Giant photostriction in organic–inorganic lead halide perovskites

Yang Zhou, Lu You (), Shiwei Wang, Zhiliang Ku, Hongjin Fan, Daniel Schmidt, Andrivo Rusydi, Lei Chang, Le Wang, Peng Ren, Liufang Chen, Guoliang Yuan, Lang Chen and Junling Wang ()
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Yang Zhou: School of Materials Science and Engineering, Nanyang Technological University, Block N4.1-02-24, 50 Nanyang Avenue, Singapore 639798, Singapore
Lu You: School of Materials Science and Engineering, Nanyang Technological University, Block N4.1-02-24, 50 Nanyang Avenue, Singapore 639798, Singapore
Shiwei Wang: School of Materials Science and Engineering, Nanyang Technological University, Block N4.1-02-24, 50 Nanyang Avenue, Singapore 639798, Singapore
Zhiliang Ku: School of Physical and Mathematical Sciences, Nanyang Technological University
Hongjin Fan: School of Physical and Mathematical Sciences, Nanyang Technological University
Daniel Schmidt: Singapore Synchrotron Light Source, National University of Singapore
Andrivo Rusydi: Singapore Synchrotron Light Source, National University of Singapore
Lei Chang: School of Materials Science and Engineering, Nanyang Technological University, Block N4.1-02-24, 50 Nanyang Avenue, Singapore 639798, Singapore
Le Wang: School of Materials Science and Engineering, Nanyang Technological University, Block N4.1-02-24, 50 Nanyang Avenue, Singapore 639798, Singapore
Peng Ren: School of Materials Science and Engineering, Nanyang Technological University, Block N4.1-02-24, 50 Nanyang Avenue, Singapore 639798, Singapore
Liufang Chen: Nanjing University of Science and Technology
Guoliang Yuan: Nanjing University of Science and Technology
Lang Chen: South University of Science and Technology of China
Junling Wang: School of Materials Science and Engineering, Nanyang Technological University, Block N4.1-02-24, 50 Nanyang Avenue, Singapore 639798, Singapore

Nature Communications, 2016, vol. 7, issue 1, 1-8

Abstract: Abstract Among the many materials investigated for next-generation photovoltaic cells, organic–inorganic lead halide perovskites have demonstrated great potential thanks to their high power conversion efficiency and solution processability. Within a short period of about 5 years, the efficiency of solar cells based on these materials has increased dramatically from 3.8 to over 20%. Despite the tremendous progress in device performance, much less is known about the underlying photophysics involving charge–orbital–lattice interactions and the role of the organic molecules in this hybrid material remains poorly understood. Here, we report a giant photostrictive response, that is, light-induced lattice change, of >1,200 p.p.m. in methylammonium lead iodide, which could be the key to understand its superior optical properties. The strong photon-lattice coupling also opens up the possibility of employing these materials in wireless opto-mechanical devices.

Date: 2016
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DOI: 10.1038/ncomms11193

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