• Dr. Sumita Sengupta

CuInS2 thin films with various rare earth dopant as well as flux added and undoped films were grown on cleaned glass substrates at 800C by chemical bath method. Transmittance and absorbance spectra of various films were recorded in the observable region between 300 nm to 900 nm. Optical constants such as Eg, k, n, ε1 and ε2 were estimated from these spectra. Except undoped film other film shows high transmittance (~ 60 - 82 %), low absorbance in the observable region (500 - 900 nm). The optical band gap energy was found to be in the range 2.19 –3.5 eV for undoped and rare earth doped films respectively.The value of α obtained in the observable range (300-700nm) is very high(~104) in all films. This high value indicates that synthesized films are of paramount interest for the fabrication of high absorptive layers of solar cells.

CuInS2, Chemical bath, Observable region, Rare earth, Dopant.

"OPTICAL PROPERTIES OF CHEMICAL BATH DEPOSITED CuInS2 THIN FILMS WITH RARE DOPANT", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.10, Issue 5, page no.f405-f411, May-2023, Available :http://www.jetir.org/papers/JETIR2305560.pdf

"OPTICAL PROPERTIES OF CHEMICAL BATH DEPOSITED CuInS2 THIN FILMS WITH RARE DOPANT", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.10, Issue 5, page no. ppf405-f411, May-2023, Available at : http://www.jetir.org/papers/JETIR2305560.pdf