Rational Design of Double Hole Transfer Layers for Efficient CdTe Nanocrystal Solar Cells.
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| Title: | Rational Design of Double Hole Transfer Layers for Efficient CdTe Nanocrystal Solar Cells. |
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| Authors: | Zhou, Zheng1 (AUTHOR), Wang, Xinyi1,2 (AUTHOR), Huang, Jielin1 (AUTHOR), Huang, Qichuan1,2 (AUTHOR), Qin, Donghuan1,2 (AUTHOR) qindh@scut.edu.cn |
| Source: | Nanomaterials (2079-4991). Feb2026, Vol. 16 Issue 4, p239. 11p. |
| Subjects: | Charge transfer, Solar cell efficiency, Photovoltaic power generation, Solar cells, Hole mobility, Polymers, Inorganic compounds |
| Abstract: | Energy losses induced by inefficient charge transfer and large energy-level offsets at the interface limit the efficiency of CdTe nanocrystal (NC) solar cells. In this work, organic poly(triaryl amine) (PTAA) and inorganic CuI which form double hole transport layers (HTLs) are first proposed to improve the charge transfer capability of hole transport layers (HTLs) and reduce the band offset at the interface of CdTe NCs. The introduced CuI improves carrier mobility, while PTAA reduces interface recombination and reinforces the inner built-in field, resulting in low energy loss from the CdTe NC active layer to the contact electrode. Photovoltaic devices using these modified back contacts show increases in both open-circuit voltage and short-circuit current, compared to a controlled device without HTL. The CdTe NCs utilizing CuI-PTAA double HTLs demonstrate a high power conversion efficiency (PCE) of 7.36%. High stability is also demonstrated, with PCE loss being less than 5% after tracking for 30 days. This work provides an effective way to minimize energy loss at the interface of the back contact in inverted CdTe NCs solar cells, by incorporating proper hole transfer layer design. [ABSTRACT FROM AUTHOR] |
| Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 192039956 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Rational Design of Double Hole Transfer Layers for Efficient CdTe Nanocrystal Solar Cells. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Zhou%2C+Zheng%22">Zhou, Zheng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Xinyi%22">Wang, Xinyi</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Huang%2C+Jielin%22">Huang, Jielin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Huang%2C+Qichuan%22">Huang, Qichuan</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Qin%2C+Donghuan%22">Qin, Donghuan</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> qindh@scut.edu.cn</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. Feb2026, Vol. 16 Issue 4, p239. 11p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Charge+transfer%22">Charge transfer</searchLink><br /><searchLink fieldCode="DE" term="%22Solar+cell+efficiency%22">Solar cell efficiency</searchLink><br /><searchLink fieldCode="DE" term="%22Photovoltaic+power+generation%22">Photovoltaic power generation</searchLink><br /><searchLink fieldCode="DE" term="%22Solar+cells%22">Solar cells</searchLink><br /><searchLink fieldCode="DE" term="%22Hole+mobility%22">Hole mobility</searchLink><br /><searchLink fieldCode="DE" term="%22Polymers%22">Polymers</searchLink><br /><searchLink fieldCode="DE" term="%22Inorganic+compounds%22">Inorganic compounds</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Energy losses induced by inefficient charge transfer and large energy-level offsets at the interface limit the efficiency of CdTe nanocrystal (NC) solar cells. In this work, organic poly(triaryl amine) (PTAA) and inorganic CuI which form double hole transport layers (HTLs) are first proposed to improve the charge transfer capability of hole transport layers (HTLs) and reduce the band offset at the interface of CdTe NCs. The introduced CuI improves carrier mobility, while PTAA reduces interface recombination and reinforces the inner built-in field, resulting in low energy loss from the CdTe NC active layer to the contact electrode. Photovoltaic devices using these modified back contacts show increases in both open-circuit voltage and short-circuit current, compared to a controlled device without HTL. The CdTe NCs utilizing CuI-PTAA double HTLs demonstrate a high power conversion efficiency (PCE) of 7.36%. High stability is also demonstrated, with PCE loss being less than 5% after tracking for 30 days. This work provides an effective way to minimize energy loss at the interface of the back contact in inverted CdTe NCs solar cells, by incorporating proper hole transfer layer design. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/nano16040239 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 11 StartPage: 239 Subjects: – SubjectFull: Charge transfer Type: general – SubjectFull: Solar cell efficiency Type: general – SubjectFull: Photovoltaic power generation Type: general – SubjectFull: Solar cells Type: general – SubjectFull: Hole mobility Type: general – SubjectFull: Polymers Type: general – SubjectFull: Inorganic compounds Type: general Titles: – TitleFull: Rational Design of Double Hole Transfer Layers for Efficient CdTe Nanocrystal Solar Cells. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Zhou, Zheng – PersonEntity: Name: NameFull: Wang, Xinyi – PersonEntity: Name: NameFull: Huang, Jielin – PersonEntity: Name: NameFull: Huang, Qichuan – PersonEntity: Name: NameFull: Qin, Donghuan IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 02 Text: Feb2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 20794991 Numbering: – Type: volume Value: 16 – Type: issue Value: 4 Titles: – TitleFull: Nanomaterials (2079-4991) Type: main |
| ResultId | 1 |
