Author:
Chen 陈 Xingqian 兴谦,Li 李 Haozhen 昊臻,Chen 陈 Wei 伟,Mei 梅 Zengxia 增霞,Azarov Alexander,Kuznetsov Andrej,Du 杜 Xiaolong 小龙
Abstract
SnO2 films exhibit significant potential as cost-effective and high electron mobility substitutes for In2O3 films. In this study, Li is incorporated into the interstitial site of the SnO2 lattice resulting in an exceptionally low resistivity of 2.028 × 10−3 Ω⋅cm along with a high carrier concentration of 1.398 × 1020 cm−3 and carrier mobility of 22.02 cm2/V⋅s. Intriguingly, Li
i
readily forms in amorphous structures but faces challenges in crystalline formations. Furthermore, it has been experimentally confirmed that Li
i
acts as a shallow donor in SnO2 with an ionization energy ΔE
D1 of −0.4 eV, indicating spontaneous occurrence of Li
i
ionization.