DaZheng attended the 4th Heterojunction, Perovskite & Tandem solar cell Forum
From August 25 to 26, 2022, the 4th Heterojunction, Perovskite & Tandem solar cell Forum was held in Changzhou, Jiangsu Province. The 4th Heterojunction, Perovskite & Tandem solar cell Forum aims to discuss the outlook of photovoltaic industry in the background of carbon neutral, focusing on the optimization of heterojunction cell technology, key links and equipment cost reduction, and explore the comprehensive development level of heterojunction, perovskite and tandem solar cells, as well as the market potential in the hot field of photovoltaic.
Yu Wang, the general manager of Dazheng company, was invited to make a speech, sharing the development situation and market prospects of the flexible perovskite solar cell technology, and jointly promoting the marketization of next-generation technology and products.
Dazheng’s general manager Yu Wang made a speech on the forum
Perovskite solar cells are the use of perovskite type organic metal halide semiconductors as light absorbing materials of solar cells. They are representatives of the third generation of efficient thin film solar cells. With good light absorption, charge transfer rate and huge development potential, they have achieved high efficiency, high flexibility and low cost, and are known as "new hopes in the photovoltaic field". Its downstream market is broad, and it is expected to take the lead in the BIPV field, and further apply to photovoltaic power stations, adjacent spaces and other scenarios.
At the same time, the high-precision slot die coating machine independently developed by Dazheng was also exhibited in the forum. Through the accumulation of research on materials and hydrodynamics, Dazheng realized the preparation of four consecutive layers of nano thin films in liquid phase, and stably realized the preparation of perovskite thin film cells. This has also successfully broken the technical barrier that thin film cells rely heavily on high vacuum physical/chemical deposition equipment in Europe and the United States. After the current research and development and sales of high-precision slot die coater, the independent production of core equipment has been realized.
Forum and exhibition photos
Performance characteristics of Dazheng slot die coating machine
1. Preparation of liquid phase coating of four consecutive nm-grade thin films;
2. Suitable for the solution system with different viscosity, range: 0.7 ~ 50000 cps;
3. Fast coating rate and high uniformity of coating;
4. Greatly reduce the production cost of products and improve the product competitiveness.
A perovskite solar cell (PSC) is a type of solar cell which includes a perovskite-structured compound, most commonly a hybrid organic-inorganic lead or tin halide-based material, as the light-harvesting active layer. Perovskite materials, such as methylammonium lead halides and all-inorganic cesium lead halide, are cheap to produce and simple to manufacture. Perovskites have inherent properties such as broad absorption spectrum, fast charge separation, long electron and hole transport distance, and long carrier separation lifetime, making them very promising solid-state solar cell materials.
A perovskite is any material with a crystal structure following the formula ABX3, which was first discovered as the mineral called perovskite, which consists of calcium titanium oxide (CaTiO3). Perovskites have a nearly cubic structure and the chemical formula is ABO3. Typically perovskite compounds have the chemical formula ABX3, where "A" and "B" represent cations and X is an anion bound to both. A large number of different elements can combine to form a perovskite structure. Using this compositional flexibility, scientists can design perovskite crystals with a variety of physical, optical, and electrical properties. Today, perovskite crystals are found in ultrasonic machines, memory chips and current solar cells.
Tandem solar cells are an important strategy to push the Shockley-Queisser (S-Q) efficiency limit of single-junction solar cells, it can be lower the cost per watt.