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首页> 外文期刊>Journal of Materials Chemistry, C. materials for optical and electronic devices >A high performance perovskite CH3NH3PbCl3 single crystal photodetector: benefiting from an evolutionary preparation process
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A high performance perovskite CH3NH3PbCl3 single crystal photodetector: benefiting from an evolutionary preparation process

机译：高性能Perovskite CH3NH3PBCL3单晶光电探测器：受益于进化制备过程

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摘要

Hybrid organic-inorganic lead halide perovskites (CH3NH3PbX3, X = Cl, Br, or I) are deemed to be the highest potential semiconducting materials due to their unique optoelectronic properties. Nowadays, most perovskite photodetectors are fabricated on the basis of thin films, and their performances are limited by the low carrier mobility and high trap density of the thin films. Herein, a high performance photodetector was fabricated via a method involving inversion temperature precision gradient crystallization (ITPGC) for the first time, which is an improvement on traditional methods. The structure of the bulk single crystal is confirmed via XRD and TEM characterization. Also, in terms of nucleation and growth theory, the growth mechanism is explained in detail and the best growth temperature is suggested to be 80 degrees C for the first time. Benefiting from this, a photodetector with ultra-high responsivity of 7.97 A W-1 is obtained, which is superior to thin film photodetectors. Also, a rise time of 1.27 ms and a fall time of 1.84 ms are obtained, which are regarded as pioneering values for this type of system. Meanwhile, the study also provides new ideas for the preparation of bulk single crystals.
机译：杂交有机 - 无机铅卤化物钙酸盐（CH3NH3PBX3，X = Cl，Br，Br，Br，Br，Br，Br，Br，Br，由于它们独特的光电性能而是最高的潜在半导体材料。如今，大多数钙钛矿光电探测器在薄膜的基础上制造，它们的性能受到薄膜的低载流子迁移率和高捕集密度的限制。这里，通过第一次涉及反转温度梯度结晶（ITPGC）的方法制造高性能光电探测器，这是对传统方法的改进。通过XRD和TEM表征确认散装单晶的结构。此外，就成核和生长理论而言，详细解释了生长机制，并且第一次提出了最佳的生长温度为80℃。受益于此，获得具有7.97A W-1的超高响应度的光电探测器，其优于薄膜光电探测器。此外，获得1.27ms的上升时间和1.84ms的下降时间，被认为是这种系统的开创性值。同时，该研究还为散装单晶的制备提供了新的思路。

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