Direct Vapor Growth of Perovskite CsPbBr3 Nanoplate Electroluminescence Devices
Direct Vapor Growth of Perovskite CsPbBr3 Nanoplate Electroluminescence Devices
复制标题
钙钛矿 CsPbBr3 纳米板电致发光器件的直接气相生长
DOI：
10.1021/acsnano.7b03660
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发表时间：
2017-10-01
期刊：
影响因子：
17.1
通讯作者：
Pan, Anlian
中科院分区：
文献类型：
--
作者：
Hu, Xuelu;Zhou, Hong;Pan, Anlian
金属卤化物钙钛矿纳米结构由于其优异的光电性能，作为集成光子学的纳米级光源具有很大的前景。然而，使用传统的光刻方法制造卤化物钙钛矿纳米器件仍然是一个巨大的挑战，因为卤化物钙钛矿可以溶解在传统器件制造过程中所需的极性溶剂中。在此，我们报告单CsPbBr 3，纳米板电致发光（EL）器件制造的直接生长CsPbBr 3纳米板上预图案化的氧化铟锡（ITO）电极通过。气相沉积。明亮的EL发生在靠近负偏压接触的区域中，具有类似于3V的开启电压，22 nm的窄的半峰全宽，以及类似于0.2%的外量子效率。此外，通过扫描光电流显微镜和表面静电势的测量，我们发现，形成ITO/p型CsPbBr 3肖特基势垒与高效的载流子注入是必不可少的实现EL。ITO/p型CsPbBr 3肖特基二极管的形成也通过相应的晶体管特性得到证实。由直接生长的钙钛矿纳米结构实现的EL纳米器件的实现可以在片上集成光子电路和系统中找到应用。
Metal halide perovskite nanostructures hold great promises as nanoscale light sources for integrated photonics due to their excellent optoelectronic properties. However, it remains a great challenge to fabricate halide perovskite nanodevices using traditional lithographic methods because the halide perovskites can be dissolved in polar solvents that are required in the traditional device fabrication process. Herein, we report single CsPbBr3, nanoplate electroluminescence (EL) devices fabricated by directly growing CsPbBr3 nanoplates on prepatterned indium tin oxide (ITO) electrodes via.a vapor-phase deposition. Bright EL occurs in the region near the negatively biased contact, with a turn-on voltage of similar to 3 V, a narrow full width at half maximum of 22 nm, and an external quantum efficiency of similar to 0.2%. Moreover, through scanning photo current microscopy and surface electrostatic potential measurements, we found that the formation of ITO/p-type CsPbBr3 Schottky barriers with highly efficient carrier injection is essential in realizing the EL. The formation of the ITO/p-type CsPbBr3 Schottky diode is also confirmed by the corresponding transistor characteristics. The achievement of EL nanodevices enabled by directly grown perovskite nanostructures could find applications in on-chip integrated photonics circuits and systems.