Ferroelectric Properties of Perovskite Thin Films and Their Implications for Solar Energy Conversion

Advanced Materials
Holger RöhmAlexander Colsmann

Abstract

Whether or not methylammonium lead iodide (MAPbI3 ) is a ferroelectric semiconductor has caused controversy in the literature, fueled by many misunderstandings and imprecise definitions. Correlating recent literature reports and generic crystal properties with the authors' experimental evidence, the authors show that MAPbI3 thin-films are indeed semiconducting ferroelectrics and exhibit spontaneous polarization upon transition from the cubic high-temperature phase to the tetragonal phase at room temperature. The polarization is predominantly oriented in-plane and is organized in characteristic domains as probed with piezoresponse force microscopy. Drift-diffusion simulations based on experimental patterns of polarized domains indicate a reduction of the Shockley-Read-Hall recombination of charge carriers within the perovskite grains due to the ferroelectric built-in field and allow reproduction of the electrical solar cell properties.

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Citations

Aug 26, 2020·Nature Materials·Adam D WrightLaura M Herz
Oct 8, 2020·Scientific Reports·Joachim BreternitzSusan Schorr
Jan 14, 2021·IScience·Jin-Wook LeeHyunjung Shin
Jan 20, 2021·Physical Chemistry Chemical Physics : PCCP·Alessandra Geddo LehmannGiovanni Bongiovanni
Apr 4, 2021·Materials·Justinas JanuskeviciusAivaras Kareiva
Jun 4, 2021·Chemical Society Reviews·Han-Yue ZhangRen-Gen Xiong
Jul 4, 2019·ACS Nano·Liam CollinsRoger Proksch
Aug 14, 2020·The Journal of Physical Chemistry Letters·Lu QiaoOleg V Prezhdo
Jan 7, 2020·Journal of the American Chemical Society·Lina LiJunhua Luo
Sep 1, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·F B MinussiE B Araújo
Sep 19, 2021·Nature Communications·Shulin ChenPeng Gao

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