Article
Chemistry, Multidisciplinary
Xue Bai, Finn Purcell-Milton, Yurii K. Gun'ko
Summary: Cu-Based quantum dots are being explored as a potential replacement for toxic Cd- or Pb-based QDs, with studies focusing on the impact of different reaction conditions on the resulting morphologies and optical properties. By carefully controlling the ZnS shell deposition, researchers have optimized the synthesis of CIZS/ZnS/ZnS QDs and produced highly fluorescent core/shell/shell heterostructured QDs with high PLQYs. Additionally, the successful creation of giant ZnS shell QDs opens up possibilities for further development in this area.
Article
Materials Science, Multidisciplinary
Tran Thi Thu Huong, Nguyen Thu Loan, Le Van Long, Tran Dinh Phong, Thuy Ung Thi Dieu, Nguyen Quang Liem
Summary: This article presents the high yield solvothermal syntheses of AgInS2 (AIS) core nanocrystals (NCs) and AIS/ZnS core/shell NCs that emit stably strong luminescence peaking around 665 nm. Increasing the thickness of the ZnS shell enhances the stability and luminescence of AIS/ZnS core/shell NCs. Time-resolved PL spectra show a longer emission delay in AIS/ZnS core/shell NCs.
Article
Chemistry, Physical
Jiajia Ning, Yuan Xiong, Stephen Kershaw, Andrey L. Rogach
Summary: The most efficient way to improve the stability and optical properties of nanocrystals is to grow shell around their cores. Different growth modes of the ZnS shell on ZnSe nanorods were observed depending on the crystal structure of the ZnSe core, leading to differences in photoluminescence quantum yield.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Nyamsuren Byambasuren, Jiyeon Jo, Hyungduk Ko, Byeong-Kwon Ju, Ji Young Byun, Ho Seong Jang
Summary: Blue-light-emitting ZnSe/ZnS C/S QDs were synthesized and studied for their optical and structural properties, showing great potential in blue and white LED applications.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Multidisciplinary
Salima Mabrouk, Herve Rinnert, Lavinia Balan, Jordane Jasniewski, Sebastien Blanchard, Ghouti Medjahdi, Rafik Ben Chaabane, Raphael Schneider
Summary: In this study, 3-mercaptopropionic acid (3-MPA)-capped core/shell/shell ZnSeS/Cu:ZnS/ZnS QDs were synthesized in aqueous phase. The influence of Cu dopant location and loading on the photoluminescence properties of the QDs was investigated. The results showed that introducing Cu dopant in the first ZnS shell led to QDs with the highest PL quantum yield. Additionally, the emission color shifted from blue-green to green with increased Cu doping.
Article
Chemistry, Physical
Ho-Kyung Lee, Ye-Jun Ban, Hyun-Jong Lee, Ji-Hyeon Kim, Sang-Joon Park
Summary: In this paper, a new blue-emitting material called CuCrS2/ZnS QDs (CCS QDs) was introduced. The CCS QDs were prepared in a core/shell structure through a one-pot synthesis using 1-dodecanethiol as a sulfur source and co-ligand. The CCS QDs exhibited a semi-spherical colloidal nanocrystalline shape with an average diameter of 9.0 nm and ZnS shell thickness of 1.6 nm. The PL max was observed at 465 nm with an excitation wavelength of 400 nm and PLQY was 5% at an initial [Cr3+]/[Cu+] molar ratio of one in the core synthesis. With an increase in the initial molar ratio, the CCS QDs showed slightly blue-shifted PL emission spectra and increased PLQY, reaching a maximum of 10% at a molar ratio of 2.0 (462 nm PL max). However, when the initial molar ratio exceeded two, non-emissive Cr2S3 nanoflakes formed, resulting in a lower photoluminescence quantum yield of 4.5% with a PL max of 461 nm at a molar ratio of four.
