Article
Materials Science, Multidisciplinary
Wenbo Liu, Zhengyan Jiang, Pai Liu, Kai Wang, Baomin Xu, Guoping Wang, Xiao Wei Sun
Summary: Quasi-2D perovskite light-emitting devices (PeLEDs) have shown great potential for future displays, but the development of white emission PeLEDs has been challenging. However, a new strategy using blue CdSe/ZnS quantum dots (QDs) as the host material has been proposed to improve the energy transfer efficiency in the PeLEDs. The fabricated PeLEDs exhibited stable voltage, high luminance, and improved efficiency compared to pure Quasi-2D PeLEDs.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Physical
A. D. Kurilov, D. N. Chausov, V. V. Osipova, R. N. Kucherov, V. V. Belyaev, Y. G. Galyametdinov
Summary: This work focuses on synthesizing highly luminescent hybrid CdSe/CdS core/shell quantum dots and doping them into a nematic liquid crystal to obtain new composites. The sizes of the quantum dot cores and additional ZnS shells are correlated with the luminescence and dielectric characteristics of the composites.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Bin Bin Jin, Shu Ying Kong, Guo Qing Zhang, Xing Qiao Chen, Hong Shan Ni, Fan Zhang, Dan Jun Wang, Jing Hui Zeng
Summary: The study focuses on inhibiting interfacial charge recombination in CdSe QDSSCs by constructing a ZnS/QDs/ZnS double-layer barrier structure and applying an electric field in VASILAR, achieving higher efficiency.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Hui Zhang, Xiaohu Mi, Bowen Kang, Yunkai Wu, Tingting Zhang, Pai Liu, Xiaowei Sun, Zhenglong Zhang, Ning Liu, Hongxing Xu
Summary: Colloidal nanocrystals play a significant role in optoelectronic devices and their properties can be improved through ligand modification, which can enhance charge transport and emission characteristics in LEDs.
Article
Nanoscience & Nanotechnology
Ali Dabbous, Pierre Bauer, Coralie Marcucci, Sandy Perie, Sapna Gahlot, Christian Lombard, Sylvain Caillat, Jean-Luc Ravanat, Jean-Marie Mouesca, Stephanie Kodjikian, Aude Barbara, Fabien Dubois, Vincent Maurel
Summary: A new modular and easy-to-synthesize photocatalyst was prepared by assembling colloidal CdSe/ZnS quantum dots and gold nanoparticles. The optimized composite exhibited much improved photocatalytic performances due to efficient electron transfer from quantum dots to gold nanoparticles.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Yalian Weng, Guixiong Chen, Junyang Nie, Sihua Que, Suk-Ho Song, Yongshen Yu, Fan Zhang, Hengshan Liu, Xiongtu Zhou, Yongai Zhang, Jie Sun, Jang-Kun Song, Chaoxing Wu, Tailiang Guo, Qun Yan
Summary: This work proposed a novel hybrid device of organic LEDs and inorganic blue GaN LEDs, which can achieve full white and other colors. By applying timing variable opposite voltages, the hybrid device can independently control the emission from blue LEDs or stacked OLEDs to form mixed colors. It has a high color gamut and color rendering index, indicating potential applications in smart solid-state lighting, display, and light communication.
Article
Chemistry, Inorganic & Nuclear
Le Wang, Haochen Sun, Chun Sun, Da Xu, Jiaqi Tao, Tong Wei, Zi-hui Zhang, Yonghui Zhang, Ziying Wang, Wengang Bi
Summary: A lead-free orange-red-emitting compound with high photoluminescence quantum yield was successfully synthesized, showing superior stability and retaining 60% of its initial photoluminescence intensity after 60 days in water. This compound has potential applications in optoelectronic devices.
