A5115444786- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Perovskite Materials and Applications
- Thin-Film Transistor Technologies
- Luminescence and Fluorescent Materials
- Photonic and Optical Devices
- Analytical Chemistry and Sensors
- Polyoxometalates: Synthesis and Applications
- Advanced MRI Techniques and Applications
- Gas Sensing Nanomaterials and Sensors
- Quantum optics and atomic interactions
- Advanced Chemical Sensor Technologies
- Non-Invasive Vital Sign Monitoring
- Optical Imaging and Spectroscopy Techniques
- Nanowire Synthesis and Applications
- Atomic and Subatomic Physics Research
South China University of Technology
2016-2023
State Key Laboratory of Pulp and Paper Engineering
2019-2021
State Key Laboratory of Luminescent Materials and Devices
2016-2021
Pulp and Paper Research Institute
2021
Abstract While the performance of laboratory‐scale organic solar cells (OSCs) continues to grow over 13%, development high‐efficiency large area OSCs still lags. One big challenge is that formation bulk heterojunction morphology an extremely complicated process and formed also a highly delicate balance involving many parameters such as domain size, purity, miscibility, etc. The control becomes much more challenging when device scaled up. In this work, efficient (12.9%) nonfullerene cell...
Abstract Semitransparent organic solar cells (ST‐OSCs) have promising prospects for building or vehicle integrated energy harvesting with generation and see‐through function. How to achieve both an adequate average visible transmittance (AVT) high‐power conversion efficiency (PCE) is always the key issue. Herein, a simple but effective strategy constructing high performance ST‐OSCs by introducing small molecule [2‐(9‐H‐Carbazol‐9‐yl) ethyl] phosphonic acid (2PACz) into low‐donor content...
Abstract All‐polymer solar cells (all‐PSCs) that contain both p‐type and n‐type polymeric materials blended together as light‐absorption layers have attracted much attention, since the blend of a donor acceptor should present superior photochemical, thermal, mechanical stability to those small molecular‐based organic cells. In this work, interfacial is studied by using highly stable all‐polymer cell platform. It found thermally deposited metal electrode atoms can diffuse into active layer...
We design and synthesize a series of high-mobility n-type polyelectrolytes with different anions <italic>via</italic> quaternisation polymerisation, which can be utilized as thickness-insensitive electron-transporting materials for polymer solar cells.
The vertical composition distribution and crystallinity of photoactive layers are considered to have critical roles in photovoltaic performance. In this concise contribution, the layer-by-layer (LBL) solution process is used fabricate efficient polymer solar cells. results show that can be finely regulated via employing solvent additive 1,8-diiodooctane (DIO). favorable component tandem with improved induced by DIO contributes exciton dissociation, charge transportation extraction, limited...
While the performance of laboratory‐scale organic solar cells (OSCs) continues to grow, development high efficiency large area OSCs remains a big challenge. Although few attempts produce have been reported, there are still challenges on way realizing efficient module devices, such as low compatibility thickness‐sensitive active layer with coating techniques, frequent need for toxic solvents and tedious optimization processes used during device fabrication. In this work, highly...
Dithieno[3′,2′:3,4;2′′,3′′:5,6]benzo[1,2-<italic>c</italic>][1,2,5]thiadiazole (fDTBT)-based polymer donors with tunable energy levels by sulfur/fluorine side-chains are designed and enable high-efficiency all-polymer solar cells a maximum efficiency of 15.8%.
Abstract The performance of organic photodetectors (OPDs) sensitive to the short‐wavelength infrared (SWIR) light lags behind commercial indium gallium arsenide (InGaAs) primarily due scarcity semiconductors with efficient photoelectric responses exceeding 1.3 µm. Limited by Energy‐gap law, ultralow‐bandgap usually suffer from severe non‐radiative transitions, resulting in low external quantum efficiency (EQE). Herein, a difluoro‐substituted quinoid terminal group (QC‐2F) exceptionally...
Semitransparent organic solar cells (ST-OSCs) have been regarded as a promising candidate for building integrated photovoltaics. In general, most of the ST-OSCs are based on bulk heterojunction (BHJ) structure in which morphology BHJ film must be delicately optimized. this work, we introduce sequentially deposited bilayer into by using PTB7-Th/IEICO-4F combination. The adoption not only simplifies device optimization, but it is also found that, donor and acceptor separately deposited, power...
Herein, all‐polymer solar cells (all‐PSCs) are studied based on PTzBI:N2200 system processed from two different solvents, chlorobenzene (CB) and 2‐methyltetrahydrofuran (Me‐THF). It is found that the preaggregation of donor acceptor polymers in Me‐THF key factor enables a drastic enhancement cell efficiency ≈1% (processed by CB) to ≈11% Me‐THF). When using CB as solvent, both well dissolved mostly disaggregated. In contrast, exhibit strong aggregation Me‐THF. As result, blend films pure...
