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Related Experiment Video

Updated: Aug 17, 2025

Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer

Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer

Published on: January 10, 2017

Over 19% Efficiency Organic Solar Cells by Regulating Multidimensional Intermolecular Interactions.

Chenyu Han¹, Jianxiao Wang^1,2, Shuai Zhang¹

¹Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China.

Advanced Materials (Deerfield Beach, Fla.)

|December 16, 2022

Summary

Researchers explored how intermolecular interactions affect organic solar cell (OSC) performance. Optimizing these interactions through molecular design led to efficiencies over 14%, with one device reaching 19.12%.

Keywords:

compatibility crystallinity multidimensional interactions organic solar cells phenylalkyl

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Printing Fabrication of Bulk Heterojunction Solar Cells and In Situ Morphology Characterization

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Last Updated: Aug 17, 2025

Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer

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In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation

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Published on: March 2, 2021

Printing Fabrication of Bulk Heterojunction Solar Cells and In Situ Morphology Characterization

Printing Fabrication of Bulk Heterojunction Solar Cells and In Situ Morphology Characterization

Published on: January 29, 2017

Area of Science:

Materials Science
Organic Electronics
Photovoltaics

Background:

Organic solar cells (OSCs) advancement relies on material innovation and device engineering.
The role of intermolecular interactions, especially synergistic effects, in OSC performance is underexplored.

Purpose of the Study:

Investigate the relationship between photovoltaic conversion and multidimensional intermolecular interactions in OSC active layers.
Understand how side-chain isomerization and end-cap engineering of acceptors influence these interactions.

Main Methods:

Synthesized phenylalkyl (LA-series) and alkylphenyl (ITIC-series) acceptors.
Studied crystallinity, intermolecular interactions (face-on, donor/acceptor), phase separation, and charge transport.
Evaluated device performance with BTP-eC9 as a host material.

Main Results:

LA-series acceptors showed stronger crystallinity and preferential face-on interactions compared to ITIC-series.
Moderate donor/acceptor interactions in PM6/LA-series pairs enhanced phase separation and charge transport, yielding >14% efficiency.
LA-series acceptors demonstrated good compatibility and crystallinity with BTP-eC9, forming "alloy-like" phases.
The LA23 acceptor achieved a high efficiency of 19.12% due to optimized interactions and microstructure.

Conclusions:

Multidimensional intermolecular interactions are crucial for optimizing OSC photovoltaic performance.
Molecular design, including side-chain and end-cap engineering, can effectively tune these interactions.
Achieving well-organized "alloy-like" phases through controlled interactions is key to high-efficiency OSCs.