Jump to main content
Jump to site search

Issue 45, 2017
Previous Article Next Article

A chemical approach to perovskite solar cells: control of electron-transporting mesoporous TiO2 and utilization of nanocarbon materials

Author affiliations

Abstract

Over the past several years, organometal halide perovskite solar cells (PSCs) have attracted considerable interest from the scientific research community because of their potential as promising photovoltaic devices for use in renewable energy production. To date, high power conversion efficiencies (PCEs) of more than 20% have been primarily achieved with mesoscopic-structured PSCs, where a mesoporous TiO2 (mTiO2) layer is incorporated as an electron-transporting mesoporous scaffold into the perovskite crystal, in addition to a compact TiO2 (cTiO2) as an electron-transporting layer (ETL). In this Perspective, we first summarize recent research on the preparation strategies of the mTiO2 layer with a high electron transport capability by facile sol–gel methods instead of the conventional nanoparticle approach. The importance of the control of the pore size and grain boundaries of the mTiO2 in achieving high PCEs for PSCs is discussed. In addition, an alternative method to improve the electron transport in the mTiO2 layer via the incorporation of highly conductive nanocarbon materials, such as two-dimensional (2D) graphene and one-dimensional (1D) carbon nanotubes, is also summarized. Finally, we highlight the utilization of zero-dimensional (0D) nanocarbon, i.e., fullerenes, as an n-type semiconducting material in mesostructure-free planar PSCs, which avoids high-temperature sintering during the fabrication of an ETL.

Graphical abstract: A chemical approach to perovskite solar cells: control of electron-transporting mesoporous TiO2 and utilization of nanocarbon materials

Back to tab navigation

Article information


Submitted
05 Jul 2017
Accepted
11 Oct 2017
First published
26 Oct 2017

Dalton Trans., 2017,46, 15615-15627
Article type
Perspective

A chemical approach to perovskite solar cells: control of electron-transporting mesoporous TiO2 and utilization of nanocarbon materials

T. Umeyama and H. Imahori, Dalton Trans., 2017, 46, 15615
DOI: 10.1039/C7DT02421E

Social activity

Search articles by author

Spotlight

Advertisements