Loading...
Blue Emission of α-GaN Colloidal Quantum Dots via Zn Doping
| author | Kwang Seob Jeong |
|---|---|
| Homepage | https://kwangsjeong.wixsite.com/ksjlab-koreauniv |
| journal | Chemistry of Materials, 2019, Article ASAP |
| Attachment '2' |
|---|
Yun Chang Choi(최윤창, 제1저자)
Gallium nitride (GaN) has been of interest due to its enormous potentials for optoelectronic devices. However, it is very interesting that no proper bottom-up chemical synthesis method for GaN quantum dot has been proposed. Here, we first present a new synthetic method for GaN colloidal quantum dots based on the hot-injection technique. Strikingly, it was possible to demonstrate the change in the emission energy of GaN CQDs by adjusting their reaction condition, which directly shows the existence of quantum confinement effects in colloidal GaN CQDs. Furthermore, the ultraviolet emission of colloidal GaN CQDs has been lowered to the blue region by introducing Zn metal impurities, which has never been observed in the colloidal nitride nanocrystal system. The origin of blue emission was studied with time-resolved photoluminescence (TRPL). This GaN CQD study would provide a new perspective on Ⅲ-Ⅴ colloidal nanocrystal system, and basis for optoelectronic applications of colloidal quantum dots.
« Prev Covalently Linked Perylene Diimide–Polydiacetylene Nanofibers...
Covalently Linked Perylene Diimide–Polydiacetylene Nanofibers...
2019.06.07by webmaster
〈
Gas‐phase conformations of intrinsically disordered proteins ... Next »
Gas‐phase conformations of intrinsically disordered proteins ...
2019.05.27by webmaster
〉
-
Read More
Significantly Improved Morphology and Efficiency of Nonhalogenated Solvent-Processed Solar Cells Derived from a Conjugated Donot-Accepteor Block Copolymer
Dong Hoon Choihttp://fpl.korea.ac.kr/A highly crystalline conjugated donor (D)–acceptor (A) block copolymer (PBDT2T‐b ‐N2200) that has good solubility in nonhalogenated solvents is successfully synthesized. PBDT2T‐b ‐N2200 shows a broad complementary absorption behavior ...Date2023.05.03 Bywebmaster2 Views170 -
Read More
Mechanical Force Induces Ylide-Free Cycloaddition of Nonscissible Aziridines
Hyo Jae Yoonhttps://hyojaeyoon.wixsite.com/ommlSangmin Jung Reported herein is that aziridines can be a nonvulnerable mechanophore. Upon exposure to a mechanical force, stereochemically pure nonactivated aziridines incorporated into the backbone of macromolecule do not undergo cis‐trans...Date2020.01.17 Bywebmaster Views532 -
Read More
Bright ligand-activatable fluorescent protein for high-quality multicolor live-cell super-resolution microscopy
Sang-Hee Shimhttps://cmsd.ibs.re.kr/html/cmsd_en/We introduce UnaG as a green-to-dark photoswitching fluorescent protein capable of high-quality super-resolution imaging with photon numbers equivalent to the brightest photoswitchable red protein. UnaG only fluoresces upon binding of a fluo...Date2020.01.17 Bywebmaster Views418 -
Read More
Mid-wavelength Infrared Photoluminescence and Lasing of Tellurium Element Solid and Microcrystals
Kwang Seob Jeonghttps://kwangsjeong.wixsite.com/ksjlab-koreaunivDongsun Choi(제1저자, 통합과정) Tellurium has been of great interest in physics, chemistry, material science, and more recently in nanoscience. However, information on the photoluminescence of Te crystals, crucial in understanding the mater...Date2020.01.17 Bywebmaster Views445 -
Read More
Power Factor of One Molecule Thick Films and Length Dependence
