Impact of Thickness on the Optical Properties of Selenium Thin Films

Objectives: The primary objective of this investigation is to make a systematic study on the impact thickness optical properties, such as energy gap, absorption coefficient, density etc., for selenium thin films. Understanding band gap and its influence film utmost importance in acquiring intended electrical characterization semiconducting Materials methods: Ultra-purity (99.99 %) was deposited glass substrates. During deposition, substrate with holder were rotated constant speed have smooth coating. Results discussions: XRD findings indicate that amorphous nature. found be decreasing form (2.3 2eV) rise interval (200 1000 nm). obeys inverse square law respect thickness. Conclusion: We properly grown films Se below De Broglie wavelength limit by thermal evaporation vacuum. varies directly coefficients (0.5 4) × 107m-1. AFM results confirmed nano-size increases increase Both grain boundaries sub-grain regions are clearly visible SEM micrographs