A5034431427- Perovskite Materials and Applications
- TiO2 Photocatalysis and Solar Cells
- Advanced Photocatalysis Techniques
- Conducting polymers and applications
- Porphyrin and Phthalocyanine Chemistry
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Advanced Chemical Physics Studies
- Photochemistry and Electron Transfer Studies
- Organic Electronics and Photovoltaics
- Organic Light-Emitting Diodes Research
- Solid-state spectroscopy and crystallography
- Luminescence and Fluorescent Materials
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Spectroscopy and Quantum Chemical Studies
- Atmospheric chemistry and aerosols
- Photoreceptor and optogenetics research
- Photochromic and Fluorescence Chemistry
- Electrochemical sensors and biosensors
- Catalytic Processes in Materials Science
- Advanced Nanomaterials in Catalysis
- Mass Spectrometry Techniques and Applications
- Advanced battery technologies research
- Advanced Combustion Engine Technologies
National Yang Ming Chiao Tung University
2016-2025
Bridge University
2023
Hokkaido University
2023
National Taiwan University
2023
National Taipei University of Technology
2023
University of Warwick
2023
Academia Sinica
2023
Chang Gung University
2023
RIKEN Center for Emergent Matter Science
2018-2019
National Hsinchu University of Education
2018
Simultaneous modification of the dye and redox shuttle boosts efficiency a dye-sensitized solar cell.
To dye for: A porphyrin chromophore, which is integrated into a donor–acceptor as π-conjugated bridge (see picture), exhibits an unprecedented efficiency of 11 % when used photosensitizer in double-layer TiO2 film. greatly enhanced photovoltaic performance observed the cosensitized with metal-free that has complementary spectral response.
The stability of a tin-based perovskite solar cell is major challenge. Here, hybrid cells in new series that incorporate nonpolar organic cation, guanidinium (GA+ ), varied proportions into the formamidinium (FA+ ) tin triiodide (FASnI3 crystal structure presence 1% ethylenediammonium diiodide (EDAI2 as an additive, are reported. device performance optimized at precursor ratio (GAI:FAI) 20:80 to attain power conversion efficiency (PCE) 8.5% when prepared freshly; efficiencies continuously...
Ethylenediammonium diiodide (EDAI<sub>2</sub>) served as an effective additive for tin-based perovskite solar cells to attain a power conversion efficiency approaching 9%.
In this article, we present a new paradigm for organometallic hybrid perovskite solar cell using NiO inorganic metal oxide nanocrystalline as p-type electrode material and realized the first mesoscopic NiO/perovskite/[6,6]-phenyl C61-butyric acid methyl ester (PC61BM) heterojunction photovoltaic device. The photo-induced transient absorption spectroscopy results verified that architecture is an effective sensitized junction, which p-type, contact perovskite-based cell. Power conversion...
Abstract Novel meso ‐ or β‐derivatized porphyrins with a carboxyl group have been designed and synthesized for use as sensitizers in dye‐sensitized solar cells (DSSCs). The position nature of bridge connecting the porphyrin ring carboxylic acid show significant influences on spectral, electrochemical, photovoltaic properties these sensitizers. Absorption spectra phenylethynyl that both Soret Q bands are red‐shifted respect to those 6 . This phenomenon is more pronounced 3 4 , which...
Ag, Au, Pt prove best metal-contacts for perovskite solar cells. Ag and Cu are chemically unstable. Ni Cr show low performance.
We designed highly efficient porphyrin sensitizers with two phenyl groups at meso-positions of the macrocycle bearing ortho-substituted long alkoxyl chains for dye-sensitized solar cells; devices exhibit significantly enhanced photovoltaic performances best porphyrin, LD14, showing JSC = 19.167 mA cm−2, VOC 0.736 V, FF 0.711, and overall power conversion efficiency η 10.17%.
We report here a series of nontoxic and stable bismuth-based perovskite nanocrystals (PeNCs) with applications for photocatalytic reduction carbon dioxide to methane monoxide. Three PeNCs general chemical formulas A3Bi2I9, in which cation A+ = Rb+ or Cs+ CH3NH3+ (MA+), were synthesized novel ultrasonication top-down method. PeNC Cs3Bi2I9 had the best activity CO2 at gas-solid interface formation yields 14.9 μmol g-1 77.6 CO, representing much more effective catalyst than TiO2 (P25) under...
A series of porphyrins bearing alkoxyl and/or alkyl chains were prepared to investigate the roles alkoxyl/alkyl in enhanced photovoltaic performance dyes. Based on experimental results and molecular simulations, we demonstrated that suitable long are capable wrapping porphyrin core, thus resulting decreased dye aggregation, elevated excited states LUMOs, improved performance.
This Perspective reviews the developments of tin-based perovskite solar cells (PSCs) during period 2014–2019 based on two organic cations (methylammonium vs formamidinium) and device architectures (normal inverted) with strategies using cocations coadditives. Unlike their lead-based analogues, PSCs suffer from problems Sn2+/Sn4+ oxidation film formation. The current best cell is an inverted planar FASnI3 guanidinium as cocation, SnF2 additive, ethylenediammonium iodide coadditive, which...
