利用射频磁控溅射在石英衬底上生长出铟磷共掺氧化锌薄膜(ZnO:In,P),所用靶材为掺杂五氧化二磷(P2O3)和氧化铟(In:O3)的氧化锌(ZnO)陶瓷靶,掺杂质量分数分别为1.5%和0.3%,溅射气体为Ar和O2的混合气体。原生ZnO薄膜是绝缘的,600℃退火5min后导电类型为n型,而800℃退火5min后为P型。P型ZnO薄膜的电阻率、载流子浓度和霍尔迁移率分别为12.4Ω·cm,1.6×10^17cm^-3和3.29cm^2·V^-1·s^-1。X射线衍射测量结果表明所有样品都只有(002)衍射峰,并与相同条件下生长的未掺杂ZnO相比向大角度方向偏移,意味着In和P都占据Zn位。XPS测试结果表明在共掺ZnO薄膜中P不是取代0而是取代Zn。因此,铟磷共掺ZnO薄膜中,In和P都取代Zn,并且PZn与2个锌空位(VZN)形成PZn-2VZn复合受主,薄膜表现为P型。
In, P codoped ZnO [ ZnO: (In, P) ] films were grown on quartz by radio frequency magnetron sputtering, the ZnO target was mixed with 1.5% P2O5 and 0.3% In2O3 ,and the mixing gas of Ar and O2 was used as the sputtering gas. The as-grown ZnO: (In,P) film shows insulating conduction, but n-type conductivity after annealing at 600 ℃ for 5 min, and p-type conduction after annealing at 800℃ for 5 min. The p-type ZnO: (In,P) has a resistivity of 12.4 Ω·cm, a cartier concentrativity of 1.6 × 10^17 cm^-3 and a Hall mobility of 3.29 cm^2·V^-1· s^-1. XRD measurement indicates that both the as-grown and annealed ZnO: (In,P) films have a preferred (002) orientation and larger (002) diffraction angles than that of undoped ZnO prepared at the same conditions, implying that both In and P occupy Zn site in the ZnO: (In,P). The XPS result confirm that the P substitutes Zn site (PZn) but not O site in the ZnO: (In,P). Therefore, it was suggested that both In and P substitute at Zn sites in the ZnO: (In,P) and the Pzn combines with two Zn vacancies( VZn ) to form a PZn-2VZn acceptor complex, which is responsible to p-type conductivity of the ZnO: (In,P).