Search results for: Xiao-Tao Hao

Items from 1 to 20 out of 36 results

article

π–π Stacking Modulation via Polymer Adsorption for Elongated Exciton Diffusion in High‐Efficiency Thick‐Film Organic Solar Cells

Zhen Fu, Jia‐Wei Qiao, Feng‐Zhe Cui, Wen‐Qing Zhang, more

Advanced Materials > 36 > 21 > n/a - n/a

Developing efficient organic solar cells (OSCs) with thick active layers is crucial for roll‐to‐roll printing. However, thicker layers often result in lower efficiency. This study tackles this challenge using a polymer adsorption strategy combined with a layer‐by‐layer approach. Incorporating insulator polystyrene (PS) into the PM6:L8‐BO system creates PM6+PS:L8‐BO blends, effectively suppressing...

article

Achieving High Fill Factor in Organic Photovoltaic Cells by Tuning Molecular Electrostatic Potential Fluctuation

Guanlin Wang, Jingwen Wang, Yong Cui, Zhihao Chen, more

Angewandte Chemie International Edition > 63 > 17 > n/a - n/a

In the field of organic photovoltaics (OPVs), significant progress has been made in tailoring molecular structures to enhance the open‐circuit voltage and the short‐circuit current density. However, there remains a crucial gap in the development of coordinated material design strategies focused on improving the fill factor (FF). Here, we introduce a molecular design strategy that incorporates electrostatic...

article

Achieving High Fill Factor in Organic Photovoltaic Cells by Tuning Molecular Electrostatic Potential Fluctuation

Guanlin Wang, Jingwen Wang, Yong Cui, Zhihao Chen, more

Angewandte Chemie > 136 > 17 > n/a - n/a

article

Efficient Ultrathin Self‐Powered Organic Photodetector with Reduced Exciton Binding Energy and Auxiliary Föster Resonance Energy Transfer Processes

Jia‐Wei Qiao, Feng‐Zhe Cui, Lin Feng, Peng Lu, more

Advanced Functional Materials > 33 > 30 > n/a - n/a

Recent advances in organic photodetectors (OPDs) have enabled high detectivity, high quantum efficiency, and fast response, due to their broad spectral response, easy processing, compatibility with flexible devices, and cooling‐free operations. The advantages of combining ultrathin and self‐powered OPDs are rarely explored, as technological limitations and lack of knowledge on the underlying mechanisms...

article

Ternary‐Assisted Sequential Solution Deposition Enables Efficient All‐Polymer Solar Cells with Tailored Vertical‐Phase Distribution

Feng‐Zhe Cui, Zhi‐Hao Chen, Jia‐Wei Qiao, Tong Wang, more

Advanced Functional Materials > 32 > 24 > n/a - n/a

All‐polymer solar cells (all‐PSCs) have received attention in recent years for their desirable properties in power conversion efficiency and long‐term operational stability. However, it is still a big challenge to acquire an “ideal” vertical‐phase distribution of polymer/polymer blends due to the non‐ideal molecular conformations and mixing behaviors. Herein, a ternary‐assisted sequential solution...

article

Non‐Fullerene Acceptors: Suppressing Kinetic Aggregation of Non‐Fullerene Acceptor via Versatile Alloy States Enables High‐Efficiency and Stable Ternary Polymer Solar Cells (Adv. Funct. Mater. 20/2021)

Kang‐Ning Zhang, Jia‐Jia Guo, Liu‐Jiang Zhang, Chao‐Chao Qin, more

Advanced Functional Materials > 31 > 20 > n/a - n/a

In article number 2100316, Xiao‐Tao Hao and co‐workers investigate the stabilizing function of alloy states from the perspective of controlling the aggregation of non‐fullerene acceptors. The acceptor alloys strengthen the conformational rigidity of BTP‐4Cl to restrain the intramolecular vibrations for rapid relaxation of high‐energy excited states to stabilize BTP‐4Cl. The donor alloys optimize the...

article

Suppressing Kinetic Aggregation of Non‐Fullerene Acceptor via Versatile Alloy States Enables High‐Efficiency and Stable Ternary Polymer Solar Cells

