Self-Assembly Atomic Stacking Transport Layer of 2D Layered Titania for Perovskite Solar Cells with Extended UV Stability
Journal
Advanced Energy Materials
Journal Volume
8
Journal Issue
2
Date Issued
2018
Author(s)
Chen T.-P.
Lin C.-W.
Li S.-S.
Tsai Y.-H.
Wen C.-Y.
Lin W.J.
Hsiao F.-M.
Chiu Y.-P.
Tsukagoshi K.
Osada M.
Sasaki T.
Abstract
A novel atomic stacking transporting layer (ASTL) based on 2D atomic sheets of titania (Ti1−δO2) is demonstrated in organic–inorganic lead halide perovskite solar cells. The atomically thin ASTL of 2D titania, which is fabricated using a solution-processed self-assembly atomic layer-by-layer deposition technique, exhibits the unique features of high UV transparency and negligible (or very low) oxygen vacancies, making it a promising electron transporting material in the development of stable and high-performance perovskite solar cells. In particular, the solution-processable atomically thin ASTL of 2D titania atomic sheets shows superior inhibition of UV degradation of perovskite solar cell devices, compared to the conventional high-temperature sintered TiO2 counterpart, which usually causes the notorious instability of devices under UV irradiation. The discovery opens up a new dimension to utilize the 2D layered materials with a great variety of homostructrual or heterostructural atomic stacking architectures to be integrated with the fabrication of large-area photovoltaic or optoelectronic devices based on the solution processes. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
SDGs
Other Subjects
Atoms; Convergence of numerical methods; Deposition; Irradiation; Optoelectronic devices; Oxygen vacancies; Perovskite; Perovskite solar cells; Photodegradation; Self assembly; Temperature; Titanium dioxide; Electron transporting materials; Low- temperature process; Organic-inorganic; Solution process; Solution processable; Solution-processed; Stacking architecture; UV transparencies; Solar cells
Publisher
Wiley-VCH Verlag
Type
journal article