Method for enhancing the efficiency of a polymer solar cell by lanthanum-induced aggregate formation

Modifying the hole transport layer or active layer of polymer solar cells with lanthanum-induced block polymer nanoclusters as dopants solves the problems of weak spectral absorption and device aging, improves photoelectric conversion efficiency and stability, reduces costs, and is suitable for large-area and commercial applications.

CN116761442BActive Publication Date: 2026-06-12QINGDAO UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
QINGDAO UNIV
Filing Date
2023-05-19
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

Existing polymer solar cells have weak spectral absorption capabilities, and the use of interface modification layers can easily lead to device aging, affecting performance and stability. On the other hand, photovoltaic material dopants on the market are expensive and have poor stability.

Method used

Lanthanum-induced block polymer nanoclusters were prepared by self-assembly and used as dopants to modify hole transport layers or active layers, broadening the spectral absorption range, enhancing light absorption, and providing protection in the ultraviolet region. This optimized device morphology improved performance and stability.

Benefits of technology

It improves photocurrent density and fill factor, increases photoelectric conversion efficiency by 10-15%, extends device lifespan, reduces fabrication costs, and is suitable for large-area and commercial applications.

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Abstract

The application discloses a method for enhancing the efficiency of a polymer solar cell by lanthanum-induced aggregates, comprising the following steps: synthesis of a block polymer with a certain length; preparation of uniform Ln 3+ nanoparticle aggregates in a miscible solvent; device preparation of a nanoparticle aggregate-doped hole transport layer; and preparation of a photovoltaic device of a nanoparticle aggregate-doped active layer. The application provides a method for enhancing the light absorption and conversion efficiency of a polymer solar cell by lanthanum-induced aggregates. Stable lanthanum-induced nanoparticle aggregate powder prepared by a self-assembly method improves the fluorescence excitation and emission intensity, fluorescence lifetime and efficiency of raw materials. The spectrum range of a photovoltaic device prepared by doping the nanoparticle aggregate into a hole transport layer or an active layer is widened, the light absorption capacity is enhanced, and the device has an ultraviolet protection function, so that the photoelectric current density and the fill factor of the device are simultaneously improved, and the performance and stability of the device are improved.
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