Article
Chemistry, Multidisciplinary
Kai Zhang, Yue Xu, Fan Liu, Guo-Ping Yan, San-Wei Guo
Summary: Novel cooperative ZnS-CdSe@Co/N-C core/shell composites were prepared by chelation and modification, which possessed heterojunction and cocatalyst properties, and showed improved optical absorption and photocatalytic properties.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Patrycja Kowalik, Sebastian G. Mucha, Katarzyna Matczyszyn, Piotr Bujak, Leszek M. Mazur, Andrzej Ostrowski, Angelika Kmita, Marta Gajewska, Adam Pron
Summary: By introducing two consecutive injections of sulfur and silver precursors, ternary and alloyed quaternary nanocrystals were successfully prepared, showing clearly separated photoluminescence peaks in both types of nanocrystals to confirm their heterogenic nature. The photoluminescence mechanism in the nanocrystals exhibited a simple exciton radiative recombination mechanism for the emission at shorter wavelengths with a nanosecond lifetime, while a more complex exciton trap state mechanism was observed for the emission at longer wavelengths with a microsecond lifetime depending on the composition of the ternary (or quaternary) phase.
INORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Physical
Paul Cavanaugh, Ilan Jen-La Plante, Christian Ippen, Ruiqing Ma, David F. Kelley, Anne Myers Kelley
Summary: Resonance Raman spectra and absolute cross sections of InP/ZnSe/ZnS core/shell/shell nanocrystals were obtained at different excitation wavelengths, revealing differences in phonon features attributed to various stoichiometries of the structures. The presence of excess indium in the ZnSe shell was found to influence the Raman intensities and frequency distributions, supporting previous assignments of hole trapping at indium defects in the shell.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Celine Rivaux, Tugce Akdas, Ranjana Yadav, Omar El-Dahshan, Davina Moodelly, Wai Li Ling, Dmitry Aldakov, Peter Reiss
Summary: Continuous flow synthesis of highly luminescent AIS/ZnS QDs was achieved with high PLQY values in short reaction times, by optimizing reaction parameters and favoring the formation of defect complexes through the addition of excess indium and low reaction temperatures. Structural disorder and the formation of ZnIn- antisite defects during ZnS shell growth contribute to the high efficiency of the QDs. The presented method allows for excellent reproducibility and scalability for large-scale production.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Yuxiu Jia, Hui Liu, Peng Cai, Xinran Liu, Luolisha Wang, Ling Ding, Guiyun Xu, Wei Wang, Mingxia Jiao, Xiliang Luo
Summary: This study presents an aqueous synthesis approach for Cu-In-Se/ZnS quantum dots emitting in the near-infrared spectral range. The photoluminescence of the dots can be effectively controlled by adjusting the sulfur source, resulting in increased quantum yields by four times and red-shifted emission peaks from 809 nm to 830 nm.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Jungho Kim, Jiwan Kim
Summary: This study explores the limitations of poly(3,4-ethylenedioxythiophene):poly(styrene-sulfonate) as a hole injection layer (HIL) in QLEDs and investigates NiO/ZnS core-shell nanostructures as an alternative HIL. The ZnS shell effectively suppresses exciton quenching and regulates charge transfer, resulting in highly bright and efficient QLEDs. The findings highlight the potential of NiO/ZnS as an inorganic material for stable all-inorganic QLEDs.
