Synthesis and Characterization of Polyurethane as an Additive to Enhance the Stability and Performance for Perovskite Solar Cell
Date Issued
2015
Date
2015
Author(s)
Yu, Chung-Chiang
Abstract
In this study, a kind of polyurethane which contains the polyethylene glycol segments is successfully synthesized. By adding the synthesized polyurethane into the perovskite precursor solution which composed by Lead (Π) chloride (PbCl2) and methylammonium iodide (MAI) we can enhance the stability and power efficiency of perovskite solar cell. To understand the change of light-harvesting ability of perovskite crystal with different amount of polyurethane additive, an UV/Visible spectroscopy (UV-vis) is chosen. X-Ray Diffraction (XRD) are used to measure the change of perovskite crystal’s intensity with different amount of polyurethane additive. Scanning electron microscope (SEM) helps us know how does the polyurethane affects the film formation ability of perovskite precursor solution. We use the Atomic force microscopy (AFM) to observe the change of surface roughness with different ratio of polyurethane additive. By adding the polyurethane in a 100:1 (perovskite:polyurethane) weight ratio, the best power efficiency can be enhance from 8.08 % up to 13.16 % which is 60 % increase compared to the standard. The average power efficiency can reach 12.67 % nearly twice of the standard (6.5 %). The fill factor can be reach almost 70 % and the standard derivation is reduced from 1.80 to 0.43.
Subjects
perovskite solar cell
polyurethane
additive
stability
Type
thesis