Kang‐Ning Zhang, Jia‐Jia Guo, Liu‐Jiang Zhang, Chao‐Chao Qin, more

Advanced Functional Materials > 31 > 20 > n/a - n/a

Despite considerable advances devoted to improving the operational stability of organic solar cells (OSCs), the metastable morphology degradation remains a challenging obstacle for their practical application. Herein, the stabilizing function of the alloy states in the photoactive layer from the perspective of controlling the aggregation characteristics of non‐fullerene acceptors (NFAs), is revealed...

article

Modification of Hole Transport Layers for Fabricating High Performance Non‐fullerene Polymer Solar Cells

B. Hari Babu, Chengkun Lyu, Hongwei Zhang, Zhihao Chen, more

Chinese Journal of Chemistry > 38 > 8 > 817 - 822

Interfacial engineering is expected to be a feasible strategy to improve the charge transport properties of the hole transport layer (HTL), which is of crucial importance to boost the device performance of organic solar cells (OSCs). In this study, two types of alcohol soluble materials, 2,3,5,6‐tetrafluoro‐7,7,8,8‐tetracyanoquinodimethane (F₄‐TCNQ) and di‐tetrabutylammoniumcis–bis(isothiocyanato)bis...

article

Systematic control of optical features in aluminosilicate glass waveguides using direct femtosecond laser writing

B. Hari Babu, Mengsi Niu, Xiaoyu Yang, Yanbo Wang, more

Optical Materials > 2017 > 72 > C > 501-507

Low loss optical waveguides inside aluminosilicate glasses have been successfully fabricated using direct femtosecond laser writing. To establish the influence of pulse energy and host variations on the optical waveguides have been tentatively explored and systematically studied with the help of different spectroscopic techniques. Isochronal annealing treatment effectively reduces the insertion losses...

article

Laser-induced crystallization and conformation control of poly(3-hexylthiophene) for improving the performance of organic solar cells

Lin Feng, Fei Zheng, Peng-Qing Bi, Xiao-Yu Yang, more

Organic Electronics > 2017 > 49 > C > 157-164

Femto-second laser irradiation on P3HT:PCBM solutions have been demonstrated to have a significant impact on the conformational structures and photovoltaic performance of the resultant thin films. The crystallinity and edge-on/face-on conformations of P3HT and the aggregation of PCBM can be manipulated by controlling the wavelength (400–800 nm) and illumination duration (1–3 h) of the lasers. Grazing...

article

Aqueous self-assembled perovskite microfibers for sensitive photodetectors

Wei-Long Xu, Meng-Si Niu, Xiao-Yu Yang, Hong-Chun Yuan, more

Organic Electronics > 2017 > 48 > C > 106-111

Perovskite microfibers with high crystallinity were synthesized with aqueous self-assembling method. The crystallization dynamics of perovskite were studied by in-situ X-ray diffraction, demonstrating that the optimum crystallization time is 9 h. Spatially and temporally resolved fluorescence measurement clearly shows the different recombination mechanism at the interface and bulk regions in the perovskite...

article

Poly(3-hexylthiophene) coated graphene oxide for improved performance of bulk heterojunction polymer solar cells

Fei Zheng, Xiao-Yu Yang, Peng-Qing Bi, Meng-Si Niu, more

Organic Electronics > 2017 > 44 > C > 149-158

An effective method for preparing poly(3-hexylthiophene) (P3HT) coated graphene oxide (GO), (P-GO), based on an ethanol mediated mixing and solvent evaporation method is described. P-GO exhibits good dispersibility in the non-polar solvent o-dichlorobenzene (DCB) allowing the preparation of polymer blend composites. P-GO was doped into P3HT: PCBM blends by solution mixing and shown to facilitate phase...

article

Performance Enhancement in Polymer-Based Organic Optoelectronic Devices Enabled By Discontinuous Metal Interlayer

Peng-Qing Bi, Fei Zheng, Han-Dong Jin, Wei-long Xu, more

IEEE Journal of Photovoltaics > 2016 > 6 > 6 > 1522 - 1529

To realize substantial performance enhancement in the poly (3-hexylthiophene)/[6, 6]-pheny-C71-butyric acid methyl ester (P3HT/PC₇₁BM)-based organic optoelectronic devices, a discontinuous layer consisting of nickel nanoparticles (Ni NPs) was introduced to embellish the indium tin oxide electrode. When the Ni layer with a thickness of 3 nm was introduced, photocurrent gain was enhanced nearly 300%...

