Article
Optics
Lukas Elsinger, Robin Petit, Frederik Van Acker, Natalia K. Zawacka, Ivo Tanghe, Kristiaan Neyts, Christophe Detavernier, Pieter Geiregat, Zeger Hens, Dries Van Thourhout
Summary: Colloidal quantum dots (QDs) are shown to be a promising light source for visible photonics, with integrated LED devices featuring high current density, power density, and low dark current. These devices are expected to find applications in absorption spectroscopy, bio-sensing, and could potentially be used for building electrically pumped lasers at a low cost.
LASER & PHOTONICS REVIEWS
(2021)
Article
Nanoscience & Nanotechnology
Chia-Ching Huang, Yingying Tang, Marco van der Laan, Jorik van de Groep, A. Femius Koenderink, Katerina Dohnalova
Summary: The study directly assessed the size dependence of the optical band gap and found that the optical band gap is given by the amorphous shell. It proposes that structural disorder might be the reason behind the limited emission tunability from various Si-NPs. The results suggest a pressing need for development and broader use of direct correlative single-dot microscopy methods.
ACS APPLIED NANO MATERIALS
(2021)
Article
Polymer Science
Chengbing Gong, Bihua Xiao, Xianhai Hu, Yuxi Xian, Ping Wang, Yuqing Yang, Xiang Luo, Mingjun Li, Jin Liu, Yunsheng Ding, Pei Xu, Chao Liu
Summary: An amino-hydroxy-functionalized strongly fluorescent hybrid silicon quantum dots (znoSiQDs) were prepared using a green and simple method. These znoSiQDs were then used as chain extenders to synthesize waterborne polyurethane-based hybrid fluorescent silicon quantum dots (znoSiQDs-WPU). The znoSiQDs-WPU exhibited enhanced fluorescence intensity, expanded UV shielding range, longer luminescent life, and improved thermal stability compared to znoSiQDs. The use of water as a solvent also makes znoSiQDs-WPU a safer and more environmentally friendly material option.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Optics
Yaonan Hou, Ilias Skandalos, Mingchu Tang, Hui Jia, Huiwen Deng, Xuezhe Yu, Yasir Noori, Spyros Stathopoulos, Siming Chen, Huiyun Liu, Alwyn Seeds, Graham Reed, Frederic Gardes
Summary: We investigate the surface and interface engineering on InAs quantum dot emitters using edge-emitting light-emitting diodes encapsulated with non-stoichiometric silicon nitride (SiN) layers. Our findings show that silicon-rich SiN is an excellent choice for both electrical and optical passivation, reducing surface recombination. However, N-rich SiN deposited by the same method does not provide effective passivation under electrical injection. This research provides important insights for the monolithic integration of InAs quantum dot emitters with CMOS photonics components.
JOURNAL OF LUMINESCENCE
(2023)
Review
Chemistry, Applied
Joana F. B. Barata, M. Graca P. M. S. Neves, Paula S. S. Lacerda, Pedro Conceicao, Tito Trindade
Summary: Quantum dots (QDs) are important nanomaterials for the development of optical devices, and their non-covalent assembly with phthalocyanines (Pcs) allows for the exploration of new properties and applications. Current research mainly focuses on cadmium-containing QDs and energy transfer processes between the inorganic/organic components.
Article
Chemistry, Physical
Yang Li, Min Ge, Shouquan Yu, Huifeng Zhang, Chuanbing Huang, Weijia Kong, Zhiguang Wang, Weigang Zhang
Summary: The effect of Si3N4 content on the microstructure of BN/Si3N4 composite ceramics was investigated, and it was found that the crystallization of Si3N4 could be totally restrained when its content was below 25 wt%, resulting in the formation of amorphous BN/Si3N4 composite ceramic.
Article
Physics, Applied
Tomohisa Mizuno, Takashi Aoki, Toshiyuki Sameshima
Summary: The experimental study investigates the influence of Si surface orientation on the formation and photoluminescence properties of SiC dots. The results show that the diameter and surface density of SiC dots depend on Si surface orientation, and the photoluminescence intensity of SiC dots is strongly influenced by Si surface orientation and Si atom surface density.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Physical
Dongke Li, Jiaming Chen, Zhaoguo Xue, Teng Sun, Junnan Han, Wanghua Chen, Etienne Talbot, Remi Demoulin, Wei Li, Jun Xu, Kunji Chen
Summary: Understanding the distribution and behavior of dopants in silicon nanocrystals is crucial for achieving controllable doping at the nanoscale and developing next-generation optoelectronic devices. This study investigates the atomic-scale distributions of phosphorus and boron dopants in silicon nanocrystal multilayers. The results show that phosphorus dopants mainly concentrate on the surfaces of silicon nanocrystals to passivate dangling bonds and provide free electrons, while boron dopants exhibit a different distribution pattern, forming a dopant-shell covering on the surfaces of silicon nanocrystals and leading to damage in the crystalline lattice.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Mithun Bhowmick, Bruno Ullrich, Madeline Murchland, Xuan Zhou, Chari Ramkumar
Summary: Saturable absorption in perovskite quantum dot (PQD) films, leading to saturation in photoluminescence (PL), is observed. The influence of excitation intensity and host-substrate on PL intensity growth is investigated using drop-casting films. PQD films are deposited on single-crystal GaAs, InP, Si wafers, and glass. The observations confirm substrate-dependent optical properties due to absorption nonlinearities in the system and can be extended for all-optical switches with a bulk semiconductor host.
