Before revision: Ultimate efficiency Since the highest energy that can possibly be extracted from a single EHP is the bandgap energy, the ultimate efficiency of a beta-battery can be estimated as: where and are semiconductor band gap and electron-hole pair creation eneregy respectively.
After revision: Ultimate efficiency Since the highest energy that can possibly be extracted from a single EHP is the bandgap energy, the ultimate efficiency of a beta-battery can be estimated as: where and are semiconductor band gap and electron-hole pair creation energy respectively.