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Related Experiment Video

Updated: Jul 6, 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

High-Performance All-Small-Molecule Organic Solar Cells Fabricated via Halogen-Free Preparation Process.

Bo Du¹, Mengyuan Ma¹, Panpan Zhang¹

¹Laboratory of Advanced Optoelectronic Materials, Suzhou Key Laboratory of Novel Semiconductor Materials and Devices, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, Jiangsu, P. R. China.

ACS Applied Materials & Interfaces

|January 2, 2024

Summary

This study demonstrates that nonhalogen solvents can be used to fabricate high-performance all-small-molecule organic solar cells (ASM-OSCs). Toluene enabled stable morphology and achieved power conversion efficiencies of 14.4% in small-area devices.

Keywords:

all-small-molecule halogen-free large area organic solar cells power conversion efficiency

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

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Last Updated: Jul 6, 2025

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

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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:

Small-molecule organic solar cells (ASM-OSCs) offer advantages like precise structure and ease of synthesis.
Traditional ASM-OSC fabrication often relies on halogenated solvents, posing environmental and health risks.
Developing nonhalogen solvent processing is crucial for sustainable commercialization of ASM-OSCs.

Purpose of the Study:

To investigate the impact of various nonhalogen solvents on ASM-OSC performance.
To demonstrate a viable nonhalogen solvent processing method for high-efficiency ASM-OSCs.
To assess the morphology and stability of active layers processed with nonhalogen solvents.

Main Methods:

Screening of various nonhalogen solvents for active layer processing.
Utilizing toluene, a high boiling point nonhalogen solvent, for blend film formation.
Characterization of blend film morphology and device performance (power conversion efficiency).

Main Results:

Toluene facilitated desirable phase separation and a stable morphology with fibrous crystals.
Achieved power conversion efficiencies of 14.4% for small-area (0.04 cm²) devices.
Obtained 11.7% power conversion efficiency for large-area (1 cm²) devices with steady performance.

Conclusions:

Successful fabrication of ASM-OSCs was achieved without using halogenated solvents.
Nonhalogen solvent processing, specifically with toluene, leads to high-performance and stable devices.
This approach presents a promising pathway for the environmentally friendly commercial production of ASM-OSCs.