The research work has also been supported by the National Natural Science Foundation of China, the Advanced Science Center of Materials Biology and Dynamic Chemistry of the Ministry of Education, the Major Science and Technology Project of Shanghai, the Special Basic Research Zone of Shanghai, and the Joint Research Center of Feringa Nobel Prize Scientists.
This work innovatively introduces cyanophosphonic acid units, develops biparental small molecule hole transport materials, and constructs ordered, ultra-thin and surface ultra-infiltrated layers through dynamic self-assembly, which solves the two major problems of carrier transport and interface defect control in device applications with one stone.
Organic hole transport material is an important organic semiconductor material, which has achieved large-scale commercial applications in the fields of electrostatic copying, laser printing and organic light-emitting diodes,
and also plays an important role in new photovoltaic technologies, such as dye-sensitized solar cells, organic photovoltaic cells and perovskite solar cells. However, in the application of optoelectronic devices, organic hole transport materials still face many problems, the most prominent problem is that their low mobility characteristics limit the charge transport performance.
In order to solve the charge transport bottleneck problem of low mobility materials, the field mainly introduces "chemical doping" to improve the film conductivity, but the process is complicated,
difficult to prepare, poor reproducibility, and not conducive to the long-term stability of the device. After long-term research accumulation and a large number of experimental explorations,
Hually's team innovatively proposed the "anchoring self-assembly strategy" to effectively solve the two major problems of carrier transport and interface defect control.
The novel small molecule hole transport materials developed by the researchers have many advantages, such as anchoring, easy dissolution, easy processing, and super-wetting. The certification efficiency of the trans-structure perovskite solar cell prepared based on the new organic hole transport material reached 25.39% in the third party,
which is the highest certification efficiency of this type of solar cell at present. It is worth mentioning that this kind of material is not only suitable for perovskite batteries,
but also can be used for organic polymer solar cells, with good versatility, and has been applied for Chinese invention patents.We will promote high-quality development of basic research
As an important part of the country's strategic scientific and technological forces, national research institutions should implement the strategic deployment of the Party Central Committee, base themselves on their own positioning,
accelerate the transformation of scientific research concepts, focus on innovative topic selection mechanisms, organizational models and management methods, strengthen division of labor and coordination with other types of innovation entities, and focus on strategic oriented systematic basic research. We will strive to produce more original and leading major innovations.
As China's first space science exploration mission to conduct in-depth cooperation with the European Space Agency at mission level, the Solar Wind-Magnetosphere Interaction Panoramic Imaging satellite has completed all the development work in the preliminary phase and has fully entered the phase of formal development. The picture shows the space operation diagram of the "Smile" satellite. China News Service, National Space Science Center, Chinese Academy of Sciences
Accelerate the transformation of scientific research concepts, and strengthen the awareness of "seizing the commanding heights"
It is necessary to always bear in mind that national scientific research institutions, as "national teams" and "national people", must be concerned with "national affairs", shoulder "national responsibilities",
and always bear in mind "the biggest of the country", determine the goal and direction of basic research based on the national strategic needs and the world's scientific and technological frontier,
and provide basic theoretical support and technological source supply for innovation and development. Enhance innovation confidence, out of the comfort zone of scientific research, brave the "no man's land" of science and technology,
dare to propose new theories and new methods, open up new fields and new directions, fundamentally reverse the inertia of tracking and following the path of dependence, and actively seize the commanding heights of science and technology.
Innovate the mechanism of basic research topics, and realize the transformation from "what you are doing" and "what you want to do" to "what you should do"
From the strategic height of effectively supporting development, ensuring survival, and enhancing leadership, we should strive to solve the most urgent scientific principles behind the national strategic needs and major scientific and technological problems at the forefront of world science.
Avoid the tendency of "leaving the real to the virtual" in the topic selection, strengthen the docking with important industry departments and backbone enterprises, give full play to the consultation and comment role of strategic scientists,
research and develop and dynamically update the list of major needs and cutting-edge scientific issues. For example, focusing on the major strategic needs of the protection and utilization of black land,
the Chinese Academy of Sciences, in cooperation with relevant departments and local governments, organized more than 1,300 scientific and technological personnel to carry out the "black soil granaries" science and technology battle,
focusing on basic research issues such as the improvement of black land fertility, and promote the organic cross-integration of soil, breeding, plants, information, and space remote sensing.
