March 17, 2023
By: Gourav Mishra/ Solar, Technology
Italy-based renewable energy company Enel Green Power,
researchers at the National Solar Energy Institute (INES), and the French
Alternative Energies and Atomic Energy Commission (CEA) claimed to have
achieved a power conversion efficiency of 26.5% for a 2-terminal tandem
perovskite solar cell.
The improved efficiency in the collaborative research was
obtained for a PIN architecture cell in the device with an active area of 9 cm²
and an open-circuit voltage of over 1,880 Mv, with shading correction.
The PIN architecture also helped the collaboration adapt the
heterojunction silicon cell produced on the CEA pilot line for its tandem
integration.
The researchers said that integrating a P layer allows the
deposition of halogenated organometallic perovskite (PK) material without any
initial treatment and the optimization of the N-type transport layers.
The collaboration further explored tandem technology to
achieve high yields in conventional photovoltaic formats with processes that
would allow their industrialization.
The 26.5% efficiency achieved in the above experiment
surpassed the earlier conversion efficiencies of 24.9% and 25.8%, achieved on
the same active area of 9 cm².
The teams from Enel and CEA are studying the photovoltaic
properties of PK materials. They claimed these materials could help achieve
conversion efficiencies above 30% by combining them with a lower band-gap
material like silicon.
Enel Green Power and its subsidiary 3SUN at Catania in Italy
are collaborating with CEA at INES to develop the tandem perovskite-silicon
technology with two terminals. A statement by INES said that the work aims to
achieve the highest industrially feasible efficiencies in record time.
In the study, the researchers focus on two routes, a
NIP-type architecture, wherein they claimed to have achieved a record
efficiency of 23.7% on the active surface. The second route, a PIN-type
architecture, has been studied since 2021.
Last November, Enel said it intends to build a 3 GW
industrial-scale solar module production facility in the United States through
its subsidiary 3Sun USA.
In another research, experts at TNO, TU Eindhoven, imec, and
TU Delft, partners in Solliance, a solar research institute in the Netherlands,
claimed to have pushed the conversion efficiency of tandem solar cells to more
than 30%. This efficiency, they said, is beyond the limits of today’s
commercial photovoltaic modules and enables more power per square meter and
less cost per kWh.
Source: https://bit.ly/3n4xBwQ
(www.mercomindia.com )
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