Hyun M. Jang
YOU?
Author Swipe
View article: Exciton Bohr radius of lead halide perovskites for photovoltaic and light-emitting applications
Exciton Bohr radius of lead halide perovskites for photovoltaic and light-emitting applications Open
Exciton Bohr radius (a_B) and exciton binding energy (E_b) of metal halide perovskites are two prime quantities in their applications to both light-emitting diode displays and photovoltaic devices. We develop a reliable theoretical method …
View article: Semi-empirical approach to assess externally-induced photoluminescence linewidth broadening of halide perovskite nanocrystals with particle-size distribution
Semi-empirical approach to assess externally-induced photoluminescence linewidth broadening of halide perovskite nanocrystals with particle-size distribution Open
Colloidal nanocrystals (NCs) can be used to prepare high-color-purity metal halide perovskites (MHPs) for light-emitting displays. However, the NCs have a finite particle-size distribution, which broadens the linewidth of photoluminescence…
View article: Proton-transfer-induced 3D/2D hybrid perovskites suppress ion migration and reduce luminance overshoot
Proton-transfer-induced 3D/2D hybrid perovskites suppress ion migration and reduce luminance overshoot Open
View article: Enhancing photoluminescence quantum efficiency of metal halide perovskites by examining luminescence-limiting factors
Enhancing photoluminescence quantum efficiency of metal halide perovskites by examining luminescence-limiting factors Open
Metal halide perovskites (MHPs) show superior optoelectronic properties, which give them the great potential for use in next generation light-emitting diodes (LEDs). In particular, their narrow emission linewidths can achieve ultrahigh col…
View article: Author Correction: Lattice strain-enhanced exsolution of nanoparticles in thin films
Author Correction: Lattice strain-enhanced exsolution of nanoparticles in thin films Open
View article: Lattice strain-enhanced exsolution of nanoparticles in thin films
Lattice strain-enhanced exsolution of nanoparticles in thin films Open
View article: High Rate Li-Ion Batteries with Cation-Disordered Cathodes
High Rate Li-Ion Batteries with Cation-Disordered Cathodes Open
View article: Electron−hole separation in ferroelectric oxides for efficient photovoltaic responses
Electron−hole separation in ferroelectric oxides for efficient photovoltaic responses Open
Significance Photovoltaics (PVs) benefitting from ferroelectric polarizations can overcome critical limitations of conventional type PVs. In this class, Bi 2 FeCrO 6 is known to be the best-performing material; however, a fundamental under…
View article: Giant magnetoelastic spin-flop with magnetocrystalline instability in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="normal">La</mml:mi><mml:mrow><mml:mn>1.4</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi mathvariant="normal">Sr</mml:mi><mml:mrow><mml:mn>1.6</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi mathvariant="normal">Mn</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>7</mml:mn></mml:msub></mml:math>
Giant magnetoelastic spin-flop with magnetocrystalline instability in Open
We studied a low-field giant magnetostrictive spin-flop transition in a colossal magnetoresistance manganite La1.4Sr1.6Mn2O7 using resonant soft x-ray diffraction and soft x-ray absorption spectroscopy at the Mn L2,3 edge. The spin-flop tr…
View article: Spin-coupling-induced Improper Polarizations and Latent Magnetization in Multiferroic BiFeO3
Spin-coupling-induced Improper Polarizations and Latent Magnetization in Multiferroic BiFeO3 Open
Multiferroic BiFeO 3 (BFO) that exhibits a gigantic off-centering polarization (OCP) is the most extensively studied material among all multiferroics. In addition to this gigantic OCP, the BFO having R3c structural symmetry is expected to …
View article: Switchable Ferroelectric Photovoltaic Effects in Epitaxial Thin Films of h-RFeO3 having Narrow Optical Band Gaps
Switchable Ferroelectric Photovoltaic Effects in Epitaxial Thin Films of h-RFeO3 having Narrow Optical Band Gaps Open
Ferroelectric photovoltaics (FPVs) have drawn much attention owing to their high stability, environmental safety, anomalously high photovoltages, coupled with reversibly switchable photovoltaic responses. However, FPVs suffer from extremel…
View article: Role of polar compensation in interfacial ferromagnetism of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>LaNiO</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:mo>/</mml:mo><mml:msub><mml:mi>CaMnO</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math> superlattices
Role of polar compensation in interfacial ferromagnetism of superlattices Open
