星期五, 七月 10, 2020
Home PV News German scientists study causes of LeTID

German scientists study causes of LeTID

Researchers at Germany’s Fraunhofer Institute for Integrated Systems and Device Technology IISB are trying to understand the causes of light and elevated temperature induced degradation (LeTID) in PERC solar cells. Initial investigations should provide a comprehensive understanding of the process and material dependency of LeTID and related degradation effects in monocrystalline and multicrystalline PERC solar cells.

Source:pv magazine

The development of passivated emitter and rear contact (PERC) solar cell technology has enabled manufacturers to improve the efficiency of crystalline silicon cells to over 22% for monocrystalline products and about 20% for multicrystalline devices. Researchers at Germany’s Fraunhofer Institute for Integrated Systems and Device Technology IISB are now coordinating Zero Degradation, a joint project studying mono- and multicrystalline PERC solar cells, to bring efficiency losses in PERC solar cells to zero.

The efficiency of PERC solar cells can drop by several percentage points during operation. The scientists want to focus on one of the main causes of efficiency loss – light and elevated temperature induced degradation (LeTID). According to the Fraunhofer IISB researchers, the mechanisms and cause of LeTID are still not sufficiently understood.

Under the framework of the project, basic investigations should initially provide a comprehensive understanding of the process and material dependency of LeTID and related degradation effects in monocrystalline and multicrystalline PERC solar cells. The researchers want to find the cause in manufactured monocrystalline and multicrystalline wafer materials, and in the individual steps of solar cell production. The partial results will then be combined in order to achieve a zero degradation concept for the industrial production technology of multi- and monocrystalline PERC solar modules.

The researchers are also focusing on the interaction of impurity elements in the wafer base material with the hydrogen. These impurities are introduced during the production of the solar cell in the surface passivation step.

In addition to Fraunhofer IISB, the Zorro project consortium includes the International Solar Energy Research Center Konstanz e.V. (ISC), the University of Konstanz (UKN), and the Institute for Applied Physics (IAP) of the Technical University Bergakademie Freiberg (Saxony). The associated industry partners are Wacker Chemie and Centrotherm International.

LEAVE A REPLY

Please enter your comment!
Please enter your name here

- Advertisment -

Most Popular

Ikea invests more in solar by the day

In 2019, IKEA invested $2.8 billion in green energy, which contributed to the 1 million solar panels it was able to install on 370...

Bidding war continues as Infigen backs Iberdrola’s revised offer

The bidding war for Australia’s largest ASX-listed renewable energy generator has continued as rivals increased their respective offers. On Monday, Philippines-linked investment company UAC...

NTPC seeks to empanel vendors for bulk solar module procurement

NTPC seeks to empanel domestic and international manufacturers for bulk procurement of solar PV modules as it aims to revamp its renewable energy generation...

India sets new record low solar tariff of Rs 2.36/kWh

The recent 2 GW solar auction by Solar Energy Corporation of India (SECI) hit a historic low tariff of Rs 2.36 per kilowatt-hour (kWh)...