Fingerprints Indicating Superior Properties of Internal Interfaces in Cu(In,Ga)Se2 Thin-Film Solar Cells

© 2022 The Authors. Advanced Materials published by Wiley-VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 34(2022), 37 vom: 20. Sept., Seite e2203954
1. Verfasser: Raghuwanshi, Mohit (VerfasserIn)
Weitere Verfasser: Chugh, Manjusha, Sozzi, Giovanna, Kanevce, Ana, Kühne, Thomas D, Mirhosseini, Hossein, Wuerz, Roland, Cojocaru-Mirédin, Oana
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2022
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article CIGS solar cells Cu-poor Cu(In,Ga)Se2 Cu-rich Cu(In,Ga)Se2 device simulations grain boundaries p-n junctions
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520 |a Growth of Cu(In,Ga)Se2 (CIGS) absorbers under Cu-poor conditions gives rise to incorporation of numerous defects into the bulk, whereas the same absorber grown under Cu-rich conditions leads to a stoichiometric bulk with minimum defects. This suggests that CIGS absorbers grown under Cu-rich conditions are more suitable for solar cell applications. However, the CIGS solar cell devices with record efficiencies have all been fabricated under Cu-poor conditions, despite the expectations. Therefore, in the present work, both Cu-poor and Cu-rich CIGS cells are investigated, and the superior properties of the internal interfaces of the Cu-poor CIGS cells, such as the p-n junction and grain boundaries, which always makes them the record-efficiency devices, are shown. More precisely, by employing a correlative microscopy approach, the typical fingerprints for superior properties of internal interfaces necessary for maintaining a lower recombination activity in the cell is discovered. These are a Cu-depleted and Cd-enriched CIGS absorber surface, near the p-n junction, as well as a negative Cu factor (∆β) and high Na content (>1.5 at%) at the grain boundaries. Thus, this work provides key factors governing the device performance (efficiency), which can be considered in the design of next-generation solar cells 
650 4 |a Journal Article 
650 4 |a CIGS solar cells 
650 4 |a Cu-poor Cu(In,Ga)Se2 
650 4 |a Cu-rich Cu(In,Ga)Se2 
650 4 |a device simulations 
650 4 |a grain boundaries 
650 4 |a p-n junctions 
700 1 |a Chugh, Manjusha  |e verfasserin  |4 aut 
700 1 |a Sozzi, Giovanna  |e verfasserin  |4 aut 
700 1 |a Kanevce, Ana  |e verfasserin  |4 aut 
700 1 |a Kühne, Thomas D  |e verfasserin  |4 aut 
700 1 |a Mirhosseini, Hossein  |e verfasserin  |4 aut 
700 1 |a Wuerz, Roland  |e verfasserin  |4 aut 
700 1 |a Cojocaru-Mirédin, Oana  |e verfasserin  |4 aut 
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773 1 8 |g volume:34  |g year:2022  |g number:37  |g day:20  |g month:09  |g pages:e2203954 
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