article

Charge transfer dynamics in poly(3-hexylthiophene): nanodiamond blend films

Wei-Long Xu, Fei Zheng, Xiao-Yu Yang, Han-Dong Jin, more

Diamond and Related Materials > 2016 > 64 > C > 8-12

The introduction of nanodiamond (ND) into regioregular poly(3-hexylthiophene) (P3HT) can vary the conformational structure of the polymer. The microstructure of the blend films was analyzed by various techniques, such as absorption spectra, Raman spectra and X-ray diffraction. It is shown that the presence of ND improves the crystallinity and increases the effective conjugation length of P3HT in the...

article

Optimization of waveguide structures for beam splitters fabricated in fused silica by direct femtosecond-laser inscription

Wei-Hao Yuan, Jin-Man Lv, Xiao-Tao Hao, Feng Chen

Optics and Laser Technology > 2015 > 74 > Complete > 60-64

The Type-I waveguides fabricated by femtosecond laser inscription were reported in fused silica. Optimization of waveguide structures was conducted for fabricating 1×2 and 1×4 beam splitters. The change of the refractive index between femtosecond laser modified area and unmodified area was estimated to be 9×10⁻⁴. The minimum loss of the waveguides measured with the He–Ne laser at the wavelength of...

article

Waveguides and proportional beam splitters in bulk poly(methyl methacrylate) produced by direct femtosecond-laser inscription

Wei-Hao Yuan, Jin-Man Lv, Chen Cheng, Xiao-Tao Hao, more

Optical Materials > 2015 > 49 > C > 110-115

Waveguides fabricated by direct femtosecond-laser inscription were reported in bulk poly(methyl methacrylate) (PMMA). Optimization of waveguide structures was conducted and 1×2 beam splitters with equal and proportional splitting ratio were fabricated. Three-dimensional structures of 1×4 beam splitters were also achieved based on 1×2 beam splitters. The largest change of the refractive index between...

article

Homogeneous phase separation in polymer:fullerene bulk heterojunction organic solar cells

Wei-Long Xu, Bo Wu, Fei Zheng, Hua-Bin Wang, more

Organic Electronics > 2015 > 25 > Complete > 266-274

Phase separation in donor/acceptor bulk heterojunction (BHJ) significantly affects the exciton dissociation and charge collection in organic solar cells (OSCs). In this work, the dynamics of phase separation in poly[[4,8-bis[(2-ethylhexyl)oxy] benzo[1,2-b:4,5-b′] dithiophene-2,6-diyl] [3-fluoro-2-[(2-ethylhexyl) carbonyl] thieno [3,4-b] thiophenediyl]] (PTB7):[6,6]-phenyl C71 butyric acid methyl ester...

article

Quantifying phase separation and interfacial area in organic photovoltaic bulk heterojunction processed with solvent additives

Wei-Long Xu, Fei Zheng, Jia-Li He, Meng-Qi Zhu, more

Chemical Physics > 2015 > 457 > C > 7-12

“Solvent additives” process is a simple and efficient way to achieve high power conversion efficiency in bulk heterojunction organic solar cells. The morphology measurements at the nanoscale confirm that the addition of solvent additives may promote the 3′H-Cyclopropa[8,25] [5,6] fullerene-C70-D5h(6)-3′ -butanoicacid, 3′-phenyl-, methyl ester (PCBM) aggregation in poly(3-hexylthiophene-2,5-diyl) (P3HT:...

article

Spatial Fluorescence Inhomogeneities in Light-Emitting Conjugated Polymer Films

Xiao-Tao Hao, Lachlan J. McKimmie, Trevor A. Smith

The Journal of Physical Chemistry Letters > 2011 > 2 > 13 > 1520 - 1525

article

Conformational and Photophysical Changes in Conjugated Polymers Exposed to Couette Shear

