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  • Alexander Hains

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Details

Project TitleTFB:TPDSi2 Interfacial Layer As A PEDOT:PSS Replacement in Organic Photovoltaic Cells
Track Code2007-121
Short Description

Northwestern researchers have developed a new interfacial hole transport/electron-blocking layer for organic photovoltaics.

#energy #solar #materials #photovoltaic

Abstract

This technology obviates the need for the commonly employed PEDOT:PSS layer and significantly improves the performance of MDMO-PPV:PCBM bulk heterojunction (BHJ) solar cells. While organic photovoltaics (OPV) offer advantages over traditional inorganic photovoltaic cells, including fabrication on lightweight flexible substrates and use of lower cost spin-coating and printing processes, it lacks sufficient power conversion efficiency for commercial use. This invention enhances BHJ solar cell efficiency by addressing several areas critical to device performance. A unique TFB:TPDSi2 blend, spin-coated from an organic solvent and air cured to form a covalently bonded film on ITO provides this function. The cured material is transparent above ~ 400 nm, resists solvent attack in subsequent processing and retains adhesion above 60°C. Importantly, the interlayer components possess aligned energy levels, which permits holes to travel efficiently to the anode while preventing electron leakage. This feature results in a vast improvement in power conversion efficiency. This unique combination of interlayer properties provides a basis for significantly improved BHJ solar cell devices. 

 
TagsENERGY: solar, MATERIALS: photovoltaic
 
Posted DateSep 3, 2014 1:58 PM

Researcher

Name
Alexander Hains

Inventor(s)

Tobin Marks* 

Alexander Hains 

Applications

• Organic photovoltaics 

• Solar cells 

Advantages

• Increased power conversion efficiency 
• Enhanced device stability 
• Retains robust ITO adhesion 

• Eliminates use of PEDOT:PSS

Publications

IP Status

Issued US Patent No. 7,888,593

Contact Information

Zach Brown, PhD

Invention Associate
(p) 847-491-4629

(e) Zachary.Brown@northwestern.edu