Low-temperature processed electron collection layers of graphene/TiO2 nanocomposites in thin film perovskite solar cells

Nano Letters
Jacob Tse-Wei WangRobin J Nicholas

Abstract

The highest efficiencies in solution-processable perovskite-based solar cells have been achieved using an electron collection layer that requires sintering at 500 °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 °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.

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Citations

Feb 20, 2014·The Journal of Physical Chemistry Letters·Emilio J Juarez-PerezIvan Mora-Sero
Jan 8, 2016·Journal of the American Chemical Society·Kian Ping LohJishan Wu
Jan 12, 2016·Nature Communications·Yaowen LiYongfang Li
Aug 12, 2015·The Journal of Physical Chemistry Letters·Kai WangTingli Ma
Feb 25, 2015·Nano Letters·Jeong-Hyeok ImNam-Gyu Park
Mar 13, 2015·ACS Applied Materials & Interfaces·Yingzhuang MaDechun Zou
Jan 31, 2015·ACS Applied Materials & Interfaces·Weiwei WangWanli Ma
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Mar 11, 2016·ACS Applied Materials & Interfaces·Xingyue ZhaoHong Lin
May 20, 2015·ACS Applied Materials & Interfaces·Golnaz SadoughiHenry J Snaith
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May 8, 2015·ACS Applied Materials & Interfaces·Feng LinChaiwat Engtrakul
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Feb 26, 2016·Scientific Reports·Snehangshu PatraFrédéric Sauvage

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