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Updated: Jul 7, 2026

Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer
Published on: January 10, 2017
Decoupling Processing-Morphology-Stability Relationships Enables 19.65% Organic Solar Cells With Exceptional
Zhipeng Yin1, Zhisheng Zhou1, Jialin Wu1
1Institute of Polymer Optoelectronic Materials and Devices, Guangdong Basic Research Center of Excellence for Energy and Information Polymer Materials, National Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, China.
Researchers developed a new framework to understand how processing affects organic solar cell (OSC) performance and stability. This led to optimized OSCs with 19.65% efficiency and improved longevity.
Area of Science:
- Materials Science
- Organic Electronics
- Photovoltaics
Background:
- Commercial viability of organic solar cells (OSCs) requires high efficiency and stability.
- Limited understanding of how processing affects OSC film formation and longevity.
Purpose of the Study:
- To develop a mechanism-guided framework to deconvolve processing effects on OSCs.
- To establish quantitative correlations between processing, morphology, and stability.
Main Methods:
- Utilized a multivariate framework to analyze solvent additives, solid additives, multi-component blending, and thermal annealing.
- Employed in situ time-resolved absorption spectroscopy to study film formation kinetics.
- Identified three distinct stages of film formation and resolved crystallization dynamics.
Main Results:
- A synergistic combination of processing strategies yielded highly ordered, thermodynamically robust bulk heterojunction (BHJ) morphology.
- Achieved a champion power conversion efficiency of 19.65% in optimized OSCs.
- Demonstrated outstanding operational stability under continuous 1-sun illumination.
Conclusions:
- Established a quantitative processing-morphology-stability correlation for OSCs.
- Provided a universal platform for designing high-performance, long-lifetime OSCs.
- Advanced the understanding of film formation and its impact on device longevity.
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