In recent years, because of its advantages of light weight, low cost, and the ability to fabricate large-area flexible devices by printing, polymer solar cells have attracted wide attention from the academic and industrial communities and are important frontier research fields. The active layer of a polymer solar cell is typically formed by blending an electron donor and an electron acceptor based on a polymer/organic small molecule. As an electron acceptor material, a fullerene n-type organic semiconductor represented by PCBM has been widely used in polymer solar cells, and the efficiency of a polymer-fullerene-based polymer solar cell has exceeded 11%. Due to the limitations of fullerene receptors in the visible region with weak light absorption, small molecular energy range modulation, and high synthesis and purification costs, people gradually turned their attention to non-fullerene-based polymer solar cells. Many research groups at home and abroad have long focused on the research of non-fullerene receptors, but the efficiency of solar cells based on polymer donor-nonfullerene receptors is still significantly lower than that of polymer donor-fullerene. Receptor solar cells. In recent years, a variety of non-fullerene receptors with excellent properties have been designed, such as naphthalene diimide polymer acceptor N2200, ADA type small molecule ITIC, perylenediimide type small molecule and polymer Receptors etc. The above-mentioned novel receptors provide possibilities for preparing high-efficiency non-fullerene polymer solar cells. Non-fullerene polymer solar cells not only require high-performance acceptor materials, but also require careful regulation of the chemical structure and optoelectronic properties of the polymer donor. In 2013, the Polymer Physics and Chemistry Laboratory of the Institute of Chemistry, Chinese Academy of Sciences reported a polymer based on two-dimensional conjugated BDT units and BDD units (abbreviation: PBDB-T) (Macromolecules 2012, 45, 9611-9617). Since then, researchers in the lab have used polymer PBDB-T to blend with a variety of non-fullerene acceptor materials to make photovoltaic devices. The results show that the polymer is very suitable for the preparation of high-efficiency nonfullerene type Polymer solar cells. Based on this, researchers have made a series of research progress Org. Electron. 2015, 17, 295-303; ACS Appl. Mater. Interf. 2015, 7, 9274-9280; Adv. Mater. 2015, 27, 6046-6054. Recently, under the support of the Chinese Academy of Sciences and the National Natural Science Foundation of China, the researchers of the Hou Jianhui Group of the Polymer Physics and Chemistry Laboratory of the Institute of Chemistry further blended PBDB-T with commercially available non-fullerene-type receptor material ITIC. Polymeric solar cells of the quinone type achieved a record energy conversion efficiency of 11.2% in a small-area device (13 mm2). This is not only one of the most prominent results of current non-fullerenes acceptor solar cells, but also makes the efficiency of fullerene polymer solar cells reach the best level of fullerene receptors. The research team also prepared a 1cm2 battery. The efficiency of the battery was verified by a qualified third party using a "window method", which reached 10.78%, which is the highest result obtained in a 1cm2 polymer solar cell. In addition, this battery active layer film also exhibits excellent thermal stability, and can maintain nearly 11% of the photovoltaic efficiency after thermal annealing at 100 oC for 250 hours (Adv. Mater. 2016, 28, 4734–4739). After the publication of this work, it attracted the attention of many science and technology media, among which Nature magazine evaluated the work in its Research Highlights (Nature 2016, 285, 532), and considered that “10.78% efficiency in a 1cm2 battery is organic. "The documentary results of photovoltaic cells", and pointed out that the battery "is easy to achieve low-cost preparation." Single Side Bearing Ring Machine Single Side Bearing Ring Machine,Hub Bearing Turning Machine,Thrust Bearing Turning Machine,Single Slide Turning Machine Shaoxing Sunfong Intelligent Equipment Inc. , https://www.zjsxsunfong.com