论文标题
大规模无机钙钛矿的精确相控制，通过蒸气 - 交换策略
Precise phase control of large-scale inorganic perovskites via vapor-phase anion-exchange strategy
论文作者
论文摘要
Anion Exchange在相位控制，组成工程和光电属性调整方面具有极高的灵活性和高精度。不同于以前的液体溶液中成功的阴离子交换过程，我们在此开发了一种蒸气 - 阴离子 - 交换策略，以实现通过使用气体注入周期来实现大规模无机钙蛋白酶的精确相位和带隙控制，从而产生了一些perovskites，例如CSPBCL3，例如CSPBCL3，而CSPBCL3在薄膜形态中从未被报道过。 AB-Initio计算还提供了有见地的机制，以了解阴离子交换对调整电子特性并优化结构稳定性的影响。此外，由于对特定原子浓度的精确控制，可以观察到有趣的可调光照明，并且可以通过1 nm的超高光谱分辨率准确地实现具有从绿色到紫外线的可调光响应边缘的光电遗传学。因此，我们为无机钙钛矿提供了一种新的通用蒸气阴离子交换方法，具有微调光电特性。
Anion exchange offers great flexibility and high precision in phase control, compositional engineering and optoelectronic property tuning. Different from previous successful anion exchange process in liquid solution, herein, we develop a vapor-phase anion-exchange strategy to realize the precise phase and bandgap control of large-scale inorganic perovskites by using gas injection cycle, produing some perovskites such as CsPbCl3 which has never been reported in thin film morphology. Ab-initio calculations also provide the insightful mechanism to understand the impact of anion exchange on tuning the electronic properties and optimizing the structural stability. Furthermore, because of precise control of specific atomic concentrations, intriguing tunable photoluminsecence is observed and photodetectors with tunable photoresponse edge from green to ultraviolet light can be realized accurately with an ultrahigh spectral resolution of 1 nm. Therefore, we offer a new, universal vapor-phase anion exchange method for inorganic perovskite with fine-tunable optoelectronic properties.
