Article
Nanoscience & Nanotechnology
Chunyan Yang, Rui Ma, Zhe Wang, Yuanyuan Wang, Chaoyu Yu, Yonggang Liu, Yanfu Wan, Jianfeng Li, Junfeng Tong, Peng Zhang, Heng Zhang
Summary: In this study, a 35 nm thick CdS film was developed as an interfacial modification layer in quantum dot light-emitting diodes (QLEDs) to improve device performance by enhancing charge balance and suppressing interfacial exciton quenching.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Mohsen Azadinia, Tyler Davidson-Hall, Dong Seob Chung, Atefeh Ghorbani, Fatemeh Samaeifar, Junfei Chen, Peter Chun, Quan Lyu, Giovanni Cotella, Hany Aziz
Summary: Using a wider band gap quantum dot layer as an interlayer can improve the performance of inverted quantum dot light-emitting devices with a polymeric hole transport layer, resulting in higher efficiency and longer lifetime.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Nagarjuna Naik Mude, Yeasin Khan, Truong Thi Thuy, Bright Walker, Jang Hyuk Kwon
Summary: This study reports the development of high-efficiency and long-lifetime inverted green cadmium-free quantum dot light-emitting diodes (QLEDs) using a stable ZnO/ZnS cascaded electron transport layer (ETL). The use of ZnO/ZnS cascaded ETL allows for reduced electron injection, improving charge balance and suppressing exciton quenching in the QD layer. The optimized devices achieved significantly improved efficiency and long lifetime compared to reference devices.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Hanleem Lee, Seungeun Lee, Hyoyoung Lee
Summary: By using new cross-linkable spacer ligands, a highly emissive QD:TFB-blended LED device with controlled charge and energy transfers has been developed. The best spacer ligand, a 10-((2-benzoylbenzoyl)oxy)decanoic acid, effectively anchors TFB and bonds to QDs, improving LED performance significantly.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Ceramics
Xudong Jin, Zhengkuan Yun, Guangmei Zhai, Wei Jia, Yanqin Miao, Chunyan Yu, Yongzhen Yang, Hua Wang, Xuguang Liu, Bingshe Xu
Summary: Quantum dot light-emitting diodes (QLEDs) have been recognized as the potential solution for next-generation displays, solid-state lighting, and optical communication applications. However, achieving high efficiency and high brightness simultaneously still poses challenges. In this study, researchers developed a strategy to enhance charge injection balance and suppress interfacial exciton quenching in red QLEDs, resulting in high luminance intensity, peak external quantum efficiency, and low efficiency roll-off at high luminance. This breakthrough paves the way for practical applications of QLED technology in lighting, displays, and optical communication.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Xudong Jin, Zhengkuan Yun, Guangmei Zhai, Wei Jia, Yanqin Miao, Chunyan Yu, Yongzhen Yang, Hua Wang, Xuguang Liu, Bingshe Xu
Summary: Quantum dot light-emitting diodes (QLEDs) are considered the ideal choice for next-generation displays, solid-state lighting, and optical communication. Achieving high efficiency and high brightness in QLEDs remains challenging. This study presents a simple and effective strategy to enhance charge injection balance and suppress interfacial exciton quenching in QLEDs by incorporating 3-aminopropyl triethoxysilane (APTES) into a ZnO nanocrystal-solution. The results demonstrate that using quasi core/shell-structured ZnO/SiO2 nanoparticles as electron transport materials can lead to QLEDs with both high efficiency and high luminance.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Changgi Yoon, Jiwan Kim
Summary: In this study, high efficiency quantum dot light-emitting diodes (QLEDs) consisting of a mixed layer of TiO2 nanoparticles (NPs) and quantum dots (QDs) were demonstrated. The use of ZnO as a key material led to promising results in terms of the electroluminescence devices' energy levels and robustness. Li-doped TiO2 NPs were synthesized as an alternative electron transport layer (ETL) and successfully applied to QLEDs, resulting in a simplified device structure with comparable performance to conventional QLEDs.
