Electricity battery is a thin film electro -optic device with a simple structure.Its luminous layer only requires one layer and needs to be sandwiched between the anode and cathode of the air.
The use of high energy and low cost preparation methods can also make large -scale light -emitting electrochemical batteries.The base of the emitting electrochemical battery can be hard materials such as glass or flexible materials such as plastic and textiles.
These advantages give the optoelectronics chemical battery with extensive application potential, including lighting, medical care, and signs.
However, designing high -efficiency and high brightness of light -emitting electrochemical batteries still face such a challenge: its luminous efficiency will decrease with the increase of the drive current density."Efficiency rolling".
So how to solve this problem?Recently, a scientific research team proposes a method that can separate and quantify the main efficiency loss factor, which can also be separated and quantified output coupling efficiency and quenching.
In the study, the P-N doped structure of the P-N knot-doping structure emitted by a single-line radio chemochemical battery was measured with the drive current density, and they measured.
(Source: Advanced Materials)
The corresponding output coupling efficiency will also change.After the quantitative output coupling efficiency, the change caused by the growth of the excitement can also be quantified.
Then, they verify this law: the high-concentration electrochemical doping in the light-emitting electrochemical battery will lead to a single-line-polarized child quenching, which occurs at lower driversUnder current density.
At the same time, it will also cause a single-line-polarized child to quench, far exceeding the single-line-single-line state quenching, so that the single-line-polarized child quenching significantly promotes efficiencyRoll.
This method of deciphering optoelectronic chemical battery efficiency will help design high -efficiency and high brightness of light -emitting electrochemical batteries.
For example, the maximum external quantum efficiency can be achieved by using pulse current to drive the optoelectronic chemical battery.The reason is that pulse current can inhibit the polarized sub-concentration in the P-N junction area.
In addition, when designing the optoelectronic chemical battery, it is necessaryChemical battery.
Recently, the relevant papers were issued on Advanced Materials [1] with the title of "Efficiency of Overlapping Electrochemical Battery" and "" and "".
Zhang Xiaoying, a doctoral student at Sweden at Moao University, is the first author, and Sweden professor at Moao University, Ludwig Edman () as a communication author.
Figure | Related papers (Source: Advanced Materials)
In the next step, they plan to study the laws of changes in the width of the P-N knot with the current density.Therefore, it is necessary to upgrade the current representation device, and then obtain the peak and width of the P-N junction area.
After getting these values, more complex model analysis and data analysis also need to be needed.After that, they also planned to use pulse current to drive the optoelectronic chemical battery to explore whether the concentration of polarization was improved to improve external quantum efficiency.
Figure | Zhang Xiaoying (Source: Zhang Xiaoying)
Zhang Xiaoying, a author, graduated from Shanxi University undergraduate. At the fourth year, he came to Sweden to exchange for one year with the funding of the Geori project of Shanxi University.Later, her masters degree and doctoral degree were studying at Ormer University. At present, she is a doctoral student at school.
The road to studying in foreign countries is not easy. During the study abroad, there is a high -level laser system and technology courses. Many contents are more difficult to understand. Zhang Xiaoying is very difficult to learn.So there is no papers for the first exam.
After the class, the teacher who had the courage to ask the lecture said, "I want to learn this lesson better, can I ask when there is a problem?
The teacher is a professor and led a whole research group. He is very busy. I think I may refuse, because when I asked another teacher, the other party said that it was very busy.Its okay, and after that, I asked a lot of questions many times, and I got patient explanations. "
Although sometimes there are language barriers, the teacher is particularly patient."After that, the teacher also provided me with the opportunity to do it. During the period of countless times with complex instruments, the teacher would tell me that this is the process of research: Re-search, that is, exploration over and over again!" Zhang Xiaoyingexpress.
The research experience during the masters degree has laid a solid foundation for Zhang Xiaoyings continued reading.During the doctorate research process, Zhang Xiaoying felt the importance of self -study, boldly expressed their views, actively participated in discussion, and insisted on the end. Some good ideas were burst into the process of everyones discussion.
Fortunately, she did not disappoint the training and dedication of the teachers.At present, she has published several papers and two papers in journals and other journals such as Optics Letters, Advanced Materials.
Reference Data:
1.x. ZHANG, J. Ràfols-Ribé, J. Mindemark, S. Tangh, E. Gracia-Espino, C. Larsen, L. EDMAN, EFFICIENCY ROLL-OFF in Light-Emitting ElectroChemical Cells. Adv. 2024, 2310156.
Layout:He Chenlong
01/
02/
03/
04/
