Sami W, Yassir A. Study on The Effect of Annealing On The Optical Properties of The Pure Lead Sulfide (PbS) Films and Doping by Copper. QJPS [Internet]. 2017Aug.1 [cited 2024May8];19(4):42-9. Available from: https://journalsc.qu.edu.iq/index.php/JOPS/article/view/284