Perovskite compositions comprising mixed solvent systems

A technology of mixed solvent system and composition, which is applied in the fields of electric solid-state devices, semiconductor devices, semiconductor/solid-state device manufacturing, etc. It can solve high defect density, low crystallinity, reduce the efficiency and stability of perovskite solar cells, etc. question
CN112166160APending Publication Date: 2021-01-01THE UNIV OF NORTH CAROLINA AT CHAPEL HILL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
THE UNIV OF NORTH CAROLINA AT CHAPEL HILL
Publication Date
2021-01-01

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Abstract

Described herein is an ink solution, comprising a composition of formula (I): ABX3 (I), wherein A comprises at least one cation selected from the group consisting of methylammonium, tetramethylammonium, formamidinium, cesium, rubidium, potassium, sodium, butylammonium, phenethylammonium, phenylammonium, and guanidinium; B comprises at least one divalent metal; and X is at least one halide; and a mixed solvent system comprising two or more solvents selected from the group consisting of dimethyl sulfoxide, dimethylformamide, gamma-butyrolactone, 2-methoxyethanol, and acetonitrile. Methods for producing polycrystalline perovskite films using the ink solutions described herein and the use of the films in photovoltaic and photoactive applications are additionally described.
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Description

[0001] Government interest

[0002] The present invention was completed under the authorization of the approval number N00014-17-1-2619 granted by the Naval Research Bureau with government support. The government has certain rights in this invention.

[0003] Cross references to related applications

[0004] This application claims the benefit of priority in U.S. Provisional Application No. 62 / 651,298 filed on April 2, 2018, which is incorporated herein by reference in its entirety for all purposes.Technical field

[0005] The currently disclosed subject matter generally relates to perovskite compositions including mixed solvent systems. The perovskite composition can be used to manufacture polycrystalline films used in photovoltaic or photosensitive devices.Background technique

[0006] In recent years, perovskite solar cell units have shown rapidly improved power conversion efficiency (PCE) and stability.1-3Certified PCE for small devices has competed with PCE for other thin-film photovoltaic techno...

Claims

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