ETRI develops 'Eco-friendly Color thin film Solar cell'
The world's first 'Solar cell conversion efficiency improvement mechanism' was also identified
Written by : Min-Woo Lee. Journalist.
While research on solar cells to secure new and renewable energy sources is intensifying, domestic researchers have succeeded in implementing color solar cells that will add
beauty to the urban environment. This is expected to enable various applications of'solar
without additional process or cost to the existing dark-colored solar cells. ), a compound consisting of Cu(In,Ga)Se2] thin film solar cell.
In addition, optical pumping (operation method in which light is irradiated to atoms or
ions to excite from low energy to high state) terahertz spectroscopy (a very high
frequency terahertz is irradiated to a substance and It is said that the world's first
explanation of the efficiency improvement mechanism was possible using the method of measuring properties.
◆ 'CIGS thin film solar cell' manufacturing method
electrical energy, and are manufactured by stacking CIGS in a thin film on a glass
absorption rate and the highest energy conversion efficiency and good stability. In
addition, raw material consumption is lower than that of silicon-based solar cells, and
process and material costs are also lower.
containing cadmium, which is a harmful heavy metal, is used as a buffer layer (a role to
mitigate the difference in lattice constant and band gap between the transparent
conductive layer and the absorbing layer).
(the ratio of conversion from sunlight to electric energy) of about 18% by using a material containing zinc (Zn) that is harmless to the human body as a substitute for cadmium
sulfide (CdS). Is expected to be partially resolved.
adjusting the thickness of the thin film constituent layer by focusing on the interference of light that appears as a rainbow of oil bands floating on the water.
manufactured in a form that can be bent or folded, it is expected to be used as a
next-generation eco-friendly energy source, such as attaching it to a building window.
accurately determine the cause of the phenomenon that the conversion efficiency
increases as the solar cell is exposed to sunlight for a long time.
At this time, the researchers measured the motion of the electric charge in the solar cell
that was excited after light pumping using light pumping terahertz spectroscopy (atoms or molecules accept energy from the outside and move to a higher energy state).
The direct principle of improving efficiency while deriving (time constant) was explained
for the first time in the world. As ETRI developed a new analysis method, it suggested the possibility of further enhancing the technology for manufacturing eco-friendly
high-efficiency solar cells.
◆ It is expected to contribute to urban solar power generation
apply eco-friendly color CIGS thin film solar cell manufacturing technology to solar
modules, urban building construction materials, and mobile or portable devices.
modern society where the supply and demand of electricity is unbalanced, securing the
next generation of renewable energy sources has become very important. We will lead the development of thin-film solar cell technology to prepare for the future society and
contribute to securing an eco-friendly future energy source.”
High-Performance Flexible Inorganic Thin Film Solar Cell Source Technology for Urban
Distributed Power Supply』 by the Ministry of Science and Technology Information and
Communication KAIST, Yonsei University, and POSTECH contributed to the research based on ETRI's original semiconductor and display technology.
The first author of the thesis is Senior Researcher Dae-Hyung Cho and Senior Researcher Woo-jung Lee, and the corresponding author is Senior Researcher Yong-Duk Chung.
<Copyright ⓒ World Lighting News>
<저작권자 ⓒ 월드라이팅뉴스 무단전재 및 재배포 금지>
NEWS 많이 본 기사