K. M. Yu
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View article: Simulation of a Multiband Stacked Antiparallel Solar Cell with over 70% Efficiency
Simulation of a Multiband Stacked Antiparallel Solar Cell with over 70% Efficiency Open
Multiband solar cells offer a promising route to surpass the Shockley-Queisser limit by harnessing sub-bandgap photons through three active energy band transitions. However, realizing their full potential requires overcoming key challenges…
View article: Correlations Between Skeletal Patterns, Lips, And Maxilla In Children
Correlations Between Skeletal Patterns, Lips, And Maxilla In Children Open
Aim or purpose: Mouth breathing is common in children with a multifactorial etiology. Repeated upper airway obstruction may cause pediatric obstructive sleep apnea. Altered vertical facial growth is linked to both obstructive and habitual …
View article: Optoelectronic properties and application of <i>p</i>-type ultrawide bandgap Zn0.7Ni0.3O1+δ thin films in p–n heterojunction diodes
Optoelectronic properties and application of <i>p</i>-type ultrawide bandgap Zn0.7Ni0.3O1+δ thin films in p–n heterojunction diodes Open
p-type ultrawide bandgap oxide semiconductors play a crucial role in developing optoelectronic and electronic devices. Our previous studies have identified rock salt-structured Zn1−xNixO (∼0.27 ≤ x ≤ 1) alloys as promising wide bandgap oxi…
View article: Tailoring epsilon-near-zero wavelength and nonlinear absorption properties of CdO thin films by Mo doping
Tailoring epsilon-near-zero wavelength and nonlinear absorption properties of CdO thin films by Mo doping Open
Cadmium oxide (CdO) has recently attracted attention as a material with controllable properties tailored for optoelectronic and nanophotonic devices due to its superior mobility. However, its potential application in near-infrared (NIR) re…
View article: Resonant transition metal Ti or Ta doping in high mobility transparent conducting CdO: The effects of doping concentration
Resonant transition metal Ti or Ta doping in high mobility transparent conducting CdO: The effects of doping concentration Open
Recent studies have shown that transparent conducting oxides (TCOs) such as In2O3 or SnO2 exhibited enhanced mobility through resonant transition metal (TM) doping. However, our previous investigations of CdO, another TCO, doped with TM el…
View article: Mask-inspired moisture-transmitting and durable thermochromic perovskite smart windows
Mask-inspired moisture-transmitting and durable thermochromic perovskite smart windows Open
Thermochromic perovskite smart windows (TPWs) are a cutting-edge energy-efficient window technology. However, like most perovskite-based devices, humidity-related degradation limits their widespread application. Herein, inspired by the str…
View article: Overcoming the doping limit in GaAs by ion implantation and pulsed laser melting
Overcoming the doping limit in GaAs by ion implantation and pulsed laser melting Open
Most semiconductors exhibit a saturation of free carriers when heavily doped with extrinsic dopants. This carrier saturation or “doping limit” is known to be related to the formation of native compensating defects, which, in turn, depends …
View article: Defect-dependent environmental stability of high mobility transparent conducting In-doped CdO
Defect-dependent environmental stability of high mobility transparent conducting In-doped CdO Open
Highly degenerate n-type CdO with high electron mobility is a promising transparent conducting oxide (TCO) for optoelectronic devices utilizing a spectrum in the Vis-NIR range. In particular, it has been shown that doped CdO thin films can…
View article: Quaternary CsPbX<sub>3</sub> (X = Cl<sub>1−<i>x</i></sub>Br<sub><i>x</i></sub>, Br<sub>1−<i>x</i></sub>I<sub><i>x</i></sub>) alloy microplates synthesized by single-step chemical vapor deposition and their two-photon absorption (TPA) properties
Quaternary CsPbX<sub>3</sub> (X = Cl<sub>1−<i>x</i></sub>Br<sub><i>x</i></sub>, Br<sub>1−<i>x</i></sub>I<sub><i>x</i></sub>) alloy microplates synthesized by single-step chemical vapor deposition and their two-photon absorption (TPA) properties Open
Because of their well-defined light–matter interaction volume, high-quality single-crystalline nature, and precise bandgap tunability, all-inorganic cesium lead halide (CsPbX 3 (X = Cl, Br, I)) perovskite (IHP) microplates are of fundament…
View article: Sonochemical Coating of Textiles with Zinc Oxide: Robust, Silver-Seeded Growth on Cotton for Effective UV Shielding
