Details

Autor(en) / Beteiligte

• Vivo, Paola
• Ojanperä, Anniina
• Smått, Jan-Henrik
• Sandén, Simon
• Hashmi, Syed Ghufran
• Kaunisto, Kimmo
• Ihalainen, Petri
• Masood, Muhammad Talha
• Österbacka, Ronald
• Lund, Peter D.
• Lemmetyinen, Helge

Titel

Influence of TiO2 compact layer precursor on the performance of perovskite solar cells

Ist Teil von

• Organic electronics, 2017-02, Vol.41, p.287-293

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2017

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• The optimization of the hole-blocking layer in perovskite solar cells (PSC), typically based on TiO2, is crucial, as it strongly affects the device performance. In this work, we thoroughly characterize the thickness, roughness, and crystal structure of a set of TiO2 compact layers produced by spin coating of different precursor sols and correlate the choice of the TiO2 precursor to the photovoltaic performance of the PSC. By replacing the commonly used titanium isopropoxide (TTIP) blocking layer precursor with titanium tetrachloride (TiCl4), a clear enhancement in the PSC performance was observed, particularly in the hysteresis behavior and stability. The results from the morphological/structural analysis and transient photoluminescence studies clarify the different behavior of the compact layers in PSCs. [Display omitted] •TiO2 compact layers produced by spin coating of different precursors are compared.•TiCl4-compact layer is used in mesoscopic architectures for the first time.•Larger crystals in TiCl4-compact layer compared to Ti-isopropoxide-compact layers.•TiCl4-based cells exhibit the longest lifetime and negligible hysteresis.