Related Experiment Video
Updated: Jul 20, 2025
06:49
In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation
Published on: March 2, 2021
6.3K
Embedded Host/Guest Alloy Aggregations Enable High-Performance Ternary Organic Photovoltaics
Xiaoning Wang1,2, Jianxiao Wang1,3,4, Pengchao Wang1,5
1Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China.
Advanced Materials (Deerfield Beach, Fla.)
|July 31, 2023
Summary
Controlling guest component distribution in ternary organic photovoltaics is key. This study reveals alloy-like aggregations enhance device performance, achieving efficiencies over 19% by optimizing morphology and charge behavior.
Area of Science:
- Materials Science
- Organic Electronics
- Photovoltaics
Background:
- Ternary strategies are crucial for enhancing organic photovoltaic (OPV) power conversion efficiencies.
- The precise location and distribution of guest components significantly impact ternary OPV performance.
- Limited research has focused on understanding and controlling guest component distribution.
Purpose of the Study:
- To investigate the distribution of LA1 as a guest acceptor in various ternary OPV systems.
- To identify the driving forces governing guest distribution and device operating modes.
- To establish structure-property relationships for optimizing ternary OPV performance.
Main Methods:
- Fabrication and characterization of ternary organic photovoltaic devices with varying host and guest acceptor combinations.
- Analysis of guest acceptor (LA1) distribution within the host acceptor phases.
- Evaluation of morphological, energetic, and charge transport properties.
Main Results:
- LA1 molecules predominantly form embedded, alloy-like aggregations within host acceptor phases.
- Optimal compatibility, crystallinity, and interfacial interactions govern this distribution.
- Ternary cells (PM6:IT-4F:LA1) achieved 15.27% efficiency with >81% fill factor.
- Y6-family based ternary devices reached a high efficiency of 19.17%.
Conclusions:
- Guest component distribution is a critical factor in ternary OPV performance.
- Controlling guest distribution through material selection and interfacial engineering optimizes device efficiency.
- The formation of alloy-like structures significantly enhances morphology, energy transfer, and charge behavior in OPVs.