Polar compensation can play an important role in the determination of interfacial electronic and magnetic properties in oxide heterostructures. Using x-ray absorption spectroscopy, x-ray magnetic circular dichroism, bulk magnetometry, and …
View article: Influence of tensile-strain-induced oxygen deficiency on metal-insulator transitions in NdNiO3−δ epitaxial thin films
Influence of tensile-strain-induced oxygen deficiency on metal-insulator transitions in NdNiO3−δ epitaxial thin films Open
View article: Hydrogen-doped Brookite TiO2 Nanobullets Array as a Novel Photoanode for Efficient Solar Water Splitting
Hydrogen-doped Brookite TiO2 Nanobullets Array as a Novel Photoanode for Efficient Solar Water Splitting Open
View article: Resolving the Physical Origin of Octahedral Tilting in Halide Perovskites
Resolving the Physical Origin of Octahedral Tilting in Halide Perovskites Open
Hybrid perovskites are currently the fastest growing photovoltaic technology, having reached a solar cell efficiency of over 20%. One possible strategy to further improve the efficiency of perovskite solar cells is to tune the degree of oc…
View article: Anomalous domain periodicity observed in ferroelectric PbTiO3 nanodots having 180° stripe domains
Anomalous domain periodicity observed in ferroelectric PbTiO3 nanodots having 180° stripe domains Open
View article: Modulation of metal-insulator transitions by field-controlled strain in NdNiO3/SrTiO3/PMN-PT (001) heterostructures
Modulation of metal-insulator transitions by field-controlled strain in NdNiO3/SrTiO3/PMN-PT (001) heterostructures Open
View article: The nature of hydrogen-bonding interaction in the prototypic hybrid halide perovskite, tetragonal CH3NH3PbI3
The nature of hydrogen-bonding interaction in the prototypic hybrid halide perovskite, tetragonal CH3NH3PbI3 Open
In spite of the key role of hydrogen bonding in the structural stabilization of the prototypic hybrid halide perovskite, CH 3 NH 3 PbI 3 (MAPbI 3 ), little progress has been made in our in-depth understanding of the hydrogen-bonding intera…
View article: Ferroelectric polarization switching with a remarkably high activation energy in orthorhombic GaFeO3 thin films
Ferroelectric polarization switching with a remarkably high activation energy in orthorhombic GaFeO3 thin films Open
View article: Two Distinct Modes of Hydrogen-Bonding Interaction in the Prototypic Hybrid Halide Perovskite, Tetragonal CH3NH3PbI3
Two Distinct Modes of Hydrogen-Bonding Interaction in the Prototypic Hybrid Halide Perovskite, Tetragonal CH3NH3PbI3 Open
In spite of the key role of hydrogen bonding in the structural stabilization of the prototypic hybrid halide perovskite, CH3NH3PbI3 (MAPbI3), little progress has been made in our in-depth understanding of the hydrogen-bonding interaction b…
View article: Two Distinct Modes of Hydrogen-Bonding Interaction in the Prototypic\n Hybrid Halide Perovskite, Tetragonal CH3NH3PbI3
Two Distinct Modes of Hydrogen-Bonding Interaction in the Prototypic\n Hybrid Halide Perovskite, Tetragonal CH3NH3PbI3 Open
In spite of the key role of hydrogen bonding in the structural stabilization\nof the prototypic hybrid halide perovskite, CH3NH3PbI3 (MAPbI3), little\nprogress has been made in our in-depth understanding of the hydrogen-bonding\ninteractio…
View article: Ferroelectric polarization switching with a remarkably high activation-energy in orthorhombic GaFeO3 thin films
Ferroelectric polarization switching with a remarkably high activation-energy in orthorhombic GaFeO3 thin films Open
Orthorhombic GaFeO3 (o-GFO) with the polar Pna21 space group is a prominent ferrite by virtue of its piezoelectricity and ferrimagnetism, coupled with magneto-electric effects. Herein, we unequivocally demonstrate a large ferroelectric rem…
View article: Modulated spin structure responsible for the magnetic-field-induced polarization switching in multiferroic<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi mathvariant="normal">TbMn</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>5</mml:mn></mml:msub></mml:mrow></mml:math>
Modulated spin structure responsible for the magnetic-field-induced polarization switching in multiferroic Open
Orthorhombic TbMn2O5 (o-TMO) is a well-known multiferroic manganite with the remarkable property of polarization switching at 3 K under a bias magnetic (H) field along the a axis of Pb2(1)m. To theoretically account for this outstanding ob…
View article: Atomic-scale origin of piezoelectricity in wurtzite ZnO
Atomic-scale origin of piezoelectricity in wurtzite ZnO Open
The intra-atomic 3dz2–4pz orbital self-mixing of Zn (ϕm = cdϕ3dz2 + cpϕ4pz with cd > cp) is the electronic origin of the c-axis-oriented pie…