利用二元和三元氧化物覆盖层提高新一代钙钛矿基透明导电氧化物的长期稳定性
Improving the long-term stability of new-generation perovskite-based TCO using binary and ternary oxides capping layers
AI总结：
本文研究在钙钛矿SrVO3透明导电氧化物上原位生长二元和三元氧化物覆盖层以提升热稳定性，发现非晶LaAlO3保护效果最佳，可兼顾电学与光学性能并抑制老化。
摘要：
我们报告了覆盖层对钒酸盐基透明导电氧化物（TCOs）的影响，目的是在空气环境中热处理时延长其热稳定性，同时将电阻率的损失降至最低。在本研究中，使用脉冲激光沉积（PLD）在多晶钙钛矿SrVO3（SVO）薄膜上原位生长了多种保护层，包括非晶Al2O3、LaAlO3（LAO）、在基础压力下生长的TiO2以及在氧分压下沉积的TiO2。结果表明，在这些氧化物层中，非晶LaAlO3是最有前景的保护层，能够同时保护钙钛矿SVO薄膜的电学和光学性能，使其免受自然老化和人工老化的影响。我们目前在SVO上施加覆盖层的方法有望解决关联TCOs的长期稳定性问题，并为未来氧化物电子学应用开辟机会。
英文摘要：
We report the impact of capping layers on vanadate based transparent conductive oxides (TCOs) to prolong the thermal stability with a minimal loss of resistivity during heat treatment in ambient environment. In the present study, various protecting layers (amorphous Al2O3, LaAlO3 (LAO), TiO2 grown in base pressure and TiO2 deposited under oxygen partial pressure) are grown in-situ on polycrystalline perovskite SrVO3 (SVO) thin films using Pulsed Laser Deposition (PLD). The results show that amorphous LaAlO3 is the most promising protection layer among the oxide layers, to preserve both electrical and optical properties of perovskite SVO films from natural as well as artificial aging. Our present approach for a capping layer on SVO may address the long-term stability issues of correlated TCOs and would open an opportunity for the future oxide electronics applications.
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