Introduction
Perovskite-type solar cells are solar cells that use perovskite-type organometal-halide semiconductors as light-absorbing materials, belonging to the third generation of solar cells, also known as new concept solar cells.
Basic structure and working principle
Basic structure: Perovskite solar cells are mainly composed of perovskite absorption layer, electron transport material, electrode and conductive proton decoupling structure. Among them, the perovskite absorption layer is the core part, responsible for absorbing sunlight and generating electron-hole pairs.
working principle: When sunlight hits the perovskite absorption layer, electron-hole pairs are excited. These electrons and holes move to the electron transport layer and the hole transport layer respectively under the action of an electric field, and are eventually collected by the electrode to form a current, thus generating electrical energy.
Advantages and characteristics
High efficiency: The theoretical extreme value of photoelectric conversion efficiency of perovskite solar cells is higher, up to 33%. By stacking technology, in which perovskite layers are stacked on top of each other or on top of conventional crystalline silicon solar cells to form "tandem" cells capable of absorbing a wider solar spectrum, its conversion efficiency can be further improved. At present, there are laboratories that have achieved photoelectric conversion efficiency of more than 30%.
Low cost: The material cost and production cost of perovskite solar cells are low. Its core raw materials are abundant and easy to obtain, there is no restriction of rare materials, and the preparation process is simple, and low-cost process technology can be used without expensive vacuum equipment.
Easy preparation: The manufacturing process of perovskite solar cells is relatively simple, can be prepared in solution, and the process temperature is low, about 100 ° C. This gives it an advantage in mass production.
Light and flexible: perovskite solar cells can use transparent flexible substrates to prepare translucent flexible battery modules, which are suitable for unconventional new applications such as glass curtain walls, wearable products, and portable products.
Development trend
With the continuous progress of technology and cost reduction, the industrialization process of perovskite solar cells is accelerating. New perovskite battery companies have emerged, and the production capacity and market scale of perovskite batteries continue to expand.
Conclusion
In summary, perovskite solar cells show great development potential in the field of solar energy with their advantages of high efficiency, low cost, easy preparation and portability. With the continuous progress of technology and the further reduction of costs, it is believed that perovskite solar cells will play a more important role in the future energy field.