First-principles investigation of lead-free double perovskites Cs 2 NaGaX 6 (X = F, Cl, and Br) for optoelectronic applications

Sudip Dey Dipta^a, Jahirul Islam^a✉, Soumaya Gouadria^b, Shahid Ahmad^a, Ali El‐Rayyes^c, Md Saiduzzaman^a✉

1. ^aDepartment of Materials Science and Engineering, Khulna University of Engineering and Technology, Khulna 9203, Bangladesh
2. ^bDepartment of Physics, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, 11671, Riyadh, Saudi Arabia
3. ^cCenter for Scientific Research and Entrepreneurship, Northern Border University, Arar, 73213, Saudi Arabia
4. ✉Corresponding author