Article
Chemistry, Multidisciplinary
Hyeongwoo Lee, Ju Young Woo, Dae Young Park, Inho Jo, Jusun Park, Yeunhee Lee, Yeonjeong Koo, Jinseong Choi, Hyojung Kim, Yong-Hyun Kim, Mun Seok Jeong, Sohee Jeong, Kyoung-Duck Park
Summary: Strain engineering of perovskite quantum dots (pQDs) at the single-emitter level has been achieved using tip-enhanced photoluminescence (TEPL) spectroscopy. By systematically modulating tip-induced compressive strain, dynamic bandgap engineering in a reversible manner has been successfully demonstrated on a single pQD.
Article
Chemistry, Multidisciplinary
Natalia Bushlanova, Vladimir Baturin, Sergey Lepeshkin, Yurii Uspenskii
Summary: Silicon nanocrystals have significant potential in various applications, with their structural morphology and photo-physical characteristics being sensitive to hydrogenation degree. The clusters of hydrogen-passivated silicon can undergo different structural types, with a key importance on removing dangling bonds and passivating surface broken bonds.
Correction
Optics
Pengzhan Zhang, Leng Zhang, Yaozheng Wu, Sake Wang, Xuefeng Ge
Summary: This article presents an erratum to a paper, clarifying that the first organization of the research articles should be Nanjing University due to the statistical requirements of the postdoctoral assessment. It also states that all experimental data in this article were obtained in the laboratory of Nanjing University.
Article
Chemistry, Multidisciplinary
Quang Nhat Dang Lung, Rafael Jumar Chu, Yeonhwa Kim, Tsimafei Laryn, May Angelu Madarang, Oleksiy Kovalchuk, Yong-Won Song, In-Ho Lee, Changsoon Choi, Won Jun Choi, Daehwan Jung
Summary: High quantum efficiency nanoscale devices face challenges due to carrier loss at the surface. Low dimensional materials like 0D quantum dots and 2D materials have been studied to reduce the loss. In this study, we demonstrate a significant enhancement in photoluminescence from graphene/III-V quantum dot mixed-dimensional heterostructures. The distance between graphene and quantum dots in the hybrid structure determines the degree of radiative carrier recombination enhancement. Time-resolved photoluminescence decay also shows increased carrier lifetimes with decreased distance. The proposed optical enhancement mechanism involves energy band bending and hole carrier transfer, which rebalance the carrier densities in quantum dots. This 2D graphene/0D quantum dot heterostructure shows promise for high performance nanoscale optoelectronic devices.
Article
Materials Science, Ceramics
Yu N. Novikov, V. A. Gritsenko
Summary: The charge transport mechanism in amorphous silicon nitride (a-SiNx) was experimentally analyzed, and it was found that the commonly used Frenkel effect with thermally assisted tunneling (TAT) does not adequately describe the charge transport in a-SiNx. Instead, the multiphonon trap ionization mechanism provides a satisfactory explanation for the experimental results.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Chemistry, Physical
Swarnali Ghosh, Saptarshi Mandal, Soumen Mukherjee, Chayan K. De, Tridib Samanta, Mrinal Mandal, Debjit Roy, Prasun K. Mandal
Summary: This research reports the achievement of near-unity photoluminescence quantum yield and highly suppressed blinking in a toxic-metal-free quantum dot, making it suitable for single-particle tracking and bioimaging purposes.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Optics
J. M. Ashfaq, B. C. Hu, N. Zhou, X. L. Li, C. Y. Ma, Q. Y. Zhang
JOURNAL OF LUMINESCENCE
(2015)
Article
Chemistry, Physical
Q. Y. Zhang, J. M. Ashfaq, B. C. Hu, J. Y. Wang, N. Zhou
JOURNAL OF ALLOYS AND COMPOUNDS
(2016)
Article
Optics
J. M. Ashfaq, B. C. Hu, N. Zhou, J. Shaibo, C. Y. Ma, Q. Y. Zhang
JOURNAL OF LUMINESCENCE
(2016)
Article
Materials Science, Multidisciplinary
X. Q. Cheng, C. Y. Ma, X. Y. Yi, F. Yuan, Y. Xie, J. M. Hu, B. C. Hu, Q. Y. Zhang
Article
Materials Science, Multidisciplinary
X. Y. Yi, C. Y. Ma, F. Yuan, N. Wang, F. W. Qin, B. C. Hu, Q. Y. Zhang
Article
Chemistry, Physical
Shi Wang, Chunyang Zhang, Yulin Feng, Yingying Shao, Ying Yan, Qingshun Dong, Junxue Liu, Beichen Hu, Shengye Jin, Yantao Shi
JOURNAL OF MATERIALS CHEMISTRY A
(2018)
Article
Nanoscience & Nanotechnology
N. Zhou, B. C. Hu, Q. Y. Zhang, C. Y. Ma, S. Z. Hao
