Three-dimensional surface image of halide perovskite

Sharma, Aastha

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https://hdl.handle.net/2142/109788 Copy

Description

Title

Three-dimensional surface image of halide perovskite

Author(s)

Sharma, Aastha

Issue Date

2021

Keyword(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.

Type of Resource

Image

Language

eng

Permalink

http://hdl.handle.net/2142/109788

Copyright and License Information

Copyright 2021 Aastha Sharma

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