| abstract |
The invention discloses a method for preparing a perovskite solar cell, which comprises the following steps: (1) cleaning a transparent conductive substrate; (2) preparing a dense hole blocking layer by spin coating on the transparent conductive substrate; (3) preparing a dense hole blocking layer on the dense Spin coating on the hole blocking layer to prepare the mesoporous electron transport layer; (4) prepare the perovskite thin film light absorbing layer on the mesoporous electron transport layer by continuous drop coating; (5) prepare the light absorbing layer on the perovskite thin film The hole transport layer is prepared by spin coating on the layer; (6) the metal back electrode is vapor-deposited on the hole transport layer, and it is completed. The preparation method of the present invention utilizes the continuous drop coating method to prepare the perovskite absorbing layer, and the prepared absorbing layer film has good crystallinity and is easy to control, and the obtained perovskite solar cell has larger grain fluctuations and more regular grains. The short-circuit current, open-circuit voltage and fill factor of the device are higher than those of the liquid-phase two-step method in the prior art, and finally a perovskite solar cell with high energy conversion efficiency and good device repeatability is realized. |