Article
Physics, Applied
Bei-Chen Hu, Nan Zhou, Qing-Yu Zhang, Chun-Yu Ma
APPLIED PHYSICS EXPRESS
(2019)
Article
Physics, Applied
B. C. Hu, N. Zhou, Q. Y. Zhang, C. Y. Ma
APPLIED PHYSICS LETTERS
(2019)
Article
Physics, Applied
N. Zhou, B. C. Hu, Q. Y. Zhang, C. Y. Ma, S. Z. Hao
JOURNAL OF APPLIED PHYSICS
(2019)
Article
Optics
B. C. Hu, N. Zhou, Q. Y. Zhang, C. Y. Ma
Summary: The photoluminescence spectra of ZnO samples showed that the excitation behavior of the structured green luminescence band is influenced by surface conditions and defects density near the sample surface. The efficacy of SiOx passivation on the green luminescence band is determined by the presence of imperfections on the sample surface. The phonon energy in the green luminescence band is associated with surface optical mode.
JOURNAL OF LUMINESCENCE
(2021)
Article
Physics, Multidisciplinary
Zhou Nan, Zheng Qiang, Hu Bei-Chen, Shi De-Quan, Miao Chun-Yu, Ma Chun-Yu, Liang Hong-Wei, Hao Sheng-Zhi, Zhang Qing-Yu
ACTA PHYSICA SINICA
(2014)
Article
Optics
R. B. Adamov, G. A. Melentev, I. V. Sedova, S. V. Sorokin, G. V. Klimko, I. S. Makhov, D. A. Firsov, V. A. Shalygin
Summary: This study investigates the THz luminescence in doped nanostructures with GaAs/AlGaAs quantum wells under interband optical pumping. The results show that the spatial separation of donors and acceptors can greatly enhance the integrated intensity of THz emission.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Yanru Li, Lei Zhong, Sha Jiang, Yutong Wang, Binyao Huang, Guotao Xiang, Li Li, Yongjie Wang, Chuan Jing, Xianju Zhou
Summary: In this study, a ratiometric luminescent thermometry based on dual-emission centers was developed using co-doped CaNb2O6 phosphors with Bi3+ and Pr3+. The obtained samples exhibited good thermosensitive and thermochromic characteristics, with a maximum absolute sensitivity of 0.09 K-1 @ 528 K and a maximum relative sensitivity of 2.17 % K-1 @ 453 K.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Yujing Gong, Yeqing Wang, Zhiyuan Wang, Yijian Sun, Yi Yu
Summary: Single crystals of Dy3+ single-doped and Dy3+/Tb3+ co-doped CaYAlO4 were grown and analyzed. The incorporation of Tb3+ resulted in increased absorption and emission cross sections. The fluorescence lifetimes and branching ratios of the yellow emission were affected by the presence of Tb3+. The deactivation effect of Tb3+ ions and energy transfer mechanism were also discussed.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Lu Chen, Zhuangzhuang Ma, Jian Chen, Wang Guo
Summary: This study focuses on enhancing the thermal robustness of phosphor converter materials by preparing composite ceramics of YAG:Ce combined with high-thermal-conductivity MgO. The composite ceramics showed high density and thermal conductivity at the optimum temperature of 1400℃. Stable laser-driven white light was obtained under blue laser excitation.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Yuwei Wu, Chunhui Niu, Lei Wang, Mingqing Yang, Shiyu Zhang
Summary: Er3+-doped germanate-tellurite glasses were prepared and their structure, luminescent, and temperature-sensing properties were studied. The glass exhibited large values of O2 and O6 and its luminescence intensity varied with temperature.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Kensei Ichiba, Takumi Kato, Kenichi Watanabe, Yuma Takebuchi, Daisuke Nakauchi, Noriaki Kawaguchi, Takayuki Yanagida
Summary: In this study, Eu-doped YVO4 single crystals with different concentrations were fabricated to evaluate their photoluminescence and scintillation properties. The results showed that the samples doped with Eu exhibited emission peaks due to 4f-4f transitions in PL and scintillation spectra. Based on the pulse height spectra, the light yield of the Eu-doped samples increased with increasing Eu concentration, while the afterglow level decreased.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Daiwen Xiao, Hei-Yui Kai, Anjun Huang, Menglin Song, Ka-Leung Wong, Peter A. Tanner
Summary: The emission spectra of Cs2NaEuCl6 nanoparticles synthesized by the hot injection method are explained. The dispersion of the nanoparticles in alkane solvents in the experiment allows the determination of the magnetic dipole radiative rate for the D-5(0) -F-7(1) channel in vacuum, which is in agreement with the calculated value.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Italia V. Barbosa, Geraldine Dantelle, Alain Ibanez, Lauro J. Q. Maia
