Photodetector Based on Spontaneously Grown Strongly Coupled MAPbBr3/N-rGO Hybrids Showing Enhanced Performance
| Autor: | Mingli Liang, Tõnu Pullerits, Xianshao Zou, Yingying Tang, Kaibo Zheng, Qijin Chi, Alireza Honarfar, Mohamed Abdellah, Minwei Zhang |
|---|---|
| Přispěvatelé: | Hard Condensed Matter (WZI, IoP, FNWI), IoP (FNWI) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
business.industry Photodetector 02 engineering and technology Photodetection Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Rectangular potential barrier Optoelectronics General Materials Science Quantum efficiency Charge carrier 0210 nano-technology business Hybrid material Perovskite (structure) |
| Zdroj: | ACS Applied Materials and Interfaces, 12(1), 858-867. American Chemical Society |
| ISSN: | 1944-8244 |
| Popis: | Recently, metal-halide perovskites have emerged as a candidate for optoelectronic applications such as photodetectors. However, the poor device performance and instability have limited their future commercialization. Herein, we report the spontaneous growth of perovskite/N-rGO hybrid structures using a facile solution method and their applications for photodetectors. In the hybrid structures, perovskites were homogeneously wrapped by N-rGO sheets through strong hydrogen bonding. The strongly coupled N-rGOs facilitate the charge carrier transportation across the perovskite crystals but also distort the surface lattice of the perovskite creating a potential barrier for charge transfer. We optimize the addition of N-rGO in the hybrid structures to balance interfacial structural distortion and the intercrystal conductivity. High-performance photodetection up to 3 × 104 A/W, external quantum efficiency exceeding 105%, and detectivity up to 1012 Jones were achieved in the optimal device with the weight ratio between perovskites and N-rGO to be 8:1.5. The underlying mechanism behind the optimal N-rGO addition ratio in the hybrids has also been rationalized via time-resolved spectroscopic studies as a reference for future applications. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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