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Revealing and reducing the possible recombination loss within TiO2 compact layer by incorporating MgO layer in perovskite solar cells

descriptionPublicationkeyboard_double_arrow_right Article , Journal 01 Oct 2016Publisher:Elsevier BVJournal:Solar Energy, volume 136, pages 379-384 (issn: 0038-092X,

Authors: Ashish Kulkarni; Yoshitaka Sanehira; Hsin-Wei Chen; Ajay Kumar Jena; Masashi Ikegami; Tsutomu Miyasaka;

doi: 10.1016/j.solener.2016.07.019

Revealing and reducing the possible recombination loss within TiO2 compact layer by incorporating MgO layer in perovskite solar cells

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Abstract

Abstract Here, we report an origin of loss in open circuit voltage (Voc) in perovskite solar cells due to the possible trap-assisted recombination within the widely used TiO2 compact layer (CL) and at its interface with FTO substrate. A thin layer (TL) of MgO was employed to investigate the recombination mechanism. MgO in place of TiO2 CL (50–60 nm) enhances Voc of the cell significantly while the MgO layer coated on TiO2 CL (TiO2-MgO bilayer) does not change the Voc much. In combination with open-circuit voltage decay (OCVD) measurements, we reveal that recombination at FTO/TiO2 interface is a major factor regulating the voltage and efficiency of TiO2-based perovskite solar cells.

Related Organizations

Toin University of Yokohama
Japan
Toin University of Yokohama
Japan

Keywords

Materials Science(all), Renewable Energy, Sustainability and the Environment

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