Hyo Jae Yoonhttps://hyojaeyoon.wixsite.com/ommlSohyun Park(제1저자, 통합과정) Seohyun Kang(공동 제1저자, 통합과정) There is a rapidly increasing interest in organic thin film thermoelectrics. However, the power factor of one molecule thick organic film, the self-assembled monolayer (SAM...Date2019.12.06 Bywebmaster Views221 -
Read More
An Emerging Molecular Design Approach to Heavy-Atom-Free Photosensitizers for Enhanced Photodynamic Therapy under Hypoxia
Sungnam Parkhttps://ultrafastspec.wixsite.com/sparkSangin Kim(제1저자, 통합과정생) A novel strategy for designing highly efficient and activatable photosensitizers that can effectively generate reactive oxygen species (ROS) under both normoxia and hypoxia is proposed. Replacing both oxygen ...Date2019.10.10 Bywebmaster Views315 -
Read More
Ga‐Based Liquid Metal Micro/Nanoparticles: Recent Advances and Applications
Kwangyeol Lee, Hyo Jae Yoonhttp://nanolab.korea.ac.kr/Hyunsun Song(지도교수: 윤효재), Taekyung Kim (지도교수: 이광렬), Seohyun Kang (지도교수: 윤효재), Haneul Jin (지도교수: 이광렬) / 공동 제 1저자 Liquid metals are emerging as fluidic inorganic materials in various research fields. Micro‐ and...Date2019.10.07 Bywebmaster Views534 -
Read More
A Hydrogen-Bonded Organic Framework with Type IV NH3 Adsorption Behavior
Chang Seop Honghttps://www.immlab.korea.ac.kr/Dong Won Kang(강동원, 통합과정, 제1저자) / Minjung Kang(강민정, 통합과정, 제2저자) An S‐shaped gas isotherm pattern displays high working capacity in pressure‐swing adsorption cycle, as established for CO2, CH4, acetylene, and CO. However, ...Date2019.10.07 Bywebmaster Views2036 -
Read More
Janus to Core-Shell to Janus: Facile Cation Movement in Cu2-xS/Ag2S Hexagonal Nanoplates Induced by Surface Strain Control
Kwangyeol Leehttp://nanolab.korea.ac.kr/Taekyung Kim, Jongsik Park, Yongju Hong(공동 제 1저자) Nanocrystals with multiple compositions and hetero-interfaces have received a great attention due to promising multifunctional and synergistic physicochemical properties. In particular,...Date2019.10.02 Bywebmaster Views309 -
Read More
Two Different Length-Dependent Regimes in Thermoelectric Large-Area Junctions of n-Alkanethiolates
Hyo Jae Yoonhttps://hyojaeyoon.wixsite.com/ommlSohyun Park(제1저자, 통합과정) Molecular thermoelectrics is relatively unexplored compared with its analogous research field, molecular electronics. This is surprising considering that the two research fields share an identical energy lands...Date2019.08.02 Bywebmaster Views504 -
Read More
From p-Xylene to Ibuprofen in Flow: 3-Step Synthesis via Unified Sequence of Chemoselective C–H Metalations
Heejin Kimhttps://gowithflow.wixsite.com/hkimHeejin Kim (교신저자) Ibuprofen was prepared from an inactive and inexpensive p-xylene by 3-step flow functionalizations through chemoselective metalations of benzyl positions in sequence using an in-situ generated LICKOR-type superbase. Th...Date2019.07.26 Bywebmaster Views596 -
Read More
Mid-wavelength Infrared Photoluminescence and Lasing of Tellurium Element Solid and Microcrystals
Kwang Seob Jeonghttps://kwangsjeong.wixsite.com/ksjlab-koreaunivDongsun Choi(제1저자, 통합과정) Tellurium has been of great interest in physics, chemistry, material science, and more recently in nanoscience. However, information on the photoluminescence of Te crystals, crucial in understanding the mater...Date2019.07.22 Bywebmaster Views415 -
Read More
Structure–thermopower relationships in molecular thermoelectrics