To solve the toxic issue for new-generation photovoltaic applications, tin-based perovskite solar cells are a promising alternative to their lead counterparts, but they suffer from poor stability because of tendency exhibit tin oxidation. Herein we report new sequential method deposition based on solution processing using hexafluoro-2-propanol as solvent deposit eight bulky ammonium cations top 3D layer form 3D/quasi-2D protect grains penetration by moisture. The formation 2D was confirmed...
Abstract Near infrared energy remains untapped toward the maneuvering of entire solar spectrum harvesting for fulfilling nuts and bolts hydrogen production. We report use Au@Cu 7 S 4 yolk@shell nanocrystals as dual-plasmonic photocatalysts to achieve remarkable production under visible near illumination. Ultrafast spectroscopic data reveal prevalence long-lived charge separation states both excitation. Combined with advantageous features nanostructures, achieves a peak quantum yield 9.4% at...
Abstract Four X‐shaped quinoxaline‐based organic dyes, PQx (1), TQx, (2), PQxD (3), and TQxD (4) (D = dye sensitizers) are developed served as p ‐type self‐assemble monolayer (SAM) for tin perovskite solar cells (TPSC). Thermal, optical, electrochemical properties of these SAMs thoroughly investigated characterized. Tin layers successfully deposited on four SAM surfaces according to a two‐step approach the devices exhibit power conversion efficiency in order (8.3%) > TQx (8.0%) (7.1%)...
A new set of pyrrolopyrrole-based (PPr) polymers incorporated with thioalkylated/alkylated bithiophene (SBT/BT) is synthesized and explored as hole-transporting materials (HTMs) for Sn-based perovskite solar cells (TPSCs). Three bithiophenyl spacers bearing the thioalkylated hexyl (SBT-6), tetradecyl (SBT-14), (BT-14) chains are utilized to examine effect alkyl chain lengths. Among them, TPSCs fabricated using PPr-SBT-14 HTMs through a two-step approach by attaining power conversion...
Abstract A novel blue‐emitting material, 2‐ tert ‐butyl‐9,10‐bis[4‐(1,2,2‐triphenylvinyl)phenyl]anthracene ( TPVAn ), which contains an anthracene core and two tetraphenylethylene end‐capped groups, has been synthesized characterized. Owing to the presence of its sterically congested terminal possesses a high glass transition temperature (155 °C) is morphologically stable. Organic light‐emitting diodes (OLEDs) utilizing as emitter exhibit bright saturated‐blue emissions (Commission...
A series of porphyrin dyes with an electron-donating group (EDG) attached at a meso-position (YD1–YD8) have been designed and synthesized for use as sensitizers in dye-sensitized solar cells (DSSC). The nature the EDG exerts significant influence on spectral, electrochemical photovoltaic properties these sensitizers. Absorption spectra porphyrins having amino show broadened Soret band red-shifted Q bands respect to those reference YD0. This phenomenon is more pronounced YD7 YD8 that...
The rotation-inversion controversy for the photoisomerization mechanism of azobenzene has been addressed on basis CASSCF calculations excited-state relaxed surface scan along CNN bending (inversion), CNNC torsion (rotation), and concerted (concerted inversion) reaction pathways. According to our calculated results, inversion channel involves a substantial energy barrier large S0−S1 gap so that it is highly unfavorable be considered an efficient electronic relaxation. rotation essentially...
Measurements of anisotropy femtosecond fluorescence after direct excitation the S1(n,pi*) state azobenzene in hexane and ethylene glycol solutions have been carried out to address controversy about inversion rotation mechanism photoisomerization. The observed anisotropies decay a nonzero asymptotic level with relaxation period same as that for slow corresponding biexponential transient; this effect is attributed involvement out-of-plane CNNC-torsional motion on approach twisted conical...
We report the photovoltaic performances and kinetics of femtosecond fluorescence for three zinc-porphyrin sensitizers (YD0−YD2) coadsorbed with chenodeoxycholic acid (CDCA) at molar ratios on nanocrystalline semiconductor (TiO2 or Al2O3) films. The addition CDCA improved efficiencies YD0 YD1 so that their maximum performance occurred a dye/CDCA ratio 1:2, but presence had negative effect YD2. Porphyrin aggregation TiO2 surfaces not only accelerates rate intermolecular energy transfer also...
[reaction: see text] A series of carbazole/fluorene (CBZm-Fn) hybrids were effectively synthesized through Friedel-Crafts-type substitution the carbazole rings. These compounds thermally and morphologically stable host materials for OLED applications. Efficient blue phosphorescent OLEDs obtained when employing CBZ1-F2 as FIrpic guest.
We designed a stepwise approach for co-sensitization of zinc porphyrin sensitizer (LD12) with spirally configured organic dye (CD5) dye-sensitized solar cells. The co-sensitized LD12 + CD5 device showed significantly enhanced VOC and JSC relative to its individual single-dye sensitized devices. Upon optimization, the made system yielded JSC/mA cm−2 = 16.7, VOC/V 0.74, FF 0.73 η 9.0%; this performance is superior that either from (η 7.5%) 5.7%) under same conditions fabrication. To understand...
With a reprecipitation method, we prepared fluorescent organic nanoparticles of 1,4-di[(E)-2-phenyl-1-propenyl]benzene (PPB) that feature weak emission in solution but exhibit blue-shifted absorption and strong as aggregates. Picosecond transients these PPB showed biexponential decay, described with consecutive kinetic model involving two emissive states. X-ray diffraction patterns nanocrystals indicate long-range packing structures types, one the same single crystal other not yet...