Organic Solar Cell Acceptor Compound with Chalcogen Interaction

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Solution Overview

Problem

Inorganic solar cells face limitations in economic feasibility and material demands, while organic semiconductor solar cells require additional processes to prevent charge loss due to electron and hole recombination, increasing manufacturing costs.

Innovation Solution

A compound represented by Formula 1 is introduced, which acts as an electron acceptor material, improving crystallinity through chalcogen-chalcogen interaction, and is used in an organic solar cell to enhance open-circuit voltage, short-circuit current, and efficiency without the need for fullerenes, and exhibits excellent oxidation stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If additional processes are used to prevent charge loss due to recombination, then charge loss is reduced, but manufacturing cost increases

Engineering Contradiction:

Improvecharge loss preventionVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent extracts and eliminates the need for additional electron transport layers by incorporating electron-transporting functionality directly into the acceptor material molecule itself through electron-withdrawing groups, thereby reducing manufacturing complexity and cost while maintaining charge loss prevention

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The acceptor material is designed to perform multiple functions simultaneously: it acts as both the electron acceptor and the electron transport medium through its molecular structure containing electron-withdrawing groups, eliminating the need for separate functional layers

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Productivity

If inorganic solar cells are used, then power conversion efficiency is high, but economic feasibility and material availability are limited

Engineering Contradiction:

Improvepower conversion efficiencyVSAvoideconomic feasibility

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

The patent changes the material parameter from inorganic to organic semiconductor, maintaining high power conversion efficiency through molecular design with electron-withdrawing groups while improving economic feasibility and material availability

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite molecular structure combining electron-donating and electron-withdrawing groups within the acceptor material to achieve both high efficiency and economic viability

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 compound increases the efficiency and service life of organic solar cells by reducing charge loss and improving electrical characteristics, while simplifying the manufacturing process by eliminating the need for additional layers.

Implementation Method 1

An organic solar cell is a device which may directly convert solar energy into electric energy by applying a photovoltaic effect

Methodology Applied

Scientific EffectPhotovoltaic effect: Photovoltaic Effect

Implementation Method 2

improving crystallinity through chalcogen-chalcogen interaction

Methodology Applied

Scientific EffectChalcogen-chalcogen interaction:

Data Source

PatentUS11158818B2Compound and organic solar cell comprising same

Publication Date: 2021.10.26 LG CHEM LTD

AI summary

The present specification provides the compound represented by Formula 1 and an organic solar cell including the same.