Nikko Y. Chan, Xiao-Tao Hao, Trevor A. Smith, Dave E. Dunstan

The Journal of Physical Chemistry B > 2011 > 115 > 21 > 6838 - 6842

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ORGANIC SOLAR CELLS (6)
PHOTOLUMINESCENCE (4)
[PHYSICAL ASTRONOMY CLASSIFICATION SCHEME] 74.25.GZ (4)
[PHYSICAL ASTRONOMY CLASSIFICATION SCHEME] 78.55.CR (4)
GAN FILMS (3)
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[PHYSICAL ASTRONOMY CLASSIFICATION SCHEME] 68.55.-A (3)
ALLOY‐LIKE MODEL (2)
ANNEALING (2)
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ENERGY LOSS (2)
FEMTOSECOND LASER INSCRIPTION (2)
FILL FACTOR (2)
MID-BAND GAP (2)
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NON‐FULLERENE ACCEPTORS (2)
NON‐RADIATIVE DEFECT TRAPPING (2)
OPTICAL WAVEGUIDES (2)
ORGANIC SUBSTRATE (2)
R.F. MAGNETRON SPUTTERING (2)
RECOMBINATION (2)
[PHYSICAL ASTRONOMY CLASSIFICATION SCHEME] 68.55.GI (2)
[PHYSICAL ASTRONOMY CLASSIFICATION SCHEME] 73.60.CS (2)
[PHYSICAL ASTRONOMY CLASSIFICATION SCHEME] 78.30.FS (2)
AL-DOPED ZINC OXIDE FILMS (1)
ALL‐POLYMER SOLAR CELLS (1)
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ALUMINUM DOPED ZINC OXIDE FILM (1)
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INFONA - science communication portal

Search results for: Xiao-Tao Hao

π–π Stacking Modulation via Polymer Adsorption for Elongated Exciton Diffusion in High‐Efficiency Thick‐Film Organic Solar Cells

Achieving High Fill Factor in Organic Photovoltaic Cells by Tuning Molecular Electrostatic Potential Fluctuation

Achieving High Fill Factor in Organic Photovoltaic Cells by Tuning Molecular Electrostatic Potential Fluctuation

Efficient Ultrathin Self‐Powered Organic Photodetector with Reduced Exciton Binding Energy and Auxiliary Föster Resonance Energy Transfer Processes

Ternary‐Assisted Sequential Solution Deposition Enables Efficient All‐Polymer Solar Cells with Tailored Vertical‐Phase Distribution

Non‐Fullerene Acceptors: Suppressing Kinetic Aggregation of Non‐Fullerene Acceptor via Versatile Alloy States Enables High‐Efficiency and Stable Ternary Polymer Solar Cells (Adv. Funct. Mater. 20/2021)

Suppressing Kinetic Aggregation of Non‐Fullerene Acceptor via Versatile Alloy States Enables High‐Efficiency and Stable Ternary Polymer Solar Cells

Modification of Hole Transport Layers for Fabricating High Performance Non‐fullerene Polymer Solar Cells

Systematic control of optical features in aluminosilicate glass waveguides using direct femtosecond laser writing

Laser-induced crystallization and conformation control of poly(3-hexylthiophene) for improving the performance of organic solar cells

Aqueous self-assembled perovskite microfibers for sensitive photodetectors

Poly(3-hexylthiophene) coated graphene oxide for improved performance of bulk heterojunction polymer solar cells

Performance Enhancement in Polymer-Based Organic Optoelectronic Devices Enabled By Discontinuous Metal Interlayer

Charge transfer dynamics in poly(3-hexylthiophene): nanodiamond blend films

Optimization of waveguide structures for beam splitters fabricated in fused silica by direct femtosecond-laser inscription

Waveguides and proportional beam splitters in bulk poly(methyl methacrylate) produced by direct femtosecond-laser inscription

Homogeneous phase separation in polymer:fullerene bulk heterojunction organic solar cells

Quantifying phase separation and interfacial area in organic photovoltaic bulk heterojunction processed with solvent additives

Spatial Fluorescence Inhomogeneities in Light-Emitting Conjugated Polymer Films

Conformational and Photophysical Changes in Conjugated Polymers Exposed to Couette Shear

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