A5074961443- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Perovskite Materials and Applications
- Organic Light-Emitting Diodes Research
- Luminescence Properties of Advanced Materials
- Quantum Dots Synthesis And Properties
- Radiation Detection and Scintillator Technologies
- Chalcogenide Semiconductor Thin Films
- Microwave Dielectric Ceramics Synthesis
- Advanced Photocatalysis Techniques
- Semiconductor materials and interfaces
- Gas Sensing Nanomaterials and Sensors
- Ammonia Synthesis and Nitrogen Reduction
- Luminescence and Fluorescent Materials
- Nuclear materials and radiation effects
- Molecular Junctions and Nanostructures
- Solid-state spectroscopy and crystallography
- Glass properties and applications
- Thin-Film Transistor Technologies
- Synthesis and properties of polymers
- 2D Materials and Applications
- Fullerene Chemistry and Applications
- Nanowire Synthesis and Applications
- Ferroelectric and Piezoelectric Materials
- Crystal Structures and Properties
Pukyong National University
2016-2025
University of California, Santa Barbara
2009-2025
Pusan National University
2007-2022
Government of the Republic of Korea
2015-2020
Busan Medical Center
2014-2019
Global Frontier Hybrid Interface Materials
2018-2019
Interface (United States)
2019
Gwangju Institute of Science and Technology
2007-2011
LG (United States)
2008
Abstract Herein, the self‐reduction behavior of manganese (Mn) in Mg 2 SnO 4 (MSO) host lattices prepared by using solid‐state reaction technique air atmosphere is reported. Excited 282 nm, only emission Mn 2+ seen, and observed results are confirmed theoretical calculation based on density functional theory. Noteworthy, with codoping Li + , process suppressed, leading to coexistence 4+ MSO along multicolor emissions. For suppressed behavior, possible hypotheses proposed elucidate...
The thermal stability of the poly(2,7-carbazole) derivative (PCDTBT) is investigated. UV–visible absorption spectra and X-ray photoelectron spectroscopy data demonstrate that electronic structure PCDTBT stable in air at annealing temperatures up to 150 °C N2 even after exposure 350 °C. Field-effect transistors fabricated with show characteristics hole mobility (air) (N2). Detailed facts importance specialist readers are published as "Supporting Information". Such documents peer-reviewed, but...
The use of a layer titanium suboxide (TiOx) between the bulk heterojunction (BHJ) thin film and metal contact in “plastic” solar cell has been shown to increase both short-circuit current fill factor. Using combination optical modeling device experiments, we clarify role TiOx as an spacer. For appropriate choice BHJ thickness composition, can enhance absorption within active layer, thereby increasing photocurrent power conversion efficiency.
Dual-mode excitation properties were introduced in Sm3+ doped Sr2CaMoO6 prepared by a high temperature solid state reaction technique. Two ways are available to generate white light the single-component phosphor activated ions. Warm can be obtained from Sr1.995Sm0.005CaMoO6 pumped 380 or 411 nm energy. The full visible spectral emission of single-phase comes and low level lines ions as well intrinsic luminescence MoO6 group. It is also competitive yellow-emitting for blue LEDs gives three...
We report the origin of strong UV-irradiation dependence, generally known as a “light-soaking” process, in inverted polymer solar cells (I-PSCs) using interface an sol-gel processed titanium sub-oxide (TiOx) and indium tin oxide (ITO) cathode. When I-PSCs incorporating TiOx electron-selecting layer were fabricated, as-prepared devices exhibited anomalous J-V curve with kink shape, resulting extremely low efficiency. However, shape disappeared after white light irradiation for considerable...
High intensity and high sensitivity properties indicate that NaLaMgWO<sub>6</sub>:Er<sup>3+</sup> phosphors have great potential for use in solid-state lighting optical temperature sensors.
Abstract Semiconducting lead halide perovskite nanocrystals (PNCs) are regarded as promising candidates for next‐generation optoelectronic devices due to their solution processability and outstanding properties. While the field of light‐emitting diodes (LEDs) photovoltaics (PVs), two prime examples devices, has recently seen a multitude efforts toward high‐performance PNC‐based realizing both with high efficiencies stabilities through single PNC processing strategy remained challenge. In...
Abstract Manganese (Mn) doped MgGa 2 O 4 (MGO) phosphors are prepared by a solid‐state reaction technique in air. Upon UV light excitation, the featured green and red emissions of Mn 2+ 4+ , respectively, detected Mn‐doped MGO phosphors, indicating incomplete self‐reduction behavior host lattices. To clarify behavior, theoretical calculations based on density functional theory bond energy performed. Moreover, can be manipulated incorporation Li + leading to precise regulation contents Based...
Although significant progress has been made in the development of green, red, and near-infrared perovskite light-emitting diodes (PeLEDs), blue PeLEDs exhibit inferior performance, owing to various defects poor carrier injection solution-processed films. Thus, this study incorporates dual-passivation additive diphenylphosphinamide (DPPA) into films, through density functional theory calculations experimental characterizations, DPPA proven be an effective passivator. Its phosphine oxide group...
Abstract Perovskite solar cells (PeSCs) using FAPbI 3 perovskite films often exhibit unfavorable phase transitions and defect‐induced nonradiative interfacial recombination, resulting in considerable energy loss impairing the performance of PeSCs terms efficiency, stability, hysteresis. In this work, a facile interface engineering strategy to control surface structure energy‐level alignment by tailoring between film hole‐transporting layer 4‐hydroxypicolinic acid (4HPA) is reported....
Improving the interface characteristics between hole-transport layer (HTL) and perovskite absorber is crucial for achieving maximum efficiency in inverted solar cells (PSCs). This paper presents an effective functional compensation (FCL) composed of benzothiophene derivatives, particularly 5-(trifluoromethyl)-1-benzothiophene-2-carboxylic acid (TFMBTA); this introduced MeO-2PACz HTL to improve interfacial them. FCL improves charge transfer, hole extraction, deposition by improving surface...
Sensing from the ultraviolet-visible to infrared is critical for a variety of industrial and scientific applications. Photodetectors with broad spectral response, 300 nm 1,100 nm, were fabricated using narrow-band gap semiconducting polymer blended fullerene derivative. By both an electron-blocking layer hole-blocking layer, photodetectors, operating at room temperature, exhibited calculated detectivities greater than 1013 cm Hz1/2/W over entire range linear dynamic approximately 130 dB. The...
Abstract A new film‐casting method for polymer electrodes is reported, in which thickness‐controlled drop‐casting (TCDC), using polyaniline doped with camphorsulfonic acid (PANI:CSA) used. By combining the advantages of conventional spin‐casting and methods, by rigorously controlling film formation parameters, flexible high conductivity excellent transmittance can be produced. The PANI:CSA cast TCDC exhibited constant thickness‐independent conductivities ∼600 S cm −1 down to a thickness 0.2...