Solution‐Processed High‐Performance Hybrid Photodetectors Enhanced by Perovskite/MoS2 Bulk Heterojunction,Advanced Materials Interfaces

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Solution‐Processed High‐Performance Hybrid Photodetectors Enhanced by Perovskite/MoS2 Bulk Heterojunction
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2018-06-12 , DOI: 10.1002/admi.201800505
Zi-Yu Peng ₁ , Jian-Long Xu ₁ , Jing-Yue Zhang ₁ , Xu Gao ₁ , Sui-Dong Wang ₁

Affiliation

A hybrid structure strategy, utilizing a perovskite/MoS₂ bulk heterojunction (BHJ) as the photosensitizer and a reduced graphene oxide (rGO) layer as the conducting channel, is developed to realize high‐performance photodetectors. All the active layers are prepared by a simple and low‐cost solution process. The perovskite/MoS₂ BHJ can significantly suppress the recombination of photogenerated carriers due to the selective electron trapping in the MoS₂ nanoflakes, and thus the photoinduced hole transfer from perovskite to rGO is facilitated to largely increase the photocurrent. The hybrid photodetectors show excellent figures of merit, such as high responsivity of 1.08 × 10⁴ A W⁻¹, high detectivity of 4.28 × 10¹³ Jones, high external quantum efficiency of 2.0 × 10⁶%, and fast photoresponse time less than 45 ms. The demonstration of flexible photodetectors on a flexible substrate finds potential applications in wearable and portable electronics. This work highlights the significance of a hybrid structure, combining an appropriate BHJ film with a graphene channel, as a general and effective way for achieving low‐cost and high‐performance photodetectors.

中文翻译：

钙钛矿/ MoS2本体异质结增强型解决方案处理的高性能混合光电探测器

开发了一种混合结构策略，该方法利用钙钛矿/ MoS ₂本体异质结（BHJ）作为光敏剂和还原型氧化石墨烯（rGO）层作为导电通道，以实现高性能的光电探测器。所有有源层都是通过简单且低成本的解决方案过程准备的。钙钛矿/ MoS ₂ BHJ可以显着抑制由于MoS ₂纳米薄片中的选择性电子俘获而引起的光生载流子的重组，因此促进了从钙钛矿到rGO的光致空穴转移，从而大大增加了光电流。混合光电探测器显示出优异的品质因数，例如1.08×10 ⁴ AW ^-1的高响应度，具有4.28×10 ¹³ Jones的高探测灵敏度，具有2.0×10 ⁶％的高外部量子效率，以及小于45 ms的快速光响应时间。柔性基板上的柔性光电探测器的演示发现了可穿戴和便携式电子产品的潜在应用。这项工作强调了混合结构的重要性，该结构将适当的BHJ膜与石墨烯通道相结合，是实现低成本和高性能光电探测器的通用且有效的方法。

更新日期：2018-06-12

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