Perovskite Solar Cells Employing Dopant-Free Organic Hole Transport Materials with Tunable Energy Levels

Perovskite Solar Cells Employing Dopant-Free Organic Hole Transport Materials with Tunable Energy Levels

Conjugated small‐molecule hole‐transport materials (HTMs) with tunable energy levels are designed and synthesized for efficient perovskite solar cells. A champion device with efficiency of 16.2% is demonstrated using a dopant‐free DERDTS‐TBDT HTM, while the DORDTS‐DFBT‐HTM‐based device shows an infe...

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Veröffentlicht in:Advanced materials (Weinheim) 2016-01, Vol.28 (3), p.440-446
Hauptverfasser: Liu, Yongsheng, Hong, Ziruo, Chen, Qi, Chen, Huajun, Chang, Wei-Hsuan, Yang, Yang (Michael), Song, Tze-Bin, Yang, Yang
Format: Artikel
Sprache:eng
Schlagworte:
charge transport
Devices
dopant-free small molecules
Energy levels
hole conductors
Hole mobility
perovskite
Perovskites
Photovoltaic cells
Solar cells
Transport
Valence band
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Zusammenfassung:Conjugated small‐molecule hole‐transport materials (HTMs) with tunable energy levels are designed and synthesized for efficient perovskite solar cells. A champion device with efficiency of 16.2% is demonstrated using a dopant‐free DERDTS‐TBDT HTM, while the DORDTS‐DFBT‐HTM‐based device shows an inferior performance of 6.2% due to its low hole mobility and unmatched HOMO level with the valence band of perovskite film.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201504293