Hyo Jae Yoonhttps://hyojaeyoon.wixsite.com/ommlSohyun Park (통합과정, 제1저자) Hungu Kang(Post-Doc. 제1저자) Studies of molecular thermoelectrics help to reveal how atomic-detailed structural modification in molecules can affect the thermopower of molecular-scale devices. This review co...Date2019.06.07 Bywebmaster Views332 -
Read More
Cytoplasmic Protein Imaging with Mid-Infrared Photothermal Microscopy: Cellular Dynamics of Live Neurons and Oligodendrocytes
Minhaeng Chohttps://cmsd.ibs.re.kr/html/cmsd_en/Chanjong Park(통합과정, 제1저자) Mid-infrared photothermal microscopy has been suggested as an alternative to conventional infrared microscopy because in addition to the inherent chemical contrast available upon vibrational excitation, it c...Date2019.06.07 Bywebmaster Views641 -
Read More
Conjugated Polyelectrolytes as Multifunctional Passivating and Hole‐Transporting Layers for Efficient Perovskite Light‐Emitting Diodes
Han Young Woohttps://www.ooml.korea.ac.kr/Thanh Luan Nguyen(Post-Doc. 제1저자) Metal halide perovskites (MHPs) have attracted significant attention as light‐emitting materials owing to their high color purities and tunabilities. A key issue in perovskite light‐emitting diodes (PeLE...Date2019.06.07 Bywebmaster Views553 -
Read More
Covalently Linked Perylene Diimide–Polydiacetylene Nanofibers Display Enhanced Stability and Photocurrent with Reversible FRET Phenomenon
Sungnam Parkhttps://ultrafastspec.wixsite.com/sparkBecause of their unique structural and optical properties, 1D perylene diimide (PDI) derivatives have gained attention for use in optoelectronic devices. However, PDI‐containing self‐assembled supramolecular systems often are of limited use ...Date2019.06.07 Bywebmaster Views1265 -
Read More
Blue Emission of α-GaN Colloidal Quantum Dots via Zn Doping
Kwang Seob Jeonghttps://kwangsjeong.wixsite.com/ksjlab-koreaunivYun Chang Choi(최윤창, 제1저자) Gallium nitride (GaN) has been of interest due to its enormous potentials for optoelectronic devices. However, it is very interesting that no proper bottom-up chemical synthesis method for GaN quantum dot has...Date2019.05.27 Bywebmaster Views469 -
Read More
Gas‐phase conformations of intrinsically disordered proteins and their complexes with ligands: Kinetically trapped states during transfer from solution to the gas phase
Hugh I. Kimhttps://www.hughkimlab.com(Jong Yoon Han, 제1저자, 박사과정) Flexible structures of intrinsically disordered proteins (IDPs) are crucial for versatile functions in living organisms, which involve interaction with diverse partners. Electrospray ionization ion mobilit...Date2019.05.27 Bywebmaster Views1829 -
Read More
Multifunctional Self-Doped Nanocrystal Thin-Film Transistor Sensors
Kwang Seob Jeonghttps://kwangsjeong.wixsite.com/ksjlab-koreaunivDongsun Choi(제1저자, 통합과정) Self-doping in nanocrystals allows accessing higher quantum states. The electrons occupying the lowest energy state of the conduction band form a metastable state that is very sensitive to the electrostatic p...Date2019.03.18 Bywebmaster Views444 -
Read More
Fine-tuning of wettability in a single metal–organic framework via postcoordination modification and its reduced graphene oxide aerogel for oil–water separation
Chang Seop Honghttps://www.immlab.korea.ac.kr/Sunhwi Eom(제1저자) Elaborate control of wettability in a single platform is essential for materials’ applications towards oil–water separation, but it still remains challenging. Herein, we performed postcoordination modificatio...Date2019.03.18 Bywebmaster Views659
Designed by sketchbooks.co.kr / sketchbook5 board skin