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

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

doi:10.1016/j.orgel.2016.11.017

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

Paola Vivo (Corresponding Author), Anniina Ojanperä, Jan-Henrik Smått, Simon Sandén, Syed Ghufran Hashmi, Kimmo Kaunisto, Petri Ihalainen, Muhammad Talha Masood, Ronald Österbacka, Peter Lund, Helge Lemmetyinen

Research output: Contribution to journal › Article › Scientific › peer-review

37 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	287-293
Journal	Organic Electronics
Volume	41
DOIs	https://doi.org/10.1016/j.orgel.2016.11.017
Publication status	Published - 1 Feb 2017
MoE publication type	A1 Journal article-refereed

Funding

Academy of Finland is gratefully acknowledged for funding (decisions No. 259310 and No. 279055). P.V. and G.H. are grateful for their Post-Doctoral Fellowships (Academy of Finland, decisions No. 268672 and No. 287641, respectively). J-H.S. also acknowledges financial support from Magnus Ehrnrooth Foundation. M.T.M. thanks National University of Science & Technology (NUST) of Pakistan for funding.

Keywords

compact layer
hysteresis
perovskite solar cells
stability
TiCl4
TiO2
TiCl
TiO

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.orgel.2016.11.017

Cite this

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title = "Influence of TiO2 compact layer precursor on the performance of perovskite solar cells",

abstract = "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.",

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AU - Hashmi, Syed Ghufran

AU - Kaunisto, Kimmo

AU - Ihalainen, Petri

AU - Masood, Muhammad Talha

AU - Österbacka, Ronald

AU - Lund, Peter

AU - Lemmetyinen, Helge

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