| Title |
Growth and optical properties of undoped and Co-doped CdS single crystals |
| Authors |
오금곤(Oh, Gum-kon) ; 김남오(Kim, Nam-oh) ; 김형곤(Kim, Hyung-gon) ; 현승철(Hyun, Seung-cheol) ; 박현(Park, hjung) ; 오석균(Oh, Seok-kyun) |
| Keywords |
optical energy band gap ; optical absorption ; electron transitions ; CTR method |
| Abstract |
CdS and CdS:Co^{2+} single crystals were grown by CTR method using iodine as transport material. The grown single crystals have defect chalcopyrite structure with direct band gap. The optical energy band gap was decreased according to add of Co-impurity. We can observed the Co-impurity optical absorption peaks assigned to the Co^{2+} ion sited at the T_d symmetry lattice and we consider that they were attributed to the electron transitions between energy levels of ions. |