DALTON TRANSACTIONS
(2021)
Article
Engineering, Environmental
Zhiwen Yang, Gongli Lin, Jieyu Bai, Lechen Li, Yangbin Zhu, Liangrui He, Zhao Jiang, Weijie Wu, Xujiang Yu, Fushan Li, Wanwan Li
Summary: This research presents an efficient method for preparing high color purity inkjet-printed QLEDs using blue InP quantum dots as the emitting layer. The method involves optimizing the core size and shell thickness to achieve high PL quantum yield and suppress energy transfer, which can facilitate the development of large-area electroluminescent full-color displays.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Wenqian Kong, Xingwang Hou, Linfeng Wei, Weifang Chen, Jiyan Liu, Jerald L. Schnoor, Guibin Jiang
Summary: In this study, pumpkin and rice seedlings were exposed to two different types of CdSe/ZnS quantum dots (QDs) to analyze their uptake, translocation, and transformation behaviors in plants. The results showed that both QDs were mainly absorbed by the roots in particulate state, with CdSe/ZnS-CA accumulating more than CdSe/ZnS-PEG-COOH. Surface charges and coatings significantly affected the initial accumulation of QDs, but the impact decreased over time. The ratios of Cd and Se concentrations in stems and leaves differed from QD standards, indicating QD transformation in the exposure system. Se and Cd were more likely to translocate in CdSe/ZnS-PEG-COOH-treated plants.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Physical
Jiangzhi Zi, Yueqi Zhong, Zhao Li, Fan Wu, WeiWei Yang, Zichao Lian
Summary: Photoinduced carrier transfer pathways play a role in the optical and electronic properties of nanomaterials for photocatalytic H-2 evolution, while defects in semiconductor nanocrystals can enhance our understanding of photocatalytic mechanisms. CdSe/ZnS HNPLs with anomalous type-I hole transfer exhibit advantages in efficient charge separation and photocatalytic H-2 evolution, compared to type-II CdSe/ZnSe HNPLs and pristine CdSe NPLs. These results elucidate the role of defect-mediated carrier transfer in visible-light-driven photocatalytic H-2 evolution.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Optics
Ziwei Li, Wen Yang, Ming Huang, Xin Yang, Chenguang Zhu, Chenglin He, Lihui Li, Yajuan Wang, Yunfei Xie, Zhuoran Luo, Delang Liang, Jianhua Huang, Xiaoli Zhu, Xiujuan Zhuang, Dong Li, Anlian Pan
Summary: Mix-dimensional van der Waals heterostructures have attracted worldwide interest in advanced electronics and optoelectronics. This study investigates light-triggered interfacial charge behaviors and enhanced optoelectronic performances in type-II 0D-2D CdSe/ZnS quantum dots/MoS2 vdWHs, providing strong evidence of efficient charge transfer at the 0D-2D interface. The results demonstrate the feasibility of using light-induced charge transfer to optimize the performance of optoelectronic devices.
OPTO-ELECTRONIC ADVANCES
(2021)
Article
Chemistry, Physical
F. A. Sewid, I. D. Skurlov, D. A. Kurshanov, A. O. Orlova
Summary: The photophysical properties of hybrid structures based on CdSe/ZnS quantum dots (QDs) and tetraphenylporphyrin (TPP) molecules have been studied, showing a higher singlet oxygen (SO) generation rate compared to free TPP molecules due to efficient intracomplex Forster Resonance Energy Transfer (FRET) and monomeric TPP preservation. All energy transferred from QDs to TPP is fully utilized for singlet oxygen generation, as there are no new nonradiative channels in the structures. This result is expected to renew interest in QD-based structures with photosensitizers for theranostics applications.
CHEMICAL PHYSICS LETTERS
(2021)
Review
Optics
Ying Han, Xuerui Chang, Xiaohua Cheng, Yufan Lin, Bin-Bin Cui
Summary: This review summarizes the latest progress in synthesis strategy and optical property regulation of organic-inorganic hybrid perovskite quantum dots (OIHP-QDs), as well as their application in light-emitting diodes (QLEDs). The current challenges limiting the applicability of OIHP-QDs are discussed, and the future development direction of OIHP-QDs is proposed.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Physical
Arun Ashokan, Paul Mulvaney
Summary: Solution-phase spectroelectrochemistry was used to study electron injection into colloidal CdSe quantum dots in THF. The results showed reversible optical changes on a time-scale of minutes, with the injection of electrons leading to quenching of photoluminescence. The number of electrons injected into the QDs depended on the electrode potential and QD size, with most injection occurring below the band edge.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Shaojie Liu, Yufei Shu, Meiyi Zhu, Haiyan Qin, Xiaogang Peng
Summary: Most bulk semiconductors show an increase in band-gap energy with decreasing temperature. However, semiconductor quantum dots (QDs) exhibit non-monotonic temperature dependence of the emission energy at low temperatures. This study uses stable and efficient CdSe/CdS/ZnS QDs as a model system to quantitatively explain the origins of the anomalous emission red-shift at temperatures below 40 K. The red-shift is attributed to the temperature-dependent population of band-edge exciton fine levels, enhanced electron-optical phonon coupling due to increasing population of dark excitons, and temperature-dependent electron-acoustic phonon coupling.
