Preparation method of inorganic trans-perovskite solar cell based on quantum dot modification

Abstract

The invention discloses a preparation method of an inorganic trans-perovskite solar cell based on quantum dot modification. The preparation method comprises the following steps: (1) washing transparent FTO conducting glass; (2) preparing a CuOx inorganic hole transport layer; (3) preparing an inorganic perovskite / quantum dot composite film on the inorganic hole transport layer as a light absorption layer and an electron transport layer of the device together; and (4) enabling the inorganic perovskite / quantum dot composite film to be covered with a counter electrode so as to obtain the inorganic trans-perovskite solar cell based on quantum dot modification. The light absorption layer is prepared from quantum dots with light absorption capacity and an inorganic perovskite light absorption material together, so that the utilization rate of sunlight is improved, the quantum dots are used as the electron transport layer while the charge extraction capacity of the device is improved, and thepreparation technology is simplified; and moreover, the inorganic perovskite crystal structure and film-forming property are improved through partial doping of the quantum dots, so that the stabilityof the device is improved, and the transportation and separation of carriers are further accelerated while the charge recombination is reduced effectively.

Description

technical field

[0001] The invention belongs to the field of organic photoelectric-solar cells, and in particular relates to a method for preparing quantum dot-based modified inorganic trans-type perovskite solar cells. Background technique

[0002] Perovskite solar cells have become a research hotspot in the field of optoelectronic devices due to their high efficiency, low cost, simple process, and environmental friendliness. At present, the conversion efficiency of this type of solar cell has reached 24.2%, showing a very high potential for development and application. Although as a new type of battery, the photoelectric conversion efficiency of perovskite solar cells has far exceeded other types of new concept solar cells, and there is still a lot of room for improvement, but its stability is far from the expectations of practical applications. far. Among them, the perovskite light-absorbing material CH 3 NH 3 wxya 3 (X=I, Br, Cl) is extremely sensitive to light, hea...