Sonochemical Coating of Textiles with Zinc Oxide: Robust, Silver-Seeded Growth on Cotton for Effective UV Shielding Open
We report on the in situ silver-seeded generation and growth of pure wurtzite zinc oxide (ZnO) onto woven cotton fabric substrates via sonochemical deposition. Coating leaching issues and limitations related to processing temperature often…
View article: Transition metal elements as donor dopants in CdO
Transition metal elements as donor dopants in CdO Open
CdO has been shown to achieve a high electron concentration N (>1021cm-3) and at the same time a high mobility μ (>100cm2/Vs) when doped with conventional shallow dopants (In or Ga), and consequently making it a transparent conductin…
View article: Multiband semiconductor compositions for photovoltaic devices
Multiband semiconductor compositions for photovoltaic devices Open
The highly mismatched alloy Zn.sub.1-yMn.sub.yO.sub.xTe.sub.1-x, 0.ltoreq.y<1 and 0<x<1 and other Group II-IV-Oxygen implanted alloys have been synthesized using the combination of oxygen ion implantation and pulsed laser melting. Incorpor…
View article: Co-implantation of group VI elements and N for formation of non-alloyed ohmic contacts for n-type semiconductors
Co-implantation of group VI elements and N for formation of non-alloyed ohmic contacts for n-type semiconductors Open
Non-alloyed, low resistivity contacts for semiconductors using Group III-V and Group II-VI compounds and methods of making are disclosed. Co-implantation techniques are disclosed.
View article: Two‐Step Magnetic‐Pulling Chemical Vapor Deposition Growth of CdS<sub>1−<i>x</i></sub>Se<sub><i>x</i></sub> Lateral Nanoribbon Heterostructures for High‐Performance Photodetectors
Two‐Step Magnetic‐Pulling Chemical Vapor Deposition Growth of CdS<sub>1−<i>x</i></sub>Se<sub><i>x</i></sub> Lateral Nanoribbon Heterostructures for High‐Performance Photodetectors Open
Bandgap integration in a single semiconductor nanostructure is an important task for their applications in photonics and photoelectronics. Herein a two‐step growth of CdS x Se 1− x alloy nanoribbon heterostructures along the lateral direct…
View article: Improvement of III-V dilute nitride thin films for solar cell application: Effect of antimony doping
Improvement of III-V dilute nitride thin films for solar cell application: Effect of antimony doping Open
Highly mismatched alloys such as GaNAs demonstrate exotic electronic properties such as the splitting of the conduction bands (CB) into E- and E+ sub-bands, and make them promising for novel application. However, the incorporation of nitro…
View article: Controlling electrical and optical properties of wurtzite Cd<i>x</i>Zn1<i>−x</i>O with high Cd contents via native defects manipulation by low-temperature annealing
Controlling electrical and optical properties of wurtzite Cd<i>x</i>Zn1<i>−x</i>O with high Cd contents via native defects manipulation by low-temperature annealing Open
Bandgap energies in wurtzite (WZ) structured CdxZn1−xO alloys are known to decrease with increasing Cd content (x). Our previous work demonstrated that WZ-CdxZn1−xO alloys with a high Cd content of x ∼ 0.6 and a low gap of 2 eV can be stab…
View article: Near‐Infrared‐Activated Thermochromic Perovskite Smart Windows (Adv. Sci. 14/2022)
Near‐Infrared‐Activated Thermochromic Perovskite Smart Windows (Adv. Sci. 14/2022) Open
Smart Windows In article number 2106090 by Sai Liu, Chi Yan Tso, and co‐workers, a self‐activated thermochromic perovskite smart window is developed. This window demonstrates a passive color‐switch ability between cold and hot weathers. No…
View article: Near‐Infrared‐Activated Thermochromic Perovskite Smart Windows
Near‐Infrared‐Activated Thermochromic Perovskite Smart Windows Open
Perovskite‐based thermochromic smart windows that can change color have attracted much interest. However, the high transition temperature (>45 °C in air) hinders their practical application. Herein, a near‐infrared (NIR) activated thermoch…
View article: Formation of Vitrified Solid Solution Enables Simultaneously Efficient and Stable Organic Solar Cells
Formation of Vitrified Solid Solution Enables Simultaneously Efficient and Stable Organic Solar Cells Open
Employing a ternary blend as absorber is an ingenious tactic to achieve broad spectral coverage in single-junction organic photovoltaics. The incorporation of a second acceptor with relatively lower electron affinity (EA) is important for …