Synthesis and characterization of amorphous aluminum oxide thin films prepared by spray pyrolysis: Effects of substrate temperature

► Reaching an ascending trends for absorption coefficient in both molarities ► Achieving both smooth and rough structures at same molarity (0.25 M) ► Reaping desired transparency (over 70%) along with low band gap (lower than 4 eV) ► Calculating high real dielectric constants (as high as 6.41)