Results 131 to 140 of about 23,878 (272)

Investigation of the Blueshift in Electroluminescence Spectra from MOCVD Grown InGaAs Quantum Dots

, 2016
The electroluminescence of a quantum-dot (QD) laser diode was found to blueshift as the injection current is increased. The carrier distribution within the QD layers was modeled and the Stark shift, measured from photocurrent, was used to explain the ...
Lever McGowan, Penelope, Jagadish, Chennupati, Tan, Hark Hoe, Buda, Manuela   +3 more
core   +1 more source

Tailoring hot‐exciton emitter via an accelerated reverse intersystem crossing process for deep‐blue organic light‐emitting diodes with an external quantum efficiency approaching 16% at 1000 cd m−2 and a CIEy of 0.027

FlexMat, EarlyView.
A tailor‐made deep‐blue emitter with an accelerated process with a rate of 4.4 × 109 s−1 achieves a deep‐blue organic light‐emitting diodes with external quantum efficiency of 15.7% at a practical brightness of 1000 cd m−2 with an extremely small CIEy coordinate of 0.027. Abstract Achieving high‐efficiency, saturated‐color, and stable deep‐blue organic
Jingli Lou, Baoxi Li, Yichao Chen, Han Zhang, Dezhi Yang, Ben Zhong Tang, Zhiming Wang   +6 more
wiley   +1 more source

Spatiotemporal engineering of dynamic color in alternating‐current‐driven light‐emitting devices

FlexMat, EarlyView.
This review presents a mechanism‐driven framework for spectral tuning in alternating‐current‐driven light‐emitting devices, systematically integrating emissive center engineering, device architecture design, and driving signal modulation. By linking microscopic carrier dynamics and electric‐field‐charge interactions with macroscopic spectral evolution,
Yuyue Yang, Chenhao Li, Jinyang Li, Fanglong Yuan   +3 more
wiley   +1 more source

Recent advances in chiral organic room‐temperature phosphorescence with circularly polarized luminescence

FlexMat, EarlyView.
This review systematically summarizes representative recent advances in organic circularly polarized room‐temperature phosphorescence materials toward optoelectronic and information security applications. Abstract Circularly polarized room‐temperature phosphorescence (CPRTP) materials combine the dual advantages of long‐lived triplet emission and ...
Liang Zhang, Ming‐Jun Ji, Chuan‐Feng Chen   +2 more
wiley   +1 more source

Degradation Mechanism and Stabilization Strategies for Large‐Area Perovskite Solar Modules

Interdisciplinary Materials, EarlyView.
This review summarizes the degradation mechanisms specific to perovskite solar modules, focusing on large‐area fabrication and uniformity‐related degradation, cell interconnection and degradation related to scribe processing, device encapsulation, reverse‐bias degradation and potential‐induced degradation, and outlines corresponding mitigation ...
Peng Xu, Xinzhu Li, Xuezheng Liu, Xinyu Zhao, Jinzhan Cheng, Wanlin Guo, Xiaoming Zhao   +6 more
wiley   +1 more source

Wearable photovoltaic textiles: From device technologies to long‐term reliability

InfoScience, EarlyView.
Wearable photovoltaic textiles are highlighted as reliable energy sources that combine solar cell efficiency with hierarchical textile‐specific mechanical and environmental durability. Structural and encapsulation strategies, including planarization, neutral‐axis engineering, and advanced barrier designs, enable waterproofing, washability, UV shielding,
Eun Gyo Jeong, So Yeong Jeong, Yongmin Jeon, Myung Sub Lim, Seo‐Yoon Bae, Sung‐Min Lee   +5 more
wiley   +1 more source

Study of early electrical aging of polyethylene using electroluminescence technique

, 2003
Electroluminescence is defined as light emission resulting from the application of an electrical field to solid state materials.  Electroluminescence has been used to study charge injection and recombination phenomena and its use as a probe to study ...
Wong, Kiing Ing
core  

Origin, verification, and device‐level impacts of p‐doping in two‐dimensional transition metal dichalcogenides

InfoMat, EarlyView.
This review provides a comprehensive perspective on p‐doping in two‐dimensional transition metal dichalcogenides, linking the origins of carrier polarity, doping mechanisms, verification methodologies, and device‐level impacts. By establishing correlations among atomic‐scale doping, carrier modulation, and device functionality, it offers practical ...
Seo Yeon Han, Hye In Choi, Ji Yeon Kim, Wenhu Shen, Yong Soo Cho   +4 more
wiley   +1 more source

Multispectral Mid‐Infrared Imaging With Incoherent Light via Adiabatic Upconversion

Laser &Photonics Reviews, EarlyView.
We demonstrate room‐temperature broadband MIR imaging based on adiabatic frequency upconversion, driven by a Q‐switched pump laser and incoherent illumination. The small‐foot‐print system upconverts the spectral range to the visible domain, without scanning, thermal control and with spatial resolution below 20μm$20\mathrm{\mu}\mathrm{m}$.
Daniel Beitner, Ziv Abelson, Eyal Hollander, Omri Meron, Haim Suchowski   +4 more
wiley   +1 more source

Electroluminescence from Ge on Si substrate at room temperature

, 2009
A Ge/Si heterojunction light emitting diode with a p(+)-Ge/i-Ge/N+-Si structure was fabricated using the ultrahigh vacuum chemical vapor deposition technology on N+-Si substrate. The device had a good I-V rectifying behavior.
Xue HY, Bai AQ, Cheng BW, Su SJ, Yu YD, Hu WX, Xue CL, Wang QM, Luo LP, Cheng BW Chinese Acad Sci Inst Semicond State Key Lab Integrated Optoelect Beijing 100083 Peoples R China. E-mail Address: cbw@semi.ac.cn   +9 more
core