Results 51 to 60 of about 2,168 (231)

When Poor Exciton Dissociation Limits Photocurrents in Organic Solar Cells: Why Low Offset Non‐Fullerene Acceptor Blends Can't Be Efficient

Advanced Materials, EarlyView.
The energetic offset between the donor and the acceptor components in organic photoactive layers is central to the tradeoff between photovoltage and photocurrent losses. This Perspective covers the most important issues surrounding this topic in non‐fullerene acceptor blends, from the difficulty of accurately determining state energies and driving ...
Dieter Neher, Manasi Pranav
wiley   +1 more source

Mechanical integrity of photovoltaic panels under hailstorms: Mono vs. poly-crystalline comparison

Heliyon
The performance of Photovoltaic (PV) modules heavily relies on their structural strength, manufacturing methods, and materials. Damage induced during their lifecycle leads to degradation, reduced power generation and efficiency.
Hafiz Basit Ali, Muhammad Ali Kamran, Rizwan Mahmood Gul, Muhammad Yasir, Fadhel T. Alabdullah, Chaudhry Usman, Adnan Tariq   +6 more
doaj   +1 more source

End‐to‐End Sensing Systems for Breast Cancer: From Wearables for Early Detection to Lab‐Based Diagnosis Chips

Advanced Materials Technologies, EarlyView.
This review explores advances in wearable and lab‐on‐chip technologies for breast cancer detection. Covering tactile, thermal, ultrasound, microwave, electrical impedance tomography, electrochemical, microelectromechanical, and optical systems, it highlights innovations in flexible electronics, nanomaterials, and machine learning.
Neshika Wijewardhane, Lyn I. Jones, Richard M. Martin, Helen Winter, Faezeh Arab Hassani   +4 more
wiley   +1 more source

On the temperature dependence of the efficiency of electroluminescence

, 2019
| openaire: EC/H2020/638173/EU//iTPXElectroluminescent cooling (ELC) of light-emitting diodes (LEDs) generally requires very high light emission efficiency.
Sadi, Toufik, Jani Oksanen, Ivan Radevici, Oksanen, Jani, Toufik Sadi, Casado, Alberto, Alberto Casado, Radevici, Ivan   +7 more
core   +1 more source

Aluminum Oxynitride‐Engineered Transparent Aluminum Nitride Resistive Memory for Low‐Leakage Multilevel Switching in Micro‐LED Pixels

Advanced Materials Technologies, EarlyView.
An AlON interfacial layer is engineered within an AlN switching layer to enable transparent RRAM with four stable resistance states. The device achieves low‐voltage multilevel switching and a high HRS, allowing precise grayscale modulation and preventing light leakage in micro‐LEDs operated at VDD = 2.7 V.
Sung Keun Choi, Ho Jin Lee, Seok Hee Hong, Jae Seong Park, Chan Ho Ryu, Kyeong Heon Kim, Tukaram D. Dongale, Tae Geun Kim   +7 more
wiley   +1 more source

Electrical inspection mark of UHV transmission line based on GaN material

工程科学学报, 2018
At present, the traditional insulated pole electroscope is used for electrical inspection in high-voltage transmission lines. However, when it is used in ultra-high voltage (UHV) transmission lines, the length of its insulated rod is large, and there are
CHEN Kang, WANG Li-nong, LI En-wen, SONG Bin, FANG Ya-qi, LI Xiao-chun, CHEN Tian-zhu, JIAN Si-liang   +7 more
doaj   +1 more source

Aerosol Jet Printed Polymer‐Free High Aspect Ratio Quantum Dot Films for Enhanced Color Conversion

Advanced Optical Materials, EarlyView.
Polymer‐free quantum dot color conversion layers are aerosol jet printed at high aspect ratio by tuning the aerosol focus ratio to induce in‐flight droplet drying. Contact‐line pinning suppresses lateral spreading, enabling ∼10 µm‐thick films at ∼50 µm widths with blue light leakage below 0.25% and conversion efficiency approaching 18%, demonstrated ...
Sukyung Choi, Anna Meredith, Hyunsu Cho, Zahra Bahrami, Kevin Schnittker, Joseph Andrews   +5 more
wiley   +1 more source

Electrical Properties and Reliability of AlGaN/GaN High Electron Mobility Transistor under RF Overdrive Stress at High Temperature

Micromachines
We have investigated the electrical properties and reliability of AlGaN/GaN high electron mobility transistors (HEMT) under high-temperature RF overdrive stress.
Chang Liu, Yiqiang Chen, Yuhan Xie, Hongxia Liu, Zongqi Cai   +4 more
doaj   +1 more source

Nondestructive characterization of solar PV cells defects by means of electroluminescence, infrared thermography, I–V curves and visual tests: Experimental study and comparison

Energy, 2020
Abstract Photovoltaic (PV) modules are the core of every PV system, representing the power generation and their operation will affect the overall plant performance. It is one of the elements within a PV site with the higher failure appearance, being essential their proper operation to produce reliable, efficient and safety energy.
Gallardo-Saavedra, Sara, Hernández Callejo, Luis, Alonso-Garcia, Carmen, Morales, José Ignacio, Santos Rodriguez, Jose Domingo, Alonso Gómez, Víctor, Moreton, Angel, González Rebollo, Miguel Ángel, Martínez, Oscar   +8 more
openaire   +2 more sources

ELECTROLUMINESCENCE INVESTIGATION ON THIN FILM MODULES

, 2020
: The fast market growth during the recent years led to huge amounts of production capacities and a large variety of module types. The increasing need for cost reductions obliges the manufacturers to maximize production and module efficiencies ...

core