Article
Chemistry, Multidisciplinary
Mushfika Baishakhi Upama, Matthew Wright, Md Arafat Mahmud, Naveen Kumar Elumalai, Arman Mahboubi Soufiani, Dian Wang, Cheng Xu, Ashraf Uddin
Article
Chemistry, Multidisciplinary
Md Arafat Mahmud, Naveen Kumar Elumalai, Mushfika Baishakhi Upama, Dian Wang, Leila Zarei, Vinicius R. Goncales, Matthew Wright, Cheng Xu, Faiazul Haque, Ashraf Uddin
Article
Energy & Fuels
Leiping Duan, Haimang Yi, Cheng Xu, Mushfika Baishakhi Upama, Md Arafat Mahmud, Dian Wang, Faiazul Haque Shabab, Ashraf Uddin
IEEE JOURNAL OF PHOTOVOLTAICS
(2018)
Article
Energy & Fuels
Leiping Duan, Cheng Xu, Haimang Yi, Mushfika Baishakhi Upama, Md Arafat Mahmud, Dian Wang, Faiazul Haque, Ashraf Uddin
IEEE JOURNAL OF PHOTOVOLTAICS
(2019)
Article
Nanoscience & Nanotechnology
Leiping Duan, Yu Zhang, Mingrui He, Rong Deng, Haimang Yi, Qingyai Wei, Yingping Zou, Ashraf Uddin
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Chemistry, Physical
Leiping Duan, Yu Zhang, Rong Deng, Haimang Yi, Ashraf Uddin
ACS APPLIED ENERGY MATERIALS
(2020)
Review
Energy & Fuels
Shahriyar Safat Dipta, Ashraf Uddin
Summary: The efficiency of perovskite solar cells has surged in the past decade, but stability remains a key challenge to their commercialization due to vulnerability to environmental factors and device structure. Various groups are actively addressing stability issues and discussing different engineering techniques, as well as the lack of unified criteria for stability tests.
Article
Computer Science, Information Systems
Dong Ma, Guohao Lan, Changshuo Hu, Mahbub Hassan, Wen Hu, Mushfika B. Upama, Ashraf Uddin, Moustafa Youssef
Summary: We present Solar Gest, a system that utilizes photocurrent patterns to recognize hand gestures near a solar-powered device. By exploiting the unique interference caused by each gesture on the incident light rays, Solar Gest can identify the gestures with high accuracy. To enhance its robustness, we employ dynamic time warping and Z-score transformation for signal preprocessing. Evaluation results show that Solar Gest achieves high recognition rates for different solar cell types and consumes significantly less power compared to light sensor based systems.
IEEE TRANSACTIONS ON MOBILE COMPUTING
(2023)
Review
Energy & Fuels
Ashraf Uddin, Haimang Yi
Summary: This review discusses the recent progress and challenges in different SnO2 ETL deposition techniques and the performance of PSC devices. It also mentions additional modifications on SnO2 that can eliminate intrinsic defects in the film. Overall, this article is of great importance for comprehending the relationship between the property of SnO2 and its ETL structure and enhancing PSCs' performance.
Review
Chemistry, Multidisciplinary
Leiping Duan, Ashraf Uddin
Summary: Metal halide perovskite solar cells have achieved power conversion efficiencies exceeding 25.5%, similar to silicon solar cells, but their stability remains a challenge for commercialization due to degradation from external factors. Encapsulation can suppress degradation from oxygen and moisture, however, light and heat-induced degradation are still issues that need to be addressed for improved stability.
MATERIALS CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Physical
Leiping Duan, Haimang Yi, Zhimeng Wang, Yu Zhang, Faiazul Haque, Borong Sang, Rong Deng, Ashraf Uddin
SUSTAINABLE ENERGY & FUELS
(2019)
Article
Chemistry, Multidisciplinary
Leiping Duan, Xianyi Meng, Yu Zhang, Haimang Yi, Ke Jin, Faiazul Haque, Chen Xu, Zuo Xiao, Liming Ding, Ashraf Uddin
MATERIALS CHEMISTRY FRONTIERS
(2019)
Article
Chemistry, Physical
Leiping Duan, Haimang Yi, Yu Zhang, Faiazul Haque, Cheng Xu, Ashraf Uddin
SUSTAINABLE ENERGY & FUELS
(2019)
Article
Chemistry, Physical
Haimang Yi, Dian Wang, Md Arafat Mahmud, Faiazul Haque, Mushfika Baishakhi Upama, Cheng Xu, Leiping Duan, Ashraf Uddin
ACS APPLIED ENERGY MATERIALS
(2018)
Article
Chemistry, Multidisciplinary
Faiazul Haque, Matthew Wright, Md Arafat Mahmud, Haimang Yi, Dian Wang, Leiping Duan, Cheng Xu, Mushfika Baishakhi Upama, Ashraf Uddin