KOREAN JOURNAL OF METALS AND MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Kuo-Yang Lai, Shuan Yang, Pin-Ru Chen, Min-Hua Yeh, Man-Lin Liao, Chang-Wei Yeh, Shih-Jung Ho, Yao-Tang Chang, Hsueh-Shih Chen
Summary: An Electroluminescent (EL) quantum dot light-emitting diode (QLED) array for pixel-on-demand display with 75 emitting zones has been demonstrated. By applying common electrode voltage to unselected rows, undesired electrical crosstalk can be effectively suppressed, allowing pixels to emit independently as needed. This study shows the feasibility of realizing a passive-matrix (PM) QLED display using a bank-free quantum dot film prepared from a coating process.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Spectroscopy
Vineet Sharma, Mohan Singh Mehata
Summary: Blue fluorescent zinc selenide quantum dots were synthesized using 3-mercaptopropionic acid at a lower temperature through a direct aqueous route. The photoluminescence characteristics were utilized to detect picric acid in water, with a selective quenching effect observed with increasing concentrations. The proposed sensing probe showed linearity in the range of 2.0 μM-0.25 mM with a detection limit of 12.4 x 10(-6) M, without interference from other nitroaromatic compounds.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Nanoscience & Nanotechnology
Yinglin Qiu, Zhipeng Gong, Lei Xu, Qiaocan Huang, Zunxian Yang, Bingqing Ye, Yuliang Ye, Zongyi Meng, Zhiwei Zeng, Zihong Shen, Wenbo Wu, Yuanqing Zhou, Zeqian Hong, Zhiming Cheng, Songwei Ye, Hongyi Hong, Qianting Lan, Fushan Li, Tailiang Guo, Sheng Xu
Summary: CdSe-based quantum dots have become important for emerging display materials due to their suitable bandgap, controllable size, and high PLQY. This study addresses the problems with CdSe QD films, such as fluorescence quenching and low conductivity, by using a shorter thiol ligand and adding a thin layer of cesium carbonate. The optimized QLED device shows improved performance in terms of luminance and current efficiency.
ACS APPLIED NANO MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Donggu Lee, Jaehoon Lim, Myeongjin Park, Chan-Mo Kang, Hyunkoo Lee
Summary: The research investigated the impact of the hole transport layer on the device characteristics of inverted red colloidal quantum dot light-emitting diodes, finding that hole mobility and energy level difference are crucial factors for achieving high luminance and efficiency. Among the six different hole transport layer structures considered, the device with a single 4,4'-bis(carbazole-9-yl)biphenyl layer as a hole transport layer exhibited the best performance, achieving a peak efficiency of 5.56%.
SCIENCE OF ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
I. K. M. Reaz Rahman, Shiekh Zia Uddin, Matthew Yeh, Naoki Higashitarumizu, Jongchan Kim, Quanwei Li, Hyeonjun Lee, Kyuho Lee, Hoyeon Kim, Cheolmin Park, Jaehoon Lim, Joel W. Ager III, Ali Javey
Summary: In this study, a metal-oxide-semiconductor capacitor based on CdSe/CdS quantum dot thin films was used to investigate the influence of background charge on the luminescence efficiency and lifetime. By applying a gate voltage, the concentration ratio of charged and neutral quasiparticles in the quantum dots can be controlled, leading to modulation of the photoluminescence intensity and effective lifetime. The findings have potential applications in voltage-controlled electrochromics.
Article
Chemistry, Multidisciplinary
Daria D. Blach, Victoria A. Lumsargis, Daniel E. Clark, Chern Chuang, Kang Wang, Letian Dou, Richard D. Schaller, Jianshu Cao, Christina W. Li, Libai Huang
Summary: This study investigates the coherence of excitons in perovskite quantum dot solids by measuring the temperature-dependent photoluminescence line width and lifetime. The results show that excitons can coherently spread over three quantum dots in a superlattice, leading to superradiant emission. However, scattering from optical phonons causes the loss of coherence at higher temperatures, resulting in exciton localization to a single quantum dot. Static disorder and defects limit exciton coherence at low temperatures.
Article
Multidisciplinary Sciences
Satyendra Nath Gupta, Ora Bitton, Tomas Neuman, Ruben Esteban, Lev Chuntonov, Javier Aizpurua, Gilad Haran
Summary: Plasmonic cavities can confine electromagnetic radiation to deep sub-wavelength regimes, allowing for strong coupling phenomena with individual quantum emitters. By studying scattering spectra and using interferometry, researchers observed Rabi splitting and non-classical emission in devices with semiconductor quantum dots, revealing complex interactions between bright and dark states. Model simulations based on an extended Jaynes-Cummings Hamiltonian explained the experimental findings, highlighting the potential of controlling quantum state dynamics through the coupling of quantum emitters to plasmonic cavities.
