List of Articles Yagub Sefidgar Article 1 - Enhancing Efficiency of Two-bond Solar Cells Based on GaAs/InGaP 20.1001.1.24237361.2019.4.2.7.7 Yagub Sefidgar Hassan Rasooli Saghai Hamed Ghatei Khiabani Azar Journal of Optoelectronical Nanostructures , Issue 13 , Year , Summer 2019