Results 51 to 60 of about 3,949 (198)

Enhanced Light Extraction of Flip-Chip Mini-LEDs with Prism-Structured Sidewall

Nanomaterials, 2019
Current solutions for improving the light extraction efficiency of flip-chip light-emitting diodes (LEDs) mainly focus on relieving the total internal reflection at sapphire/air interface, but such methods hardly affect the epilayer mode photons.
Bin Tang, Jia Miao, Yingce Liu, Hui Wan, Ning Li, Shengjun Zhou, Chengqun Gui   +6 more
doaj   +1 more source

InGaN Laser Diodes with Etched Facets for Photonic Integrated Circuit Applications

Micromachines, 2023
The main objective of this work is to demonstrate and validate the feasibility of fabricating (Al, In) GaN laser diodes with etched facets. The facets are fabricated using a two-step dry and wet etching process: inductively coupled plasma—reactive ion ...
Krzysztof Gibasiewicz, Anna Kafar, Dario Schiavon, Kiran Saba, Łucja Marona, Eliana Kamińska, Piotr Perlin   +6 more
doaj   +1 more source

Low Temperature Site‐Specific Pulsed Laser Annealing of MoS2

Small, EarlyView.
The application of laser pulses, of extremely short duration, is investigated as a potential new method to modify the atomic structure of ultrathin 2D materials for use in the creation of future electrical devices. The process is efficient, offering a site‐specific functionality, where regions of an electronic device that only requires annealing is ...
Nazar Farid, Aashi Gupta, Pavlina Metaxa, A Arifutzzaman, Hariprasad Kuduvan, Rahil Haria, Michele Conroy, Ian Campbell, Ageeth A Bol, James Connolly, Jun Lin, Ian Povey, Ray Duffy, Gerard M O'Connor   +13 more
wiley   +1 more source

Effect of pH, milling time, and Isobam content on porous silicon nitride ceramics prepared by gel casting

Advanced Powder Materials, 2023
As a non-toxic copolymer of isobutylene and maleic anhydride, Isobam is successfully used as a dispersant and a gelling agent for fabricating porous Si3N4 ceramics by gel casting.
Hailing Yang, Zhi Wang, Mengyong Sun, Fei Chen, Jun Ji, Sique Chen, Yingying Chen, Deli Ma, Zhenyu Zhang, Baocai Pan, Yulin Wei, Qinggang Li   +11 more
doaj   +1 more source

Mitigating Residual FAI for Air‐Stable FAPbI3 LEDs

Small, EarlyView.
Treating FAI‐rich FAPbI3 perovskite films with the multifunctional molecule DEAET, combining a protonated amine and a thiol group, effectively regulates residual surface organic‐halide species, suppresses non‐radiative recombination, and modifies interfacial energetics. The resulting near‐infrared perovskite LEDs achieve 14% external quantum efficiency
Spyros Orfanoudakis, Konstantina Yannakopoulou, Julia Morat, Leonidas Tsetseris, Polychronis Tsipas, Stefania Skorda, Alexandros El Sachat, Feng Gao, Athanassios G. Kontos, Thomas Stergiopoulos   +9 more
wiley   +1 more source

A Simple Texturization Approach for Mono-Crystalline Silicon Solar Cell with Low TMAH Concentration Solution

, 2011
Texturing for mono-crystalline silicon solar cell by chemical anisotropic etching is one of the most important techniques in photovoltaic industry. In recent years, tetramethylammonium hydroxide (TMAH) solution or a mixture of TMAH solution with IPA was ...
Min Liu, Jun Zhang, Yao Zhang, Hong Wei Diao, Lei Zhao, Wei Ying Ou, Hai Ling Li, Wen Jing Wang, Wei Ming Lu, Chun Lan Zhou   +9 more
core   +1 more source

Unraveling the Proton‐Induced Degradation Mechanism in Quantum‐Dots Light‐Emitting Diode for Space Applications

Small, EarlyView.
Low‐energy proton irradiation induces ligand detachment at the QD/ZnO interface in quantum‐dot light‐emitting diodes (QLEDs). The exposed ZnS surface interacts with ZnO defects, generating a high density of interfacial trap states that promote electron trapping, suppress charge injection, and accelerate non‐radiative recombination, ultimately leading ...
Chanwoo Lim, Tai Nguyen, Chanmin Kim, Darshpreet Kaur Saini, Todd A. Byers, Youngjo Choi, Bibhudutta Rout, Dong Hyun Kim, Jun Hong Noh, Soong Ju Oh, Taeyeon Kim, Jae‐Hyeon Ahn, Do Young Kim, Hyeonggeun Yu   +13 more
wiley   +1 more source

An improved TMAH Si-etching solution without attacking exposed aluminum

, 2001
In MEMS fabrication technology, it is often desirable to etch silicon substrate or polysilicon sacrificial layer after metallization is completed. Most of the etching solution would attack the aluminum.
Wang, YY, Sin, JKO, Hsing, I. Ming, Hsing, IM, Guizhen Yan, Sharma, RK, Chan, Philip C.H., Rajnish K. Sharma, Wang, Yangyuan, Johnny K.O. Sin, Sharma, Rajnish K., Philip C.H. Chan, Yangyuan Wang, Yan, Guizhen, Yan, GZ, I-Ming Hsing, Chan, PCH, Sin, Johnny K.O.   +17 more
core   +1 more source

Recent advances in polymeric chemically amplified positive resists: Materials and design strategies

Smart Molecules, EarlyView.
This review summarizes recent advances in the molecular design of positive chemically amplified resists, focusing on photoacid generators and polymer architectures. Key strategies for enhancing sensitivity—including self‐amplification effects, copolymerization of sensitive monomers, controlled polymerization, and photosensitized chemically amplified ...
Litao Zhou, Haoyuan Li, Jianhua Zhang, Hanshen Xin   +3 more
wiley   +1 more source

Systematic investigation of the diffraction efficiency of sub‐15 nm resolution soft X‐ray zone plates via simulation and measurement

Journal of Synchrotron Radiation, EarlyView.
This study presents systematic measurements and rigorous coupled‐wave analysis of relative and absolute diffraction efficiencies for sub‐15 nm soft X‐ray Fresnel zone plates. By decoupling intrinsic optical performance from practical beamline transmission losses, this work establishes a highly reliable metrology framework to support the development of ...
Qingyuan Mao, Yuchen Jiao, Liang Liu, Jingyuan Zhu, Li Jiang, Xiangzhi Zhang, Zhanshan Wang   +6 more
wiley   +1 more source