodegradable polymer synthesis and properties
- Boron and Carbon Nanomaterials Research
- Fullerene Chemistry and Applications
- Biosensors and Analytical Detection
- Polymer composites and self-healing
University of Chinese Academy of Sciences
2016-2021
Center for Excellence in Education
2021
Center for NanoScience
2020-2021
National Center for Nanoscience and Technology
2020-2021
Institute of Chemistry
2007-2018
State Key Laboratory of Polymer Physics and Chemistry
2014-2018
Chinese Academy of Sciences
2006-2018
Beijing National Laboratory for Molecular Sciences
2014-2018
Hohai University
2014-2018
Ministry of Agriculture and Rural Affairs
2018
A new polymer donor (PBDB-T-SF) and a small molecule acceptor (IT-4F) for fullerene-free organic solar cells (OSCs) were designed synthesized. The influences of fluorination on the absorption spectra, molecular energy levels, charge mobilities systematically studied. PBDB-T-SF:IT-4F-based OSC device showed record high efficiency 13.1%, an over 12% can be obtained with thickness 100-200 nm, suggesting promise OSCs in practical applications.
To simultaneously achieve low photon energy loss (Eloss) and broad spectral response, the molecular design of wide band gap (WBG) donor polymer with a deep HOMO level is critical importance in fullerene-free solar cells (PSCs). Herein, we developed new benzodithiophene unit, i.e., DTBDT-EF, conducted systematic investigations on WBG DTBDT-EF-based polymer, namely, PDTB-EF-T. Due to synergistic electron-withdrawing effect fluorine atom ester group, PDTB-EF-T exhibits higher oxidation...
A novel non-fullerene acceptor, possessing a very low bandgap of 1.34 eV and high-lying lowest unoccupied molecular orbital level -3.95 eV, is designed synthesized by introducing electron-donating alkoxy groups to the backbone conjugated small molecule. Impressive power conversion efficiencies 8.4% 10.7% are obtained for fabricated single tandem polymer solar cells.
Fabricating organic solar cells (OSCs) with a tandem structure has been considered an effective method to overcome the limited light absorption spectra of photovoltaic materials. Currently, most efficient OSCs are fabricated by adopting fullerene derivatives as acceptors. In this work, we designed new non-fullerene acceptor optical band gap (Egopt) 1.68 eV for front subcells and optimized phase-separation morphology fullerene-free active layer Egopt 1.36 fabricate rear subcell. The two show...
Two wide band gap polymer donors were developed for fullerene-free solar cells. The photovoltaic performance of the PB3T:IT-M device processed by anisole achieved a high PCE 11.9%.
To realize high power conversion efficiencies (PCEs) in green‐solvent‐processed all‐polymer solar cells (All‐PSCs), a long alkyl chain modified perylene diimide (PDI)‐based polymer acceptor PPDIODT with superior solubility nonhalogenated solvents is synthesized. A properly matched PBDT‐TS1 selected as the donor due to red‐shifted light absorption and low‐lying energy level order achieve complementary spectrum between acceptor. By utilizing anisole processing solvent, an optimal efficiency of...
Highly efficient polymer solar cells with a tandem structure are fabricated by using two excellent photovoltaic polymers and highly transparent intermediate recombination layer. Power conversion -efficiencies over 10% can be realized response within 800 nm.
Noncovalent conformational locks are broadly employed to construct highly planar π-conjugated semiconductors exhibiting substantial charge transport characteristics. However, current chalcogen-based lock strategies for organic limited S···X (X = O, N, halide) weak interactions. An easily accessible (minimal synthetic steps) and structurally selenophene-based building block, 1,2-diethoxy-1,2-bisselenylvinylene (DESVS), with novel Se···O noncovalent is designed synthesized. DESVS unique...
A polymer solar cell was fabricated with a high open-circuit voltage of 1.13 V and low energy loss 0.46 eV.
Abstract Currently, solution‐processed MoO x anode interfacial layers (AILs) can only be fabricated by the spin‐coating method in organic solar cells (OSCs), which severely limits their use practical productions where large‐area printing techniques are used. Herein, a facile is demonstrated to prepare highly conductive (denoted EG:Mo) that processed methods such as wire‐bar and blade coatings. The EG:Mo films prepared depositing an aqueous solution containing ammonium heptamolybdate (VI)...
Three pH neutral conjugated polymers based on thiophene and benzene derivatives, namely PCP-Na, PCF-Na, PFS-Na, were designed synthesized. In the three polymers, PCP-Na exhibited a self-doping effect in aqueous solution, thin film of demonstrated high electrical conductivity 1.66 × 10–3 S/cm deep HOMO level −5.22 eV; these properties make it an ideal anode interfacial layer (AIL) material polymer solar cells (PSCs). The single-junction PSC modified with AIL showed PCE 9.89%, which is...
Conjugated polymers have rigid backbones and strong interchain π–π interaction in aggregation state, so their morphologies thin films could be significantly affected by backbone conformation. In this work, taking two highly efficient photovoltaic (PDTBT-TT PBT4T) as example, we investigated the correlations among chemical structure of units, thermodynamic stability conformation, curvature, phase transformation kinetics, crystalline properties utilizing quantum chemistry calculation,...
Herein, poly(vinylpyrrolidone) (PVP) is used as the cathode interlayer (CIL) through self-organization method in inverted organic solar cells (OSCs). By coating a solution of PVP and active layer materials onto glass/indium tin oxide (ITO) substrate, can segregate to near ITO side due its high surface energy strong intermolecular interaction with electrode. The power conversion efficiency (PCE) obtained OSC device reaches 13.3%, much higher than that control PCE only 10.1%. improvement...
This work suggests an effective material design strategy to prepare efficient PSCs with a green solvent, which is important in PSCs.
Abstract Herein, a novel and effective method to prepare n‐doped MoO x films with highly improved conductivity is reported. The are readily prepared by spin‐coating an aqueous solution containing ammonium molybdate tetrahydrate vitamin C (VC). As confirmed UV–vis absorption, X‐ray photoelectron spectroscopy ultraviolet measurements, Mo(VI) partially reduced Mo(V) VC, resulting in the n‐doping of . (H:V‐Mo) film can be enhanced four orders magnitude compared pristine (H‐Mo), that is, from 1.2...
Alkyl side chains play critical roles in the molecular design of conjugated polymers for applications bulk-heterojunction (BHJ) polymer solar cells (PSCs).
The polymer solar cells fabricated by the green solvent (anisole/diphenyl ether) exhibited an outstanding PCE of 8.37%.
Efficient fullerene-based and fullerene-free PSCs were fabricated based on two wide band gap polymers PBT-TTz PBT-S-TTz.