Inverted (p–i–n) perovskite solar cells using a low temperature processed TiOx interlayer. Issue 44 (10th July 2018)

• Record Type: Journal Article
• Authors: Hailegnaw, Bekele; Adam, Getachew; Heilbrunner, Herwig; Apaydin, Dogukan H.; Ulbricht, Christoph; Sariciftci, Niyazi Serdar; Scharber, Markus C.
• Is Part Of: RSC advances. Volume 8:Issue 44(2018)
• Page Start: 24836
• Page End: 24846
• Publication Date: 2018-07-10
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c8ra03993c
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A low temperature solution processed TiO x interlayer was used to improve the performance and stability of mixed-cation–mixed-halide perovskite solar cells. Abstract : In this article, we present the improvement in device performance and stability as well as reduction in hysteresis of inverted mixed-cation–mixed-halide perovskite solar cells (PSCs) using a low temperature, solution processed titanium oxide (TiO x ) interlayer between [6, 6]-phenyl-C61 butyric acid methyl ester (PCBM) and an Al electrode. Upon applying a TiO x interlayer, device resistance was reduced compared to that of the control devices, which results in improved rectification of the characteristic current density–voltage ( J – V ) curve and improved overall performance of the device. PSCs with the TiO x interlayer show an open-circuit voltage ( V oc ) of around 1.1 V, current density ( J sc ) of around 21 mA cm −2, fill factor (FF) of around 72% and enhanced power conversion efficiency (PCE) of 16% under AM1.5 solar spectrum. Moreover, devices with the TiO x interlayer show improved stability compared to devices without the TiO x interlayer. This finding reveals the dual role of the TiO x interlayer in improving device performance and stability.