Low-Temperature Processed Electron Collection Layers of Graphene/TiO2 Nanocomposites in Thin Film Perovskite Solar Cells

被引:919
作者
Wang, Jacob Tse-Wei [1 ]
Ball, James M. [1 ]
Barea, Eva M. [2 ]
Abate, Antonio [1 ]
Alexander-Webber, Jack A. [1 ]
Huang, Jian [1 ]
Saliba, Michael [1 ]
Mora-Sero, Ivan [2 ]
Bisquert, Juan [2 ]
Snaith, Henry J. [1 ]
Nicholas, Robin J. [1 ]
机构
[1] Univ Oxford, Dept Phys, Clarendon Lab, Parks Rd, Oxford OX1 3PU, England
[2] Univ Jaume 1, Dept Fis, Photovolta & Optoelect Devices Grp, Castellon de La Plana 12071, Spain
基金
英国工程与自然科学研究理事会;
关键词
Graphene; TiO2; perovskite; hybrid photovoltaics; nanocomposites; LOW-COST; THERMAL-CONDUCTIVITY; FABRICATION; EFFICIENT; EXFOLIATION; RUTILE;
D O I
10.1021/nl403997a
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The highest efficiencies in solution-processable perovskite-based solar cells have been achieved using an electron collection layer that requires sintering at 500 degrees C. This is unfavorable for low-cost production, applications on plastic substrates, and multijunction device architectures. Here we report a low-cost, solution-based deposition procedure utilizing nanocomposites of graphene and TiO2 nanoparticles as the electron collection layers in meso-superstructured perovskite solar cells. The graphene nanoflakes provide superior charge-collection in the nanocomposites, enabling the entire device to be fabricated at temperatures no higher than 150 degrees C. These solar cells show remarkable photovoltaic performance with a power conversion efficiency up to 15.6%. This work demonstrates that graphene/metal oxide nanocomposites have the potential to contribute significantly toward the development of low-cost solar cells.
引用
收藏
页码:724 / 730
页数:7
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