Summary: The thermal response and luminescence properties of different oxide matrices were evaluated to design more accurate thermal probes. It was found that thermal probes emitting in BW-II provide better thermal sensing with higher signal-to-noise ratio. Additionally, doping Nd3+ in Y2O3 matrix maximizes luminescence intensity, making it a promising matrix for thermal sensing.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Xin Li, Yu Zhang, Hongrui Ren, Lunlong Xie, Yinsheng Di, Mengqing Han, Zhaohui Bai, Quansheng Liu, Liangliang Zhang, Jiahua Zhang
Summary: This study successfully prepared phosphor samples based on Ca3-xLuxSc2-xMgxSi3O12:Ce3+ and investigated their luminescence properties. With the increase in Lu-Mg concentration, the peak of the sample redshifted, but the thermal stability gradually decreased. The LD devices made from CLSMS:Ce3+ fluorescent materials showed a decrease in cyan-green light and an increase in red light as the Lu-Mg concentration increased.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Tim Pier, Julia Hopster, Thomas Juestel
Summary: This study investigates and reports on several samples of cerium-activated gallium-based garnet phosphors. The optimal activator concentration was found to be 1 atom-%. The size of non-emitting lanthanide ions and the molar concentration of cerium strongly influenced the crystal field splitting, which in turn shaped the excitation and emission wavelengths.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Guijie Zhao, Wei Shi, Xin Xin, Fengcai Ma, Yongqing Li
Summary: This study reveals for the first time the proton transfer pathways and changes in the photophysical properties of P-TNS with three intramolecular hydrogen bonds. The reaction mechanism and driving force for the proton transfer process are explained through analysis of potential energy surface, frontier molecular orbitals, and hydrogen bond parameters, among others.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Li He, Jinshu Huang, Zhengce An, Haozhang Huang, Yu Zhao, Kexin Zhong, Bo Zhou
Summary: In this study, we designed a NaYF4:Yb3+/Tm3+@NaYF4 core-shell nanostructure to achieve thermochromic upconversion and high thermal sensitivity. We found that the blue upconversion emission of Tm3+ decreased while the deep-red emission increased with elevating temperature. The sample also showed a gradual emission color change from blue to purplish-red, and the optimal relative sensitivity reached 2.79% K-1.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Rupesh A. Talewar
Summary: A series of Li2TiO3 phosphors doped with Mn4+ and codoped with Mn4+ and Er3+ were synthesized, which demonstrated the ability of Mn4+ ions to absorb UV-Vis photons and subsequently transfer energy to Er3+ ions, resulting in the emission of near-infrared light. These materials have the potential to enhance the absorption efficiency of Er3+-based luminescent materials.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
Xingyuan Ma, Jianfeng Li
Summary: Carbon quantum dots (CQDs) with tunable photoluminescence properties have been synthesized using suitable carbon and dopant sources in an aqueous system. The synthesized CQDs exhibited blue, green, yellow, and red emissions, and solid-state luminescence was achieved through the preparation of solid-state fluorescent films and phosphors. This study provides important technical support for the future development of CQDs synthesis.
JOURNAL OF LUMINESCENCE
(2024)
Article
Optics
De Bin Fu, Yang Bing Xu, Yu Teng Zhang, Shan Ting Liu, Xiao Fei Yang, Sheng Hua Liu
Summary: A pair of new chiral molecules, (S)-4 and (R)-4, have been designed and synthesized by introducing valine-containing groups at symmetrical positions on the periphery of an indolo[3,2-b]carbazole unit. These molecules exhibit aggregation-induced circular dichroism (AICD) properties in DMF/water mixtures, and in a mixture with 99% water fraction, they show strong, mirror-image, blue circularly polarized luminescence (CPL) signals.
JOURNAL OF LUMINESCENCE
(2024)