Fabrication and Analysis Phonon Mode of Barium Strontium Titanate-Chlorophyll Thin Film (chlorophyll extract: green spinach, cassava, green choy sum)

摘要

The thin film of Barium Strontium Titanate (Ba_(0.2)Sr_(0.8)TiO_3) blended of chlorophyll (chlorophyll extract: green choy sum, green spinach, and papaya) have been fabricated. The deposition film using chemical solution deposition method (spin coating). The specified annealing temperature is 850°C for 8 hours (holding time, the effect of the high-temperature heating). Observation about the blending effect of chlorophyll by applying chlorophyll variation 5% green choy sum, 5% green spinach, and 5% papaya on the barium strontium titanate (Ba_(0.2)Sr_(0.8)TiO_3) thin film. Barium Strontium Titanate (Ba_(0.2)Sr_(0.8)TiO_3) thin films were analyzed using UV-Vis spectroscopy and Micro-Raman spectroscopy. UV-Vis spectroscopy shows that the green spinach has a more significant impact in decreasing energy gap compared to the other doping. Micro-Raman spectroscopy demonstrated a Raman shifts with symmetry of phonon mode in BST blend of the chlorophyll of green choy sum, green spinach, and papaya leaves.