Laser printed metal halide perovskites
Laser printed metal halide perovskites
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DOI：
10.1088/2515-7639/ab9aac
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发表时间：
2020-06
期刊：
影响因子：
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通讯作者：
Colin Tyznik;Zachary A. Lamport;Jeni C. Sorli;David Becker-Koch;Y. Vaynzof;Y. Loo;O. Jurchescu
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文献类型：
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作者：
Colin Tyznik;Zachary A. Lamport;Jeni C. Sorli;David Becker-Koch;Y. Vaynzof;Y. Loo;O. Jurchescu
混合的有机-无机钙钛矿可以通过溶液加工以低成本生产半导体器件。其卓越的结构多功能性提供了独特而多样的物理特性，使其具有广泛的应用。一个主要的限制是与开发钙钛矿设备相关的重大负面环境影响；钙钛矿薄膜沉积中使用的常见溶剂是剧毒的，这是钙钛矿技术向工业环境转移的一个障碍。本文报道了第一个激光打印的有机-无机钙钛矿薄膜的制备和表征。该方法无溶剂，可扩展且成本低，可以在大面积上快速沉积，并且材料浪费最少。我们发现激光打印的钙钛矿薄膜是结晶的，并表现出与单晶相当的电学性能，尽管其微观结构由随机取向的晶体组成。印刷过程中使用的碳粉是为最佳的薄膜转移而设计的，其组件的垂直分离导致钙钛矿薄膜在堆叠中间的分离，因此也封装了钙钛矿层，这一过程在环境暴露时产生了显著的缺陷形成弹性。
Hybrid organic–inorganic perovskites enable the production of semiconductor devices at low cost from solution processing. Their remarkable structural versatility offers unique and diverse physical properties, leading to their incorporation in a wide variety of applications. One major limitation is the significant negative environmental impact associated with developing perovskite devices; common solvents used in perovskite film deposition are highly toxic, which represents a barrier to the transfer to an industrial setting of the perovskite technology. Here we report on the fabrication and characterisation of the first laser printed organic–inorganic perovskite films. The method is solvent-free, scalable and low-cost, allowing fast deposition over large areas and with minimal material waste. We show that the laser printed perovskite films are crystalline and exhibit electrical properties on par with single crystals, despite the fact that the microstructure consists of randomly oriented crystallites. The toner used during printing is designed for optimal film transfer and the vertical separation of its components results in a segregation of the perovskite film in the middle of the stack, therefore also encapsulating the perovskite layer, a process that yields a remarkable resilience to defect formation upon environmental exposure.