Solar Energy
Advances in femtosecond laser micromachining of halide perovskites
Advances in femtosecond laser micromachining of halide perovskites
by Simon Mansfield
Sydney, Australia (SPX) Sep 25, 2024
Halide perovskite materials are increasingly recognized for their potential in fields such as information storage, lasers, anti-counterfeiting, and planar lenses, thanks to their unique optoelectronic properties. A critical challenge in utilizing these materials has been achieving high-precision, high-quality patterning. This challenge has hindered advancements in various practical applications.
A review article titled “Advances in Femtosecond Laser Synthesis and Micromachining of Halide Perovskites” was recently published by Professor Lin Ma’s team from Guangdong University of Technology in ‘Light: Advanced Manufacturing’. The article, co-authored by master’s student Shijie Du and Professors Fangteng Zhang and Lin Ma, provides a comprehensive overview of femtosecond laser-induced perovskite precipitation and micromachining. It discusses the unique benefits of this technology and the future potential of femtosecond lasers in perovskite material applications.
Recent years have seen considerable progress in femtosecond laser technology within materials science, particularly in synthesizing and micromachining halide perovskite materials. Known for their exceptional optoelectronic properties, perovskite materials are widely used in a variety of sectors. However, precise and high-quality patterning remains essential to unlocking the full potential of these technologies.
Femtosecond lasers, with their ultrashort pulse width and high peak power, have demonstrated remarkable capabilities in processing precision and material flexibility. This technology has become integral to perovskite material processing, enabling more stable and adaptable applications across various fields. The precipitation of perovskites induced by femtosecond lasers in glass has significantly improved material stability, making it possible to explore new applications.
In particular, femtosecond laser-induced perovskite precipitation technology has shown promise in areas like anti-counterfeiting and information storage. Researchers have achieved three-dimensional optical data storage and encryption using perovskite materials, offering advantages such as enhanced security, fast response times, and ease of use. Additionally, femtosecond laser processing holds great promise for applications in optical displays, micro-LEDs, and holographic displays.
As femtosecond laser methods continue to improve, future research will focus on further advancing perovskite materials in optical storage, high-density data storage, and other optoelectronic fields. These ongoing developments will not only result in more efficient material processing technologies but also expand possibilities for future information technology innovations.
Research Report:Advances in femtosecond laser synthesis and micromachining of halide perovskites
Related Links
Changchun Institute of Optics, Fine Mechanics and Physics
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DGIST enhances quantum dot solar cell performance
by Riko Seibo
Tokyo, Japan (SPX) Oct 04, 2024
A research team led by Professor Jongmin Choi from the Department of Energy Science and Engineering at DGIST, in collaboration with Gyeongsang National University’s Professor Tae Kyung Lee and Kookmin University’s Professor Younghoon Kim, has developed a new method that significantly boosts the performance and longevity of perovskite quantum dot solar cells. Their innovative approach addresses a key issue: surface distortions on quantum dots that hinder solar cell efficiency.
Perovskite quantum dots are widely regarded as essential for next-generation solar cells due to their high light-to-electricity conversion efficiency and scalability. However, the process of replacing the “ligands” on their surface often causes distortions, akin to crumpled paper, that degrade solar cell performance.
The research team tackled this problem by introducing short ligands that firmly grip both sides of the quantum dots. This method effectively restores the quantum dot’s distorted surface, resembling the process of flattening crumpled paper. By smoothing the surface, they significantly reduced defects and improved both the performance and the stability of the solar cells. The power conversion efficiency rose from 13.6% to 15.3%, and the cells maintained 83% of their performance over 15 days, marking a major advancement in solar cell technology.
“Through this research, we could minimize surface defects on the quantum dots and stabilize their surfaces by newly adopting these amphiphilic ligands, thereby significantly improving the efficiency and stability of the solar cells,” explained Professor Jongmin Choi. He also noted the team’s intention to extend this approach to other photoelectric devices in the future.
This study, a collaborative effort by DGIST, Gyeongsang National University, and Kookmin University, was supported by the National Research Council of Science and Technology, the DGIST R and D Program, and the New Faculty Research Foundation at Gyeongsang National University. The findings were published in the ‘Chemical Engineering Journal’ on September 15, 2024.
Research Report:Multifaceted anchoring ligands for uniform orientation and enhanced cubic-phase stability of perovskite quantum dots
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Philippines’ Marcos opens first EV battery plant
by AFP Staff Writers
Manila (AFP) Sept 30, 2024
President Ferdinand Marcos inaugurated on Monday the first factory for electric vehicle batteries in the Philippines, calling it the “future” of clean energy.
The Australian-owned lithium-iron-phosphate factory aims to produce two gigawatt-hours of batteries per year by 2030, powering about 18,000 electric vehicles or nearly half a million home battery systems.
“We have worked very hard and tried to do our best to bring this kind of technology to the Philippines with a clear recognition that this is the future,” Marcos said in a livestreamed speech.
“As the first manufacturing plant in the Philippines for advanced iron phosphate batteries… (it) sets the stage for the Philippines to become a player in clean energy storage in our part of the world.”
Located in New Clark city north of Manila, the StB Giga Factory Inc. facility will create 2,500 local jobs and channel five billion pesos ($89.2 million) into the economy each year, Marcos said.
The investment aligns with the government’s efforts to “transition our country to renewable energy”, and would help Manila “entice more investors in renewable energy facilities in the country”, he added.
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Fire breaks out at Chinese battery giant CATL plant
by AFP Staff Writers
Beijing (AFP) Sept 29, 2024
A fire broke out Sunday at a factory belonging to Chinese battery giant CATL, which supplies electric vehicle makers including Tesla, but only a “relatively small” impact on operations is expected, the company said.
A CATL spokesperson said no injuries or casualties had occurred at the plant in the coastal city of Ningde, and that “the reasons behind this accident are still under investigation”.
Emergency services were sent to the plant to fight the fire and to organise the evacuation of any people who were inside the 15,000 square metre (160,000 square feet) site, a statement by the Dongqiao Economic and Technological Development Zone said.
Firefighters were alerted to the blaze just before 11:30 AM local time (0330 GMT).
It was not immediately clear what was produced at the plant, CATL’s base in the eastern province of Fujian, but the company said the effect of the now extinguished fire would not be significant.
“The impact to CATL’s overall production operation is relatively small,” the spokesperson said.
Videos published by the Chinese business media outlet Cailianshe, and posted on the Weibo social network, showed parts of a large white building in flames with thick gray smoke rising into the air.
AFP could not immediately verify the authenticity of the images.
CATL was founded in 2011 and produces more than a third of the electric vehicle batteries sold worldwide for automakers that include Mercedes-Benz, BMW, Volkswagen, Toyota, Honda and Hyundai.
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