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Title: Highly efficient 3rd generation multi-junction solar cells using silicon heterojunction and perovskite tandem : prospective life cycle environmental impacts
Authors : Itten, René
Stucki, Matthias
Published in : Energies
Volume(Issue) : 10
Issue : 7
Pages : 1
Pages to: 18
Editors of the parent work: Nunzi, Jean-Michel
Publisher / Ed. Institution : MDPI
Issue Date: 23-Jun-2017
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
Language : English
Subjects : LCA; Life Cycle Assessment; Prospective; Photovoltaics; PV; Multi-junction; Perovskite; Silicon heterojunction; Tandem; Electricity; Greenhouse gas emission; Carbon footprint
Subject (DDC) : 621.3: Electrical engineering and electronics
Abstract: In this study, the environmental impacts of monolithic silicon heterojunction organometallic perovskite tandem cells (SHJ-PSC) and single junction organometallic perovskite solar cells (PSC) are compared with the impacts of crystalline silicon based solar cells using a prospective life cycle assessment with a time horizon of 2025. This approach provides a result range depending on key parameters like efficiency, wafer thickness, kerf loss, lifetime, and degradation, which are appropriate for the comparison of these different solar cell types with different maturity levels. The life cycle environmental impacts of SHJ-PSC and PSC solar cells are similar or lower compared to conventional crystalline silicon solar cells, given comparable lifetimes, with the exception of mineral and fossil resource depletion. A PSC single-junction cell with 20% efficiency has to exceed a lifetime of 24 years with less than 3% degradation per year in order to be competitive with the crystalline silicon single-junction cells. If the installed PV capacity has to be maximised with only limited surface area available, the SHJ-PSC tandem is preferable to the PSC single-junction because their environmental impacts are similar, but the surface area requirement of SHJ-PSC tandems is only 70% or lower compared to PSC single-junction cells. The SHJ-PSC and PSC cells have to be embedded in proper encapsulation to maximise the stability of the PSC layer as well as handled and disposed of correctly to minimise the potential toxicity impacts of the heavy metals used in the PSC layer.
Departement: Life Sciences und Facility Management
Organisational Unit: Institute of Natural Resource Sciences (IUNR)
Publication type: Article in scientific Journal
DOI : 10.3390/en10070841
Appears in Collections:Publikationen Life Sciences und Facility Management

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