Composite polymeric:fullerene photovoltaic film enhances conversion efficiency

Feb. 1, 1996
Organic photovoltaic cells composed of buckminsterfullerene (C60) blended with poly(2-methoxy-5-(2`-ethyl-hexyloxy)-1,4-phenylene vinylene), or MEH-PPV, show enhanced performance more than two orders of magnitude greater than MEH-PPV alone. Polymer-based photovoltaic cells could be economical to fabricate and easily tailored to specific applications. In the composite MEH-PPV:fullerene devices developed at the University of California, Santa Barbara, subpicosecond electron transfer from MEH-PPV (

Composite polymeric:fullerene photovoltaic film enhances conversion efficiency

Organic photovoltaic cells composed of buckminsterfullerene (C60) blended with poly(2-methoxy-5-(2`-ethyl-hexyloxy)-1,4-phenylene vinylene), or MEH-PPV, show enhanced performance more than two orders of magnitude greater than MEH-PPV alone. Polymer-based photovoltaic cells could be economical to fabricate and easily tailored to specific applications. In the composite MEH-PPV:fullerene devices developed at the University of California, Santa Barbara, subpicosecond electron transfer from MEH-PPV (donor) to C60 (acceptor) increases the polymer photoconductivity. The structure forms a bicontinuous network of donors and acceptors, making it essentially a bulk heterojunction capable of high collection efficiency.

The group has fabricated several devices consisting of MEH-PPV:C60 composite layered on an indium tin oxide-coated glass or mylar substrate. A thin layer of aluminum or calcium provides the contact, and device sizes range from 1 cm2 to more than 15 cm2. Illumination intensities of 20 mW/cm2 at 430 nm resulted in energy conversion efficiencies of about 2.9%, more than two orders of magnitude higher than undoped MEH-PPV structures. Researchers expect these preliminary efficiency figures to double when device operation is optimized.

Sponsored Recommendations

Request a quote: Micro 3D Printed Part or microArch micro-precision 3D printers

April 11, 2024
See the results for yourself! We'll print a benchmark part so that you can assess our quality. Just send us your file and we'll get to work.

Request a free Micro 3D Printed sample part

April 11, 2024
The best way to understand the part quality we can achieve is by seeing it first-hand. Request a free 3D printed high-precision sample part.

How to Tune Servo Systems: The Basics

April 10, 2024
Learn how to tune a servo system using frequency-based tools to meet system specifications by watching our webinar!

Precision Motion Control for Sample Manipulation in Ultra-High Resolution Tomography

April 10, 2024
Learn the critical items that designers and engineers must consider when attempting to achieve reliable ultra-high resolution tomography results here!

Voice your opinion!

To join the conversation, and become an exclusive member of Laser Focus World, create an account today!