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Flexible Ultrathin Single-Crystalline Perovskite Photodetector.
Nano Letters ( IF 9.6 ) Pub Date : 2020-09-17 , DOI: 10.1021/acs.nanolett.0c02468 Hao Jing 1 , Ruwen Peng 1 , Ren-Min Ma 2 , Jie He 1 , Yi Zhou 1 , Zhenqian Yang 2 , Cheng-Yao Li 1 , Yu Liu 1 , Xiaojiao Guo 3 , Yingying Zhu 1 , Di Wang 4 , Jing Su 5 , Cheng Sun 6 , Wenzhong Bao 3 , Mu Wang 1
Nano Letters ( IF 9.6 ) Pub Date : 2020-09-17 , DOI: 10.1021/acs.nanolett.0c02468 Hao Jing 1 , Ruwen Peng 1 , Ren-Min Ma 2 , Jie He 1 , Yi Zhou 1 , Zhenqian Yang 2 , Cheng-Yao Li 1 , Yu Liu 1 , Xiaojiao Guo 3 , Yingying Zhu 1 , Di Wang 4 , Jing Su 5 , Cheng Sun 6 , Wenzhong Bao 3 , Mu Wang 1
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Flexible optoelectronic devices attract considerable attention due to their prominent role in creating novel wearable apparatus for bionics, robotics, health care, and so forth. Although bulk single-crystalline perovskite-based materials are well-recognized for the high photoelectric conversion efficiency than the polycrystalline ones, their stiff and brittle nature unfortunately prohibits their application for flexible devices. Here, we introduce ultrathin single-crystalline perovskite film as the active layer and demonstrate a high-performance flexible photodetector with prevailing bending reliability. With a much-reduced thickness of 20 nm, the photodetector made of this ultrathin film can achieve a significantly increased responsivity as 5600A/W, 2 orders of magnitude higher than that of recently reported flexible perovskite photodetectors. The demonstrated 0.2 MHz 3 dB bandwidth further paves the way for high-speed photodetection. Notably, all its optoelectronic characteristics resume after being bent over thousands of times. These results manifest the great potential of single-crystalline perovskite ultrathin films for developing wearable and flexible optoelectronic devices.
中文翻译：
灵活的超薄单晶钙钛矿光电探测器。
柔性光电器件由于在创建用于仿生学，机器人技术，医疗保健等领域的新型可穿戴设备中的突出作用而备受关注。尽管基于块状单晶钙钛矿的材料比多晶材料具有更高的光电转换效率，但由于其坚硬和易碎的特性，不幸地限制了它们在柔性器件中的应用。在这里，我们介绍了超薄单晶钙钛矿膜作为活性层，并展示了一种具有出色弯曲可靠性的高性能柔性光电探测器。用厚度大大减少的20 nm，这种超薄薄膜制成的光电探测器可以实现5600A / W的显着提高的响应度，比最近报道的柔性钙钛矿光电探测器要高2个数量级。演示的0.2 MHz 3 dB带宽进一步为高速光电检测铺平了道路。值得注意的是，其所有的光电特性在弯曲了数千次之后都恢复了。这些结果表明，单晶钙钛矿超薄膜在开发可穿戴和柔性光电器件方面具有巨大潜力。
更新日期：2020-10-15
中文翻译：
灵活的超薄单晶钙钛矿光电探测器。
柔性光电器件由于在创建用于仿生学，机器人技术，医疗保健等领域的新型可穿戴设备中的突出作用而备受关注。尽管基于块状单晶钙钛矿的材料比多晶材料具有更高的光电转换效率，但由于其坚硬和易碎的特性，不幸地限制了它们在柔性器件中的应用。在这里，我们介绍了超薄单晶钙钛矿膜作为活性层，并展示了一种具有出色弯曲可靠性的高性能柔性光电探测器。用厚度大大减少的20 nm，这种超薄薄膜制成的光电探测器可以实现5600A / W的显着提高的响应度，比最近报道的柔性钙钛矿光电探测器要高2个数量级。演示的0.2 MHz 3 dB带宽进一步为高速光电检测铺平了道路。值得注意的是，其所有的光电特性在弯曲了数千次之后都恢复了。这些结果表明，单晶钙钛矿超薄膜在开发可穿戴和柔性光电器件方面具有巨大潜力。
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