Trans-perovskite solar cell based on mixed electron transport layer and preparation method thereof

By introducing the non-fullerene material Y6 into the fullerene electron transport layer to form a hybrid electron transport layer, the stability and photocurrent problems of the inverted perovskite solar cell were solved, and the performance and stability of the cell were improved.

CN120857769APending Publication Date: 2025-10-28NORTH CHINA ELECTRIC POWER UNIV
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Patent Information

Application Number
CN202510832319.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-20
Publication Date
2025-10-28

AI Technical Summary

Technical Problem

The poor crystallinity of fullerene, the electron transport layer material in inverted perovskite solar cells, leads to poor water and light stability, affecting the overall performance of the cells.

Method used

By introducing the non-fullerene material Y6 into the traditional fullerene electron transport layer, a hybrid electron transport layer is formed. Combining the high electron mobility of PCBM with the wide optical absorption range and multifunctional groups of Y6, the photocurrent and stability of the battery are improved.

Benefits of technology

It improves the photocurrent density and long-term stability of the battery, especially the output efficiency at the maximum power point remains unchanged after continuous irradiation under standard sunlight, demonstrating excellent light stability.

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Abstract

The invention belongs to the technical field of solar cells, and relates to a trans-perovskite solar cell based on a solution method mixed electron transport layer and a preparation method of the trans-perovskite solar cell. The perovskite solar cell is composed of a transparent conductive oxide glass substrate, a hole transport layer, a perovskite light absorption layer, a passivation layer, an electron transport layer and a silver electrode layer in sequence. Materials used by an electron transport layer are generally fullerene and derivatives thereof, but the fullerene has the defects of poor light absorption capability, difficulty in purification, high production cost and the like, and the space for further improving the performance of the device is very small on the premise of good optimization of perovskite layer crystallization and interface engineering. The non-fullerene micromolecule Y6 is introduced into the electron transport layer, so that the cathode interface energy level can be effectively regulated and controlled, and the light absorption of the cell in a near-infrared region is improved. The trans-perovskite solar cell based on the PCBM: Y6 mixed electron transport layer has higher short-circuit current density and stability.
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