Abstract In this study, we demonstrate that high‐efficiency blade‐coated organic solar cells (OSCs) can be obtained by using polymer additive N2200 to suppress the excessive aggregation of nonfullerene acceptor. When blade‐coating method, OSCs based on blends PM6:IT‐4F and PM6:Y6 show moderate efficiencies 9.9% 13.2%, respectively. However, when a small amount is added into binary active layers, resulting much higher 13.0% 16.0%. Careful investigation reveals suppresses acceptors in layer....
Abstract Photomultiplication‐type organic photodetectors (PM‐OPDs) effectively amplify photogenerated signals, eliminating the need for external amplifiers and simplifying detection systems. Current designs require high bias voltages, leading to significant power consumption. This study introduces PM‐OPDs with reduced voltage by incorporating a hole‐blocking layer (HBL) between active electrode. Deep HOMO level thin HBL facilitate hole accumulation energy bending, lowering enhancing electron...
Rapid developments in material design have led to significant breakthroughs the power conversion efficiency (PCE) of all‐polymer solar cells (all‐PSCs) recent years. However, most these devices are processed using halogenated solvents. Here, nonhalogenated solvent o ‐xylene ( ‐XY)‐processed all‐PSCs based on PBDB‐T:PJ1 studied. Interestingly, it is found that can be greatly improved 14.34% by simply increasing spin‐coating speed during device processing. Careful studies reveal this...
Photomultiplication-type organic photodetectors (PM-OPDs) provide for signal amplification, ideal detecting faint light, and simplifying detection systems. However, current designs often suffer from slow response speed elevated dark current. Conversely, photovoltaic-type (PV-OPDs) fast high specific detectivity (D*) but have limited photoresponse. This study presents the synthesis incorporation of a non-fullerene acceptor, BFDO-4F, into active layer to introduce trap states capturing...
Abstract Photomultiplication‐type organic photodetectors (PM‐OPDs) are highly effective for detecting weak optical signals; however, achieving a balance between high gain, broad spectral sensitivity, fast response, and low operating voltage remains significant challenge. In this study, solution‐processed approach utilizing tailored non‐fullerene acceptors (NFAs) is presented to enhance electron trapping enable efficient photomultiplication. Two NFAs, BFDO‐Eh‐4F BPDO‐Eh‐4F, with distinct LUMO...
This paper focuses on standardized fabrications of atomic vapor cells with multipass cells. For this purpose, we have built a vacuum system that enables sealing the mulipass-cavity-assisted cell under vacuum. Alkali atoms are prepared inside glass holder, and tip holder is broken by controlled collisions Atoms then transferred to body part heating. Once enough accumulate part, buffer quenching gases filled into system, moved contact silicon wafer which bonded Herriott-cavity. The cavity...
Short-wavelength infrared organic photodetectors (SWIR OPDs) have great potential for applications in health monitoring, night vision, optical communication, and image sensing. However, the development of SWIR OPDs is limited by challenges achieving high responsivity (R) detectivity (D*) due to exponentially increased nonradiative recombination rate when decreasing bandgap conjugated polymers or molecules. In this study, we designed synthesized a series donor-acceptor (D-A) type ultralow...
Efficiency and stability of polymer solar cells (PSCs) are the two most significant decisive factors for purpose actual applications. Here, highly efficient stable ternary PSCs were fabricated by incorporating well-compatible donors (poly[4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b;4,5-b0]dithiophene-2,6-diyl-alt-(4-(2-ethylhexyl)-3-fluorothieno[3,4-b]thiophene-)-2-carboxylate-2-6-diyl]...
In the field of organic solar cells (OSCs), interfacial layer plays role enhancing carrier extraction/transportation, inhibiting their recombination, etc. contrast to wide variety cathode materials with good modification ability, much less effort has been reported for anode materials. this study, we report a polyoxometalate-based inorganic molecular cluster, zinc phosphotungstate (Zn3P2W24O80, denoted ZnPW), as an layer. Based on PM6/EH-HD-4F/L8-BO-F ternary system, device ZnPW achieved high...
Thickness‐insensitivity of organic solar cells (OSCs) is a crucial issue for transformation from the laboratory‐scale devices to large‐area panels. Generally, low carrier mobility semiconductors hindering charge transport process leads severe recombination losses and further poisons fill factor (FF) in thick‐film OSCs. Herein, PEDOT:PSS‐free pseudoplanar heterojunction OSC sequential deposition method with self‐organized [2‐(9H‐carbazol‐9‐yl)ethyl]phosphonic acid interlayer fabricated. The...
Ternary all-polymer solar cells are fabricated using an N2200 acceptor and two donor polymers (PF2 PM2) with complementary absorption. The major PF2 is a relatively wide bandgap polymer that contributes the most photon absorption in UV-vis region while second PM2 improves light harvesting due to its strong near-IR region. By carefully tuning ratio of polymers, best 9 : 1 5 N2200) achieved shows PCE 6.90%, which better than binary devices. This work demonstrates effective strategy utilizing...