Article
Engineering, Electrical & Electronic
Yuan Liu, Cong Zhao, Jingzhou Li, Shixi Zhao, Xiaomin Xu, H. Y. Fu, Cunjiang Yu, Feiyu Kang, Guodan Wei
Summary: The high-performance photodetectors based on environmentally benign CuInS2/ZnS core-shell quantum dots, in combination with organic blend films, achieve efficient energy transfer and charge separation, leading to low dark current and high detectivity. This work demonstrates a feasible strategy to develop highly sensitive photodetectors using heavy-metal-free core-shell quantum dots.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Physical
Andrei Mitrofanov, Anatol Prudnikau, Francesco Di Stasio, Nelli Weiss, Rene Huebner, Anna Maria Dominic, Konstantin B. L. Borchert, Vladimir Lesnyak, Alexander Eychmueller
Summary: This study successfully synthesized core/shell NPLs containing 0D CdxHg1-xSe domains in CdSe NPLs, and coated them with a CdyZn1-yS shell while preserving their 2D morphology. The NPLs exhibit bright photoluminescence in the near-infrared range with high quantum yields, making them a promising material for light-emitting applications.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Shijia Zeng, Zhenbo Li, Wenjiang Tan, Jinhai Si, Yuren Li, Xun Hou
Summary: This study compares the ultrafast carrier dynamics in InP/ZnSe/ZnS core/shell/shell quantum dots (CSS-QDs) and InP/ZnS core/shell QDs (CS-QDs), revealing the impact of the ZnSe midshell on carrier dynamics. The results show that the ZnSe midshell enhances electron delocalization, prolongs the in-band relaxation time of electrons and holes, and reduces defect emissions. Additionally, the ZnSe midshell leads to an increased density of higher-energy hole states, which may decrease the probability of Auger recombination.
Article
Nanoscience & Nanotechnology
Xiaojiao Kang, Yanchun Yang, Lan Wang, Song Wei, Daocheng Pan
ACS APPLIED MATERIALS & INTERFACES
(2015)
Article
Chemistry, Inorganic & Nuclear
Lan Wang, Xiaojiao Kang, Lijian Huang, Daocheng Pan
DALTON TRANSACTIONS
(2015)
Article
Chemistry, Multidisciplinary
Xiaojiao Kang, Yanchun Yang, Lijian Huang, Ying Tao, Lan Wang, Daocheng Pan
Article
Chemistry, Physical
Yanchun Yang, Xiaojiao Kang, Lijian Huang, Song Wei, Daocheng Pan
JOURNAL OF PHYSICAL CHEMISTRY C
(2015)
Article
Nanoscience & Nanotechnology
Yanchun Yang, Xiaojiao Kang, Lijian Huang, Daocheng Pan
ACS APPLIED MATERIALS & INTERFACES
(2016)
Article
Chemistry, Multidisciplinary
Song Wei, Yanchun Yang, Xiaojiao Kang, Lan Wang, Lijian Huang, Daocheng Pan
CHEMICAL COMMUNICATIONS
(2016)
Article
Chemistry, Physical
Yanchun Yang, Xiaojiao Kang, Lijian Huang, Song Wei, Daocheng Pan
JOURNAL OF POWER SOURCES
(2016)
Article
Chemistry, Inorganic & Nuclear
Lan Wang, Xiaojiao Kang, Daocheng Pan
INORGANIC CHEMISTRY
(2017)
Article
Chemistry, Inorganic & Nuclear
Song Wei, Yanchun Yang, Xiaojiao Kang, Lan Wang, Lijian Huang, Daocheng Pan
INORGANIC CHEMISTRY
(2017)
Article
Chemistry, Analytical
Hua Wu, Renjie Liu, Xiaojiao Kang, Chengyun Liang, Lei Lv, Zhijun Guo
Article
Chemistry, Applied
Lei Lv, Yongdong Jin, Xiaojiao Kang, Yangyang Zhao, Chengbi Cui, Zhijun Guo
Article
Chemistry, Physical
Wei Lu, Huawei Xu, Mingming Hao, Hongcheng Wang, Xiaojiao Kang
JOURNAL OF ALLOYS AND COMPOUNDS
(2018)
Article
Chemistry, Analytical
Renjie Liu, Hua Wu, Lei Lv, Xiaojiao Kang, Chengbi Cui, Jin Feng, Zhijun Guo
Article
Materials Science, Multidisciplinary
Xiaojiao Kang, Wei Lu, Hongcheng Wang, Dongxiong Ling
MATERIALS RESEARCH BULLETIN
(2018)
Article
Chemistry, Multidisciplinary
Xiaojiao Kang, Song Lu, Hongcheng Wang, Dongxiong Ling, Wei Lu