Results 81 to 90 of about 8,462 (239)

Spatially Confined/Ligand‐Directed Ultrabright NIR‐AIE Nanoprobe for In Vitro Rapid Detection and In Situ Imaging of Bacterial Septic Arthritis

Advanced Science, EarlyView.
Inorganic PbS quantum dots spatially confine AIEgens and enable cooperative luminescence within a ligand‐directed core–shell–shell nanoassembly, generating ultrabright NIR PPANPs with enhanced fluorescence and photothermal performance. The platform enables 10‐min S.
Yujian Li, Jia Shu, Sijia Lv, Leilei Qin, Xuefeng Luo, PengCheng Xiao, Huan Cai, Xin Gao, Yan Zhao, Haotian Zhou, Yaji Yang, Zhenglin Zhu, Shijia Ding, Juan Li, Rui Chen, Wei Huang   +15 more
wiley   +1 more source

Carrier Excitation Energies from a QD to OCL, RMS of Relative QD-Size Fluctuations and Temperature Dependence of QDL

مجلة علوم ذي قار, 2019
In this work, we study the characteristic temperature of a quantum dot laser (QDL) in presence of internal optical loss and quantum efficiency. The control parameters (the constant component of internal loss coefficient, effective cross section, carrier
R. M. Hassan
doaj   +4 more sources

Bandwidth enhancement in SWIR QD photodetectors via interfacial trap suppression using polymer capping layers

Materials & Design
Lead chalcogenide quantum dot (QD) photodetectors have attracted considerable attention due to their high specific detectivity, process compatibility on Si circuitry enabling monolithic integration, adjustable bandgap in short-wavelength infrared (SWIR ...
Junyoung Jin, Tae Hwan Park, Kyeong-Seok Lee, Jaewook Kim, Jongkil Park, Tae-Yeon Seong, Gyu Weon Hwang   +6 more
doaj   +1 more source

Electron Transport in Quantum Dot Light‐Emitting Diodes

Advanced Electronic Materials, EarlyView.
This work reveals that electron transport in core/multi‐shell quantum dots is severely hindered by traps located at the core‐shell interface. These traps follow a Gaussian energy distribution with a density of approximately 1023 m−3 and a common energy level of 4.0 eV below the vacuum level.
Shuxin Li, Wenxin Lin, Min Zheng, Xiongfeng Lin, Yulin Guo, Longjia Wu, Quan Niu, Paul W. M. Blom, Yuguang Ma   +8 more
wiley   +1 more source

Chirped InAs/InP quantum dot material platform enabling ultra-broad spectral tuning in external cavity lasers

AIP Advances
We demonstrate a novel ultra-broadband tunable InAs/InP quantum dot (QD) external-cavity laser incorporating a chirped multilayer QD active region.
Hengbo Sun, Lijun Hao, Yong Zhao
doaj   +1 more source

Scheme for generation of three-photon entangled W state assisted by cross-Kerr nonlinearity and quantum dot

Scientific Reports, 2019
We represent an optical scheme using cross-Kerr nonlinearities (XKNLs) and quantum dot (QD) within a single-sided optical cavity (QD-cavity system) to generate three-photon entangled W state containing entanglement against loss of one photon of them.
Jino Heo, Changho Hong, Seong-Gon Choi, Jong-Phil Hong   +3 more
doaj   +1 more source

Tailoring Quantum Dot Shell Thickness and Polyethylenimine Interlayers for Optimization of Inverted Quantum Dot Light-Emitting Diodes

Photonics
Quantum dot light-emitting diodes (QLEDs) hold great promise for next-generation display applications owing to their exceptional optical properties and versatile tunability.
Ahmet F. Yazici, Sema Karabel Ocal, Aysenur Bicer, Ramis B. Serin, Rifat Kacar, Esin Ucar, Alper Ulku, Talha Erdem, Evren Mutlugun   +8 more
doaj   +1 more source

Quantum dot sensitized solar cell design with surface passivized CdSeTe QDs

Solar Energy, 2020
Abstract One of the main factors affecting the performance of quantum dot sensitized solar cells (QDSSCs) is charge recombination caused by surface traps. It is important to passivize the surface traps of the synthesized QDs as much as possible in order to raise the power conversation efficiency (PCE).
openaire   +2 more sources

Strain‐Tunable Photoluminescence From Ge Quantum Dots on Si Nanotips for CMOS‐Compatible Photonics

Advanced Physics Research, EarlyView.
This work studies strain in Ge quantum dots grown on Si nanotips using photoluminescence, X‐ray diffraction, and band structure calculations. It shows how emission changes with dot size, evaluates strain in the dot and substrate, and explains the role of direct and indirect transitions in the optical behavior.
Diana Ryzhak, Johannes Aberl, Enrique Prado‐Navarrete, Lada Vukušić, Oliver Skibitzki, Petr Klenovský, Marvin Hartwig Zoellner, Markus Andreas Schubert, Moritz Brehm, Davide Spirito, Giovanni Capellini   +10 more
wiley   +1 more source

Perovskite Photodetectors at the Intelligence Frontier: From Tunable Materials to Adaptive Optoelectronic Systems

Carbon Energy, EarlyView.
This comprehensive review presents a progressive roadmap for perovskite vision detectors. Centered on perovskite‐based artificial perception, the graphic illustrates a systematic evolution: starting with fundamental material engineering and device architectures, advancing toward complex functional strategies such as flexible neuromorphic imaging ...
Chenglong Li, Wei Qu, Deepak Kumar, Naini Jain, Nur Wardina Syahirah binti Mohamad Fadil, Nur Najiha binti Ahmad Rasid, Emannuel Kymakis, Maria Vasilopoulou, Chunxiong Bao, Feng Gao, Peng Gao, Sanjeev Kumar Sharma, Mohammad Khaja Nazeeruddin, Abd. Rashid bin Mohd Yusoff, Haotong Wei   +14 more
wiley   +1 more source