Perovskite Composite Structure with Sterically-Hindered Layer

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Solution Overview

Problem

The development of a perovskite material suitable for use in a wet process that is stable in atmospheric environments and has high electron mobility is hindered by issues such as moisture and oxygen sensitivity and the inability to grow continuous crystals.

Innovation Solution

A perovskite composite structure is developed, comprising a light absorption layer with a perovskite material and a sterically-hindered layer containing a two-dimensional material, which blocks moisture and air, enhancing stability and electron transport capability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If organic-inorganic hybrid perovskite material is used for high efficiency solar cells, then light absorption and electron mobility are improved, but stability in atmospheric environment deteriorates due to moisture and oxygen sensitivity

Engineering Contradiction:

Improvestability in atmospheric environmentVSAvoidmoisture and oxygen sensitivity

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies composite materials by combining organic-inorganic hybrid perovskite material with inorganic materials (such as metal oxides, metal chalcogenides, or their combinations) to form a composite perovskite material. This composite structure provides both the high light absorption and electron mobility of perovskite and the stability of inorganic materials, directly addressing the moisture and oxygen sensitivity issue while maintaining photovoltaic performance

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent creates an inert environment by encapsulating the perovskite material within a composite structure that includes inorganic materials with low moisture and oxygen permeability. This effectively isolates the sensitive organic-inorganic hybrid perovskite from atmospheric moisture and oxygen, providing protection without requiring external inert gas environments

Inventive Principle:

Principle #39Inert atmosphere (Inert environment)

2Ease of manufacture

If organic-inorganic hybrid perovskite material is used for high efficiency solar cells, then light absorption is improved, but manufacturing complexity increases due to moisture and oxygen-proof process environment requirements

Engineering Contradiction:

Improvewet process compatibilityVSAvoidmoisture and oxygen-proof process environment

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

By forming a composite perovskite material that integrates inorganic materials with the organic-inorganic hybrid perovskite, the material gains intrinsic stability against moisture and oxygen. This allows the material to be processed using wet processes without requiring complex moisture and oxygen-proof environments, as the composite structure itself provides the necessary protection

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent changes the chemical composition parameters by incorporating inorganic materials into the perovskite structure, transforming it from a purely organic-inorganic hybrid to a composite material. This parameter change fundamentally alters the material's stability characteristics, enabling wet process manufacturing without complex environmental controls

Inventive Principle:

Principle #35Parameter changes

3Stability of the object's composition

If traditional perovskite material is used, then high electron mobility is achieved, but the ability to grow continuous crystal deteriorates

Engineering Contradiction:

Improvecontinuous crystal growthVSAvoidelectron mobility

Core Design Contradiction:

Stability of the object's compositionVSReliability

Solution Approach 1:

The composite structure combines organic-inorganic hybrid perovskite material with inorganic materials, where the inorganic components provide structural stability that facilitates continuous crystal growth. Meanwhile, the perovskite component maintains high electron mobility, thus resolving the contradiction between crystal continuity and electron transport performance

Inventive Principle:

Principle #40Composite materials

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The perovskite composite structure achieves stability in atmospheric environments and increases electron mobility, making it suitable for high-sensitive light sensors and solar cells.

Implementation Method 1

a sterically-hindered layer which blocks moisture and air

Methodology Applied

Scientific EffectPhysical barrier blocking: Physical Containment

Implementation Method 2

since the light absorption layer and/or the sterically-hindered layer of the perovskite composite structure of the invention includes a two-dimensional material, the electron transport capability of the perovskite can be increased

Methodology Applied

Scientific EffectElectron transport: Conduction (electrical)

Data Source

PatentUS10453620B2Perovskite composite structure

Publication Date: 2019.10.22 WINBOND ELECTRONICS CORP

AI summary

A perovskite composite structure is provided. The perovskite composite structure includes a light absorption layer and a sterically-hindered layer disposed in the periphery of the light absorption layer. The light absorption layer includes a perovskite material. The sterically-hindered layer includes a two-dimensional material.