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Title:Three-dimensional surface image of halide perovskite
Author(s):Sharma, Aastha
Subject(s):Solar Energy
Halide Perovskite
Abstract:For my doctoral research in Materials Chemistry, I aim to understand the fundamental processes that occur when materials such as hybrid organic-inorganic halide perovskites convert solar energy to electricity. Despite the low-cost for fabrication and strong light harvesting capability, perovskite-based devices require further study given they are not yet stable enough for commercialization. Understanding fundamental photophysics is crucial for elucidating the working mechanisms of these devices. Shown here is a 3D atomic force microscope (AFM) image of methylammonium lead bromide perovskite thin film with an average roughness of ~10 nm. AFM is a powerful technique used to obtain high-resolution surface topographical image of nanoscale films. I use AFM as a sample screening technique before I perform more challenging sensitive laser-based experiments. Lower the roughness of the films, the better photophysical properties! While this sample fell in my “mediocre quality” category, the image is a reminder of “defective beauty” and the value of finding it in our not so-perfect everyday life, where we strive to eventually attain that near-perfection. These nanoscale 3D topographical images of my samples beautifully capture the macro scale of human life: there is beauty in both highs and lows; it just depends how they are perceived.
Issue Date:2021
Description:I would like to thank Jessica Spear, Research Scientist at Materials Research Laboratory (MRL) for her help with AFM measurement.
Rights Information:Copyright 2021 Aastha Sharma
Date Available in IDEALS:2021-04-12

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