Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/39267
Title: Organic ammonium iodide salts as passivation for buried interface enables efficient and stable NiOx based p-i-n perovskite solar cells
Authors: LAMMAR, Stijn 
VAN GOMPEL, Wouter 
LENAERS, Stijn 
Mertens, Martijn
BOYEN, Hans-Gerd 
DESTA, Derese 
Hadipour, Afshin
LUTSEN, Laurence 
VANDERZANDE, Dirk 
KRISHNA, Anurag 
Abdulraheem, Yaser
AERNOUTS, Tom 
POORTMANS, Jef 
Issue Date: 2022
Publisher: 
Source: Journal of Materials Chemistry C,
Series/Report: Celebrating ten years of Journal of Materials Chemistry C
Status: Early view
Abstract: The interfaces between a halide perovskite absorber film and its charge transporting layers have been identified as one of the key bottlenecks for achieving high performance and stability. Herein we report a benzothieno[3,2-b]benzothiophene (BTBT) derivative and a carbazole derivative to passivate the interface between the sputtered NiOx and the halide perovskite in p-in perovskite solar cells (PSCs). The treatment of the NiOx with the BTBT derivative significantly enhances the open-circuit voltage (Voc), boosting the champion power conversion efficiency (PCE) from 16.6% to 18.6%. We carry out an in-depth analysis of the interface employing a lift-off procedure revealing that the BTBT molecules reside at the bottom interface and successfully suppress a (redox) reaction at this interface. As a result of the improved interface quality, the stability of the PSCs is superior under maximum power point (MPP) conditions and in ambient conditions, retaining 89% of the initial PCE after 250 hours at 25% relative humidity and 95% after 1 hour under continuous MPP tracking (MPPT).
Document URI: http://hdl.handle.net/1942/39267
ISSN: 2050-7526
e-ISSN: 2050-7534
DOI: 10.1039/D2TC04215K
ISI #: 000911834100001
Rights: The Royal Society of Chemistry 2023
Category: A1
Type: Journal Contribution
Appears in Collections:Research publications

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