NATURE COMMUNICATIONS
(2021)
Article
Nanoscience & Nanotechnology
Yunmi Cha, Hwi Je Woo, Sang Hyun Yoon, Young Jae Song, Young Jin Choi, Seong Heon Kim
Summary: In this study, the degradation phenomena of a QLED device induced by a high electric field were systematically analyzed using scanning probe microscopy and transmission electron microscopy. The experiments showed that a high electric field can cause mechanical degradation of the QLED device and significant changes in work function. In addition, indium ions migrate from the indium tin oxide bottom electrode to the top of the QLED device, and the ITO bottom electrode also deforms significantly, inducing variation in work function. The systematic approach adopted in this study provides a suitable methodology for investigating degradation phenomena in various optoelectronic devices.
Review
Chemistry, Physical
Zhe Shi, Hongqiao Zhang, Karim Khan, Rui Cao, Kaikai Xu, Han Zhang
Summary: Two-dimensional selenium, synthesized successfully in 2017, exhibits advanced properties including size-dependent bandgap, excellent environmental robustness, strong photoluminescence effect, anisotropic thermal conductivity, and high photoconductivity, making it a promising candidate for various device applications.
Review
Physics, Multidisciplinary
Xiao-Hui Li, Yi-Xuan Guo, Yujie Ren, Jia-Jun Peng, Ji-Shu Liu, Cong Wang, Han Zhang
Summary: In this paper, the progress of narrow-bandgap materials in terms of nonlinear optical properties, band structure, preparation methods, and applications is reviewed. These materials exhibit strong nonlinear absorption characteristics when interacting with short pulse lasers, leading to optical limiting or saturable absorption. Some of these materials have been utilized for generating ultrashort pulses.
FRONTIERS OF PHYSICS
(2022)
Article
Chemistry, Analytical
Li Su, Sainan Qin, Yexi Cai, Liang Wang, Wenpei Dong, Guojiang Mao, Suling Feng, Zhongjian Xie, Han Zhang
Summary: Nanozymes offer stability and cost-effectiveness, but often lack substrate selectivity and activity in non-acidic environments. The study introduced CoNCDs with peroxidase-like activity, leading to a efficient multi-mode sensing platform for detecting analytes in solution and serum samples. The CoNCDs demonstrated improved performance, biocompatibility, and photostability, making them suitable for in vivo monitoring of H2O2 levels.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Review
Materials Science, Multidisciplinary
Hui Li, Dongdong Liu, Karim Khan, Jian Shao, Xiaosong Liu, Rui Cao, Chunyang Ma, Fali Chong, Ayesha Khan Tareen, Feng Hu, Maofei Mei, Yan Sun, Daoxiang Teng, S. Wageh, Ahmed A. Al-Ghamdi, Zhe Shi, Han Zhang
Summary: This review investigates recent progress in the development of 2D MOFs for photonic applications, including their synthesis methods, properties, and photonic device applications. The article introduces the wide range of applications of 2D MOFs in energy, catalysis, and optoelectronic fields, and proposes future research prospects and challenges.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Chemistry, Analytical
Hongyan Yang, Yunzheng Wang, Zian Cheak Tiu, Sin Jin Tan, Libo Yuan, Han Zhang
Summary: All-optical systems are highly demanded in photonics technologies, and new two-dimensional materials have shown great potential in tailoring their optical properties for different applications. This review provides an overview of different types of 2D materials, their fabrication processes, and optical properties. The recent advances in all-optical modulation based on 2D materials are also summarized, along with perspectives and challenges for future development.
Article
Electrochemistry
Beibei Zhu, Dong An, Zhaoshun Bi, Wen Liu, Wei Shan, Yonghai Li, Guohui Nie, Ni Xie, Omar A. Al-Hartomy, Ahmed Al-Ghamdi, Swelm Wageh, Wen Chen, Xichang Bao, Xiang Gao, Han Zhang, Meng Qiu
Summary: In this study, a sensor for highly sensitive H2O2 detection was developed using N-doped MXene and three-dimensional flower-like silver nanoparticles. The results showed that the catalytic activity of metal nanozymes is influenced by both the substrate and the materials.
Article
Nanoscience & Nanotechnology
Chun-Yu Song, Hua-Long Chen, Yong-Jie Wang, Liang Jin, Ying-Tian Xu, Lin-Lin Shi, Yong-Gang Zou, Xiao-Hui Ma, Yu-Feng Song, Cong Wang, Ya-Ting Zhang, Ja-Hon Lin, He Zhang, Han Zhang, Jian-Quan Yao
Summary: In this study, a one-dimensional asymmetric photonic crystal with defect layer (1D-APCDL) was designed as a novel saturable absorber for high-repetition frequency ultrashort pulse fiber lasers. By using Bi1.6Sb0.4Te3 with high modulation depth as the defect layer, a harmonic pulse with the highest repetition frequency to date was achieved. This research provides a new saturable absorber solution and offers a new idea for the application of material-based nonlinear optical chips in high-repetition frequency ultrashort pulse fiber lasers.
