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A kind of tin-containing perovskite precursor solution, photoactive layer, battery and preparation method

A tin perovskite and photoactive layer technology, applied in the field of optoelectronic materials, can solve problems such as hindering applications, increasing defect density of states, and reducing performance of photovoltaic devices, so as to improve stability, reduce defect density, and reduce self-doping degree Effect

Active Publication Date: 2022-04-01
HUANENG CLEAN ENERGY RES INST
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Problems solved by technology

But sn 2+ easily oxidized to Sn 4+ The characteristics of tin-containing perovskite form self-doping, increase the density of defect states, and reduce the performance of photovoltaic devices. This property of tin-containing perovskite hinders its wider application

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  • A kind of tin-containing perovskite precursor solution, photoactive layer, battery and preparation method
  • A kind of tin-containing perovskite precursor solution, photoactive layer, battery and preparation method

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Embodiment Construction

[0027] In describing embodiments of the invention, specific terminology is employed for the sake of clarity. However, it is not intended that the invention be limited to the specific terms so chosen. It is to be understood that each specific element includes all technical equivalents which operate in a similar method to achieve a similar purpose.

[0028] The present invention provides an additive strategy to suppress low-priced Sn in tin-containing perovskite precursors 2+ Easily oxidized to high-valent Sn 4+ , to improve the stability of the precursor solution, the present invention adds a certain proportion of tin acetylacetonate to the tin-containing perovskite precursor solution, and through chelation and coordination, the Sn 2+ oxidized to high valence Sn 4+ , thereby improving the photovoltaic performance of tin-containing perovskite solar cells.

[0029] Specifically, a kind of tin-containing perovskite precursor solution, its preparation raw material comprises sol...

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Abstract

The invention discloses a tin-containing perovskite precursor, a photoactive layer, a battery and a preparation method. The invention adds a certain proportion of tin acetylacetonate to the tin-containing perovskite precursor, and through chelation and coordination, Avoid Sn 2+ oxidized to high valence Sn 4+ , thereby improving the photovoltaic performance of tin-containing perovskite solar cells.

Description

technical field [0001] The invention belongs to the field of photoelectric materials, and in particular relates to a tin-containing perovskite precursor solution, a photoactive layer, a battery and a preparation method. Background technique [0002] Organic-inorganic hybrid lead-halide perovskite materials have been brilliant in the field of photovoltaics due to their excellent properties, such as large light absorption coefficient, long carrier diffusion length, adjustable band gap, and easy preparation. However, the toxicity of lead has become an obstacle to its further commercialization. Tin-containing perovskite can reduce the content of lead, and in theory, compared with pure lead perovskite, tin-containing perovskite can obtain a more suitable band gap, and can also be used as the light-absorbing layer of the sub-cell of the laminated battery. But sn 2+ easily oxidized to Sn 4+ The characteristics of tin-containing perovskite form self-doping, increase the density o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/48
CPCH10K71/15H10K71/12Y02E10/549
Inventor 王百月赵志国秦校军赵东明肖平董超熊继光刘家梁刘娜
Owner HUANENG CLEAN ENERGY RES INST