Environmentally-conditioned high-efficiency stable inverted perovskite photovoltaic cell and method of making same

By adding phthalamide dihydrochloride as an additive to the perovskite precursor solution, the crystallization process was controlled, solving the crystallization problem of perovskite photovoltaic cells in the air environment. This enabled efficient and stable thin film preparation and improved photoelectric performance, thus promoting the industrialization of perovskite photovoltaics.

CN122373660APending Publication Date: 2026-07-10SHAANXI NORMAL UNIV
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-10
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

In existing technologies, when perovskite photovoltaic cells are prepared in an air environment, water vapor and oxygen affect the crystallization kinetics, leading to a narrowing of the crystallization window, the generation of crystalline phase impurities, and thin film morphology defects. This limits the device performance and long-term stability, hindering its industrialization process.

Method used

Benzylamine dihydrochloride (C8H12Cl2N4) was introduced as an additive into the perovskite precursor solution. Through a multi-hydrogen bond network, it coordinated with the lead-iodine octahedra in the perovskite precursor solution, managed the water molecule binding sites, regulated the crystallization process, broadened the crystallization window, optimized the crystallization orientation of the perovskite, reduced the defect state density, and achieved the preparation of high-quality thin films.

Benefits of technology

Under ambient air conditions, efficient and stable perovskite photovoltaic cell fabrication was achieved, with a photoelectric conversion efficiency of 26.56%, which remained above 25.8% even at 80% humidity. This significantly improved the thin film crystallization quality and photovoltaic parameters, and optimized the device performance and stability.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122373660A_ABST
    Figure CN122373660A_ABST
Patent Text Reader

Abstract

This invention discloses a high-efficiency and stable inverted perovskite photovoltaic cell prepared under environmental conditions and its preparation method, belonging to the field of perovskite solar cell technology. The method uses phthalimide dihydrochloride (C8H2O). 12 Cl2N4 was introduced as an additive into the perovskite precursor solution. By employing a "molecular throttling" strategy to regulate the film formation process from the perovskite precursor solution to the perovskite film, the solution-film transition process was controllably altered, the crystallization window was broadened, and high-quality perovskite films with optimized crystal orientation were prepared. Adaptive crystallization at humidity levels of 15-80% was achieved, which in turn led to the fabrication of high-efficiency solar cells. This provides a simple and effective new strategy for promoting high-quality film formation of perovskite solar cells under ambient air conditions.
Need to check novelty before this filing date? Find Prior Art