“…Two-dimensional (2D) semiconducting materials are promising building blocks for optoelectronic applications, many of which require efficient dissociation of excitons into free electrons and holes. However, the strongly bound excitons arising from the enhanced Coulomb interaction in these monolayers suppresses the creation of free carriers. …”
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“…In contrast, the fluorescence-like shifts are due primarily to the continuum of particle-hole excitations in the charge channel. Our results show that under the proper experimental conditions RIXS indeed can be used to probe paramagnons in doped high-T(c) cuprate superconductors.…”
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“…Here, we show that, if one allows symmetry-breaking energy-lowering crystal symmetry reductions and electronic instabilities within DFT, one successfully and systematically recovers the trends in the observed band gaps, magnetic moments, type of magnetic and crystallographic ground state, bond disproportionation and ligand hole effects, Mott vs. charge transfer insulator behaviors, and the amplitude of structural deformation modes including Jahn-Teller in low temperature spin-ordered and high temperature disordered paramagnetic phases. …”
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“…The Co(3)O(4)-coated P25 powders exhibit enhanced photocatalytic degradation efficiency of almost 100% for methylene blue in 1.5 h under ultraviolet light, compared with P25 of 80%. The Mott-Schottky plots of photocatalyst powders confirm the p-n heterojunction formation in Co(3)O(4)–TiO(2) nanocomposite materials, which is beneficial to increase the efficiency of photogenerated electron-hole separation. …”
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“…The holes from VB of TiO(2) photogenerated by electrons exciting are consumed by a process in which Cu(2+) is oxidized to Cu(3+) and Cu(4+), and then oxidize water to produce oxygen. …”
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“…In addition, we found that the effective mass of holes is higher than that of electrons, suggesting that these heterostructures can be utilized for hole/electron separation. …”
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“…This study successfully manufactured a p-n heterojunction hematite (α-Fe(2)O(3)) structure with molybdenum disulfide (MoS(2)) to address the electron–hole transfer problems of conventional hematite to enhance photoelectrochemical (PEC) performance. …”
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“…The excitation density required for the lasing behavior, however, is found to exceed the Mott density, excluding the exciton as the excited state. …”
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“…In the vicinity of this magic angle, we predict the realization of a generalized Kane-Mele model with a topological flat band, interaction-driven Haldane insulator, and Mott insulators at the filling of one hole per moiré unit cell. …”
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“…By investigating the transport at the single particle level we demonstrate that the hole mobility in this system is around 40 cm(2)V(−1)s(−1). …”
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“…A band diagram constructed from UV–vis spectral and Mott–Schottky measurements reveals significant band energy shifts in all Cu(2)O samples after decorating with 4-EA. …”
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“…Although the bare particle-based photoanode did not exhibit a noticeable photocurrent, Nb(2)O(5) and CoO(x) overlayers were deposited to extract holes and activate NdTiO(2+x)N(1–x). Multiple electrochemical methods were employed to understand the key features required for this metal oxynitride to fabricate photoanodes.…”
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“…XPS analysis manifests that MoS(x) provides a number of active sites. Mott–Schottky plots show that the conduction band of MoS(x) (−0.18 V vs. …”
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“…By tuning hole carriers, we also find an unexpected phase transition from the superconducting to metallic states at 4%. …”
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“…The detection of radical scavengers confirmed that superoxide radicals, photogenerated holes, and photogenerated electrons were the main active substances for MB degradation. …”
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“…With increasing Cu content, the concentration of hole carriers also increased, leading to a substantial reduction in electrical resistivity. …”
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“…The decrease in photoluminescence intensity for the doped NCs corroborates a reduction in electron–hole recombination. On the Mott–Schottky analysis, the positive slope for ZnO confirms the n-type character, while the negative and positive slopes of the NCs confirm the p- and n-type characters, respectively. …”
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“…The p–n heterojunction Bi(2)S(3)/ZnCo(2)O(4) was characterized by structural, optical, and photochemical properties and the photocatalyst decoloration of indigo carmine. Mott–Schottky plots proved a heterojunction formed between n-Bi(2)S(3) and p-ZnCo(2)O(4). …”
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“…Semiconductor properties are evaluated from the Mott–Schottky measurements, and the charge transfer and transport kinetics of the PEC process are measured from several photoelectrochemical investigations. …”
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“…We explore the impact of different back metal contacts (BMCs), including Cu, Ag, Fe, C, Au, W, Pt, Se, Ni, and Pd combined with the TiO(2) electron transport layer (ETL) and CFTS hole transport layer (HTL), on the performance of the devices. …”
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