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

A1 Journal article (refereed)

Internal Authors/Editors

Publication Details

List of Authors: Paola Vivo, Anniina Ojanperä, Jan-Henrik Smått, Simon Sandén, Syed Ghufran Hashmid, Kimmo Kaunisto, Petri Ihalainen, Muhammad Talha Masood, Ronald Österbacka, Peter D. Lund, Helge Lemmetyinen
Publication year: 2017
Journal: Organic Electronics
Volume number: 41
Start page: 287
End page: 293


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.

Last updated on 2020-08-08 at 06:46