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

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Journal Adv Mater
Date 2015 Nov 21
PMID 26588665
Citations 20
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Abstract

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.

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