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Home  >  Volume 35

Sımple Method for the Determınatıon of Band Gap of a Nanopowdered Sample Usıng Kubelka Munk Theory by Sabiu Said Abdullahi, Sadik Güner,Yuksel Koseoglu, Ibrahim Murtala Musa, Bala Ismai Adamu and Mahmud I. Abdulhamid (pages 241-246)
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Diffuse reflectant spectra (DR) is used to present a simple method for the determination of band gap ofthe synthesized MnxCo0.1Zn0.9-xO nanopowdered samples prepared with different doping concentration (x=0.0, 0.05, 0.1, 0.15, and 0.2).The idea was originated from Kubelka-Munk theory which describes the behavior of light travelling inside a light scattering sample. The band gap is calculated by plotting the graph of the squareproduct of the absorption coefficient and energy(αE)2 versusenergyE,((αE)2 vs E). The band gap can be obtained byextending the straight line  from the straight segment of the graph touching the E axis, the bandgap of the sample was found to have decreasing values of 3.24, 3.21, 3.17, 3.16, and 3.02 eV values with respect to Mn content of x=0, 0.05, 0.10, 0.15, 0.20 at. %, respectively.