Article
Nanoscience & Nanotechnology
Feng Zhang, Rui Cao, Zhongjun Li, Siyan Gao, Hualong Chen, Jia Guo, Yule Zhang, Bashaer Omar Al-Amoudi, Swelm Wageh, Ahmed A. Al-Ghamdi, Xi Zhang, Han Zhang
Summary: In this study, the origin of the broadband optical response of Ti3C2T x MXene is revealed through transient spectroscopic analysis. The unique optoelectronic character and photodetection capability of this material make it significant in exploring MXene-based optoelectronic devices.
Review
Chemistry, Multidisciplinary
Min Wu, Yuanliang Zhou, Han Zhang, Wugang Liao
Summary: With the rapid development of electronic devices, there is a need to develop efficient thermal dissipation materials to address the challenges of heat accumulation. Thermally conductive polymer composites have wide applications but require solutions for mass production of BNNS and structural design of composites.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Zhongquan Xu, Yonghong Zeng, Fanxu Meng, Shan Gao, Sidi Fan, Yi Liu, Yule Zhang, Swelm Wageh, Ahmed A. Al-Ghamdi, Jing Xiao, Zhinan Guo, Han Zhang
Summary: This study demonstrates the potential of MAPbBr(3) single crystal thin film/MoS2 vertical heterostructure in high-performance photovoltaic devices. The device exhibits high power conversion efficiency and responsivity, paving the way for research on self-powered photodetectors.
ADVANCED MATERIALS INTERFACES
(2022)
Review
Chemistry, Multidisciplinary
Rui Cao, Sidi Fan, Peng Yin, Chunyang Ma, Yonghong Zeng, Huide Wang, Karim Khan, Swelm Wageh, Ahmed A. Al-Ghamd, Ayesha Khan Tareen, Abdullah G. Al-Sehemi, Zhe Shi, Jing Xiao, Han Zhang
Summary: This article summarizes the recent progress and potential of 2D materials in mid-infrared optoelectronic devices. The limitations of graphene are mentioned. The authors believe that research on 2D materials beyond graphene will soon emerge and make a positive contribution to the commercialization of nanodevices.
Article
Materials Science, Multidisciplinary
Tianzhong Li, Jinyong Wang, Tongkai Chen, Swelm Wageh, Ahmed A. Al-Ghamdi, Jiangtian Yu, Zhongjian Xie, Han Zhang
Summary: In this study, a drug formulation based on lactic acid bacteria (LAB) was developed to produce reactive oxygen species (ROS) in tumors and induce host immunity. The LAB were modified with zeolitic imidazolate framework-67 (ZIF-67) and effectively delivered into tumor cells, leading to the generation of ROS upon light exposure. The bacterial hybrid induced tumor shrinkage through photodynamic therapy and stimulated inflammation to attract immune cells for cancer elimination.
SCIENCE CHINA-MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Dapeng Huang, Fei Liang, Ruiqi Guo, Dazhi Lu, Jiyang Wang, Haohai Yu, Huaijin Zhang
Summary: In this study, the broadband self-trapped exciton (STE) states are demonstrated for the first time in Mo-vacancy-rich MoSi2N4 films. The modulation effect of STE states on nonlinear optical processes is verified, which opens up new possibilities for the construction of novel devices and practical applications.
ADVANCED OPTICAL MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Jing Zou, Jing Wu, Yizhou Wang, Fengxia Deng, Jizhou Jiang, Yizhou Zhang, Song Liu, Neng Li, Han Zhang, Jiaguo Yu, Tianyou Zhai, Husam N. Alshareef
Summary: 2D carbides and nitrides of transition metals, known as MXenes, are a new class of 2D nanomaterials that show excellent performance and broad application prospects in various fields. However, their surface functional groups are difficult to control due to the exposure of metal atoms and implanted ions during the extraction process. By adding synergistic additives under non-hazardous conditions, stable and efficient MXene-based materials with exceptional optical, electrical, and magnetic properties can be obtained.
CHEMICAL SOCIETY REVIEWS
(2022)
Article
Optics
Leiming Wu, Taojian Fan, Songrui Wei, Yijun Xu, Ye Zhang, Dingtao Ma, Yiqing Shu, Yuanjiang Xiang, Jun Liu, Jianqing Li, Krassimir Panajotov, Yuwen Qin, Han Zhang
Summary: The Kerr nonlinearity in 2D nanomaterials is important for optical processing and modulation.
OPTO-ELECTRONIC ADVANCES
(2022)
