Respected Researchers.

I hope all of you are fine and doing well. I am trying to find out solar power conversion efficiency (PCE) by using VASP. I am confuse about the numerical values of integral part mentioned in red color rectangle, that from where and how we can get these parameters (h-bar or hcut) values. If it's possible please guide me in this problem.

Thanks in advance

Sincerely,

Dildar Ahmed

USTC China