High quality perovskite thin films induced by crystal seeds with lead monoxide interfacial engineering

Interfacial engineering is an important method to achieve compact and smooth high-quality perovskite films in a one-step method. In this work, we first demonstrate that lead monoxide (PbO) as an interfacial modification material could convert to perovskite crystal seeds and induce the growth of the...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2016-01, Vol.4 (43), p.16913-16919
Main Authors: Liang, Xingyao, Li, Wenzhe, Li, Jiangwei, Niu, Guangda, Wang, Liduo
Format: Article
Language:English
Subjects:
Crystals
Devices
Energy conversion efficiency
Grain size
Perovskites
Seeds
Thin films
Titanium dioxide
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Summary:Interfacial engineering is an important method to achieve compact and smooth high-quality perovskite films in a one-step method. In this work, we first demonstrate that lead monoxide (PbO) as an interfacial modification material could convert to perovskite crystal seeds and induce the growth of the CH3NH3PbI3-xClx absorber layer. The introduction of the perovskite crystal seeds resulted in a dramatically enhanced coverage and a large grain size of the perovskite films. The PL lifetime measurements verified reduced trap states of the perovskite thin films and enhanced charge transfer at the TiO2/perovskite interface. With a high quality perovskite thin film, the planar perovskite solar cell showed a remarkably improved power conversion efficiency (PCE) of 17.03%. Moreover, the device with PbO as an interfacial layer exhibited superior UV-stability, maintaining 60% of the initial PCE under intensive UV irradiation for 180 min while the control device was almost exhausted.
ISSN:2050-7488
2050-7496
DOI:10.1039/c6ta06735b