Imec, Kaneka achieve breakthrough in developing next-generation heterojunction solar cells

Jun 12, 2012

(Phys.org) -- Kaneka and imec report a large area (6 inch semi-square) heterojunction silicon solar cell with a certified power conversion efficiency of 22.68% with an electroplated copper contact grid on top of the transparent conductive oxide layer. This breakthrough is achieved at Kaneka Osaka lab using Kaneka’s copper electroplating technology which is based on imec’s state-of-the-art copper electroplating knowhow.

To realize the top grid electrode in heterojunction silicon , silver screen printing is the preferred technology in the PV (photovoltaic) industry. However, a drawback of this technology is the difficulty to lower resistivity and to thin the metal line in silver screen printed contacts. As a result, efficiencies remain below optimal and cost remains relatively high. Replacing the screen-printed silver with electroplated copper overcomes the disadvantages of silver screen printing, enabling higher efficiencies and reduced fabrication costs.

Kaneka’s Photovoltaics European Laboratory is located at the imec campus in Leuven (Belgium), with access to imec’s state-of-the-art PV infrastructure. The collaboration between Kaneka and imec has led to the improvement of Kaneka’s thin-film solar cells and the development of next-generation heterojunction cells. This development of large area Cu-plated heterojunction solar cells is an important step towards a fab-compatible process on large area module integrated solar cells.

Jef Poortmans, Director PV technologies at imec: “We are excited that we could support Kaneka in developing this breakthrough results. They prove the capabilities of copper metallization for next-generation solar cells and strengthen our believe that in the future will play an important role in high efficiency and sustainable solar cell technology.”

Explore further: Indonesia passes law to tap volcano power

add to favorites email to friend print save as pdf

Related Stories

Recommended for you

South Korea's Samsung and LG unveil new smartwatches

17 minutes ago

South Korea's Samsung and LG unveiled new smartwatches Thursday with upgraded functions and design as they step up their drive to lead an increasingly competitive market for wearable devices.

Apple to unveil 'iWatch' on September 9

2 hours ago

Apple will unveil an "iWatch" in September with the maker of the iPhone finally embarking on its much-rumored foray into wearable computing, technology news website Re/code said Wednesday.

User comments : 0