Improving electrical conductivity and its thermal stability of Al-doped ZnO polycrystalline films using ultrathin Al film as a passivation layer

Aluminum-doped ZnO (AZO) has been considered as a prospective material for application as transparent electrodes in solar cells. In this application, an improvement of the Hall mobility is desired to achieve the high conductivity, because an increase in the carrier concentration results in a decrease in transmission at near-infrared wavelengths. However, the achievement of high Hall mobility is still a challenge. Another challenge associated...