Fast Thermal Annealing of CH3NH3PbI3-xClx Films for Improving Hybrid Photovoltaics

Jian Hong Zhao; Lei Ming Yu; Tao Yu Zou; Zhen Fang Qiao; Li Luo; Yu Min Zhang; Xiao Yan Wang; Hai Wang

doi:10.4028/www.scientific.net/KEM.727.923

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 727Fast Thermal Annealing of CH3NH3PbI3-xClx Films...

Fast Thermal Annealing of CH₃NH₃PbI_3-xCl_x Films for Improving Hybrid Photovoltaics

Abstract:

Organic-inorganic hybrid perovskite materials offer the potential for realization of low-cost and flexible next-generation solar cells fabricated by low-temperature solution processing. Although efficiencies of perovskite solar cells have dramatically improved up to 22.1% within the past 6 years, there is still considerable room for further improvement in device efficiency through development of smooth and large grain size perovskite films. Commonly, the smooth perovskite layers and large grains are alternative to CH₃NH₃PbI_3-xCl_x. However, the previous one-step fabrication of CH₃NH₃PbI_3-xCl_x using PbCl₂ needs long annealing time. Herein, the active layer, a noncontinuous CH₃NH₃PbI_3-xCl_x film with micrometre-level crystalline grain, was fabricated using a one-step spin-coating process followed by high-temperature annealing and exhibited an increased efficiency of 9.93%. This finding enables the formation of larger grain size perovskite films and the demonstration of efficient perovskite heterojunction solar cells.

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Key Engineering Materials (Volume 727)

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923-928

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https://doi.org/10.4028/www.scientific.net/KEM.727.923

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January 2017

Authors:

Jian Hong Zhao, Lei Ming Yu, Tao Yu Zou, Zhen Fang Qiao, Li Luo, Yu Min Zhang, Xiao Yan Wang, Hai Wang*

Keywords:

CH₃NH₃PbI_3-xCl_x, Heterojunction, Perovskite, Thermal Annealing

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