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中国物理学会期刊

非铅卤素钙钛矿及其阻变性能研究进展

CSTR: 32037.14.aps.70.20210065

Progress of lead-free perovskite and its resistance switching performance

CSTR: 32037.14.aps.70.20210065
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  • 近年来, 铅基卤素钙钛矿因其制备工艺简单、载流子扩散距离长以及离子迁移速率快等优点而被应用于阻变存储器. 然而, 铅基卤素钙钛矿结构中的铅对人类健康与环境保护存在威胁, 限制了铅基卤素钙钛矿在数据存储领域的实际应用. 研究者们针对铅基钙钛矿铅毒性的问题展开了一系列研究. 其中, 非铅卤素钙钛矿因不含铅而被认为是最有前景的下一代新型阻变存储介质材料. 最近几年, 锡基、铋基、锑基和铜基等非铅卤素钙钛矿被引入阻变存储器领域. 本文系统地综述了非铅卤素钙钛矿材料及其阻变性能, 归纳了非铅卤素钙钛矿的阻变性能及其阻变机理, 指出了非铅卤素钙钛矿材料应用于阻变存储器存在的关键问题, 为进一步研究非铅钙钛矿阻存储器提供了参考.

     

    With the rapid development of the information age, the demand for information storage capacity and miniaturization of memory units has been being increased. However, the commonly used silicon-based flash memory has nearly approached to its physical limit. The resistive switching random access memory (ReRAM) has become one of the promising candidates for the next-generation non-volatile memory due to its simple structure, fast operation speed, excellent flexibility, and long endurance. Recently, we witnessed that the lead halide perovskites, as hot star materials, have been widely used in optoelectronic fields owning to their advantages of low cost, excellent photoelectric properties, and solution process ability. Moreover, the lead halide perovskite has been successfully used as the active layer in ReRAM device because of its tunable bandgap, long charge carrier diffusion length, fast ion migration, and high charge carrier mobility. Whereas the toxicity of lead in halide perovskite is a very horrible problem in lead halide perovskite-based ReRAM devices. The lead-free halide perovskite is considered to be the most promising material for perovskite-based ReRAM devices because it does not contain lead element. Most recently, a large number of scientists from different groups have begun to study lead-free perovskite-based ReRAM devices. For example, tin, bismuth, antimony, and copper-based halide perovskite materials have been utilized in ReRAM devices and exhibited excellent resistance switching (RS) performances. Here in this paper, the recent development of lead-free perovskite and its RS performance are reviewed, including lead-free halide perovskite materials, RS performances, and RS mechanisms of lead-free perovskite-based ReRAM. Finally, the key problems and development prospects of lead-free perovskite-based ReRAM are also presented, which provides a fundamental step towards developing the RS performance based on lead-free halide perovskites.

     

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