Beijing Advanced Innovation Center for Materials Genome Engineering, Research Center for Sensor Technology, Beijing Key Laboratory for Sensor, MOE Key Laboratory for Modern Measurement and Control Technology, School of Applied Sciences, Beijing Information Science and Technology University, Jianxiangqiao Campus, Beijing 100101, China.
State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100864, China.
Molecules. 2019 Nov 7;24(22):4039. doi: 10.3390/molecules24224039.
With the rapid consumption of energy, clean solar energy has become a key study and development subject, especially the when new renewable energy perovskite solar cells (PSCs) are involved. The doping method is a common means to modulate the properties of perovskite film. The main work of this paper is to incorporate trace amounts of alkali metal elements into the perovskite layer and observe the effects on the properties of the perovskite device and the majority carrier type of the perovskite film. Comparative analysis was performed by doping with Na, K, and Rb or using undoped devices in the perovskite layer. The results show that the incorporation of alkali metal ions into the perovskite layer has an important effect on the majority carrier type of the perovskite film. The majority carrier type of the undoped perovskite layer is N-type, and the majority carrier type of the perovskite layer doped with the alkali metal element is P-type. The carrier concentration of perovskite films is increased by at least two orders of magnitude after doping. That is to say, we can control the majority of the carrier type of the perovskite layer by controlling the doping subjectively. This will provide strong support for the development of future homojunction perovskite solar cells. This is of great help to improve the performance of PSC devices.
随着能源的快速消耗，清洁的太阳能已成为一个关键的研究和开发课题，特别是涉及到新型可再生能源钙钛矿太阳能电池（PSCs）时。掺杂方法是调节钙钛矿薄膜性能的常用手段。本文的主要工作是将微量的碱金属元素掺入钙钛矿层中，并观察它们对钙钛矿器件性能和钙钛矿薄膜多数载流子类型的影响。通过在钙钛矿层中掺杂 Na、K 和 Rb 或使用未掺杂器件进行比较分析。结果表明，碱金属离子掺入钙钛矿层对钙钛矿薄膜的多数载流子类型有重要影响。未掺杂钙钛矿层的多数载流子类型为 N 型，而掺杂碱金属元素的钙钛矿层的多数载流子类型为 P 型。掺杂后钙钛矿薄膜的载流子浓度至少增加了两个数量级。也就是说，我们可以通过主观控制掺杂主体来控制钙钛矿层的多数载流子类型。这将为未来同质结钙钛矿太阳能电池的发展提供有力支持。这对提高 PSC 器件的性能有很大帮助。
