- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Comprehensive Understanding and Controlling the Defect Structures: An Effective Approach for Organic-Inorganic Hybrid Perovskite-Based Solar-Cell Application
摘要： Understanding the defect structure in organic-inorganic hybrid perovskite material (OHP) is a crucial role to explain several physical properties such as material stability, energy band, carrier mobility, and so on. In the solar-cell applications using OHP, finding, understanding, and controlling defects is essential to making a more advanced device with high efficiency and stability. Naturally, we need to find, understand, and control the possible defects in OHP. However, the defect research field in OHP material is just beginning now. In this short review, we will explore the kinds of defects and their effects on OHP.
关键词： molecular defect,organic-inorganic hybrid perovskite,Schottky/Frankel defect,vacancy,delocalized defect,thin film,defect,solar-cell
更新于2025-09-23 15:21:21
-
Ultrafast and broadband photodetectors based on a perovskite/organic bulk heterojunction for large-dynamic-range imaging
摘要： Organic-inorganic hybrid perovskite (OIHP) photodetectors that simultaneously achieve an ultrafast response and high sensitivity in the near-infrared (NIR) region are prerequisites for expanding current monitoring, imaging, and optical communication capabilities. Herein, we demonstrate photodetectors constructed by OIHP and an organic bulk heterojunction (BHJ) consisting of a low-bandgap nonfullerene and polymer, which achieve broadband response spectra up to 1 μm with a highest external quantum efficiency of approximately 54% at 850 nm, an ultrafast response speed of 5.6 ns and a linear dynamic range (LDR) of 191 dB. High sensitivity, ultrafast speed and a large LDR are preeminent prerequisites for the practical application of photodetectors. Encouragingly, due to the high-dynamic-range imaging capacity, high-quality visible-NIR actual imaging is achieved by employing the OIHP photodetectors. We believe that state-of-the-art OIHP photodetectors can accelerate the translation of solution-processed photodetector applications from the laboratory to the imaging market.
关键词： Organic-inorganic hybrid perovskite,ultrafast response,photodetectors,high-dynamic-range imaging,broadband response,near-infrared
更新于2025-09-19 17:13:59
-
[IEEE 2018 15th IEEE India Council International Conference (INDICON) - Coimbatore, India (2018.12.16-2018.12.18)] 2018 15th IEEE India Council International Conference (INDICON) - Fabrication and Characterization of Organic-Inorganic Hybrid Perovskite CH <sub/>3</sub> NH <sub/>3</sub> PbI <sub/>3</sub> Based Metal-Semiconductor-Metal Photodetector
摘要： Organic-inorganic perovskite CH3NH3PbI3 is used for the fabrication of thin film photodetector, which is synthesized via the sol-gel chemical route. The prepared hybrid perovskite CH3NH3PbI3 thin film are characterized by X-ray diffraction (XRD), high resolution scanning electron microscope (HRSEM), photoluminescence. XRD result confirmed the formation of the tetragonal phase of CH3NH3PbI3 with crystallite size 15.7 nm. HRSEM image of hybrid perovskite CH3NH3PbI3 thin film confirmed the uniform distribution of particles and average particle size 30 nm. An efficient photoluminescence band is observed at 1.59 eV in hybrid perovskite CH3NH3PbI3 thin films at ambient temperature when excited with 405 nm wavelength light. Finally, the hybrid perovskite CH3NH3PbI3 thin film is investigated for electrical and optical response using fabricated metal-semiconductor-metal (MSM) photodetector.
关键词： Organic-inorganic hybrid perovskite,Responsivity,Metal-semiconductor-metal,Photodetector
更新于2025-09-19 17:13:59
-
Ultralong CH <sub/>3</sub> NH <sub/>3</sub> PbI <sub/>3</sub> nanowires synthesized by a ligand-assisted reprecipitation strategy for high-performance photodetectors
摘要： Organic-inorganic hybrid perovskite nanowires with well-defined structures have attracted considerable attention for optoelectronic applications. Perovskite nanowires integrated into practical optoelectronic devices are often hindered by the poor crystalline quality. Herein, a ligand-assisted reprecipitation strategy (LARP) is employed to prepare ultralong and freestanding CH3NH3PbI3 nanowires in large-scale. Oleylamine is adopted as an inhibitor, which can create a passivation layer on the surface of CH3NH3PbI3, to slow down the crystallization rate of CH3NH3PbI3 nanowire. With the low crystallization rate, several millimeters long and high-quality CH3NH3PbI3 nanowires with smooth surfaces can be synthesized in a large scale. Photodetectors fabricated on oleylamine assistant synthesized CH3NH3PbI3 nanowires exhibit high detectivity, which is five times higher than that of none oleylamine assistant synthesized CH3NH3PbI3 