Posted in | News | Solar Energy

Heliatek Introduces Transparent Solar Films for Windows and Building Walls

Heliatek, a global developer of organic photovoltaics (OPV) and organic solar films, has developed novel transparent solar films that will allow tinted glass windows to generate electricity.

Transparent solar films will enable building glass to become energy harvesters that smoothly integrate into a building’s design. © Heliatek GmbH

These transparent solar films can be integrated in double glazed windows between the glass sheets. Heliatek uses a unique vapor deposition technology that enables a homogeneous solar coating layer devoid of irregularities or distracting patterns.

The company is collaborating with building material manufacturers for integrating the solar film technology into their products. It has also entered into an agreement with RECKLI, a producer of elastic molds for concrete façades. This collaboration aims to integrate solar films on building walls made of concrete, which will allow the whole wall to function as a solar energy harvester. Such a system will not require cooling mechanisms or supporting structures. Heliatek will be exhibiting a study of this application at the Intersolar EUROPE event in Germany.

Heliatek has developed and synthesized oligomers at its Ulm lab in Germany. It uses a roll-to-roll vacuum process at low temperatures. The cells possess high uniformity and purity and are made from nm-thin layers. This technology functionality may be considered to be the reverse of OLED technology.

The color and transparency levels of the Heliatek solar films can be customized according to the requirements. At 23.5% light transmission levels, these cells deliver an efficiency of 7%. The present transparency level is 40%, which can be increased to 50%. Earlier tests by SGS proved that Heliatek's cells performed better than traditional solar technologies. The cell efficiency did not drop with increase in temperatures.

Disclaimer: The views expressed here are those of the author expressed in their private capacity and do not necessarily represent the views of Limited T/A AZoNetwork the owner and operator of this website. This disclaimer forms part of the Terms and conditions of use of this website.

G.P. Thomas

Written by

G.P. Thomas

Gary graduated from the University of Manchester with a first-class honours degree in Geochemistry and a Masters in Earth Sciences. After working in the Australian mining industry, Gary decided to hang up his geology boots and turn his hand to writing. When he isn't developing topical and informative content, Gary can usually be found playing his beloved guitar, or watching Aston Villa FC snatch defeat from the jaws of victory.


Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    Thomas, G.P.. (2019, March 01). Heliatek Introduces Transparent Solar Films for Windows and Building Walls. AZoCleantech. Retrieved on June 21, 2024 from

  • MLA

    Thomas, G.P.. "Heliatek Introduces Transparent Solar Films for Windows and Building Walls". AZoCleantech. 21 June 2024. <>.

  • Chicago

    Thomas, G.P.. "Heliatek Introduces Transparent Solar Films for Windows and Building Walls". AZoCleantech. (accessed June 21, 2024).

  • Harvard

    Thomas, G.P.. 2019. Heliatek Introduces Transparent Solar Films for Windows and Building Walls. AZoCleantech, viewed 21 June 2024,

Tell Us What You Think

Do you have a review, update or anything you would like to add to this news story?

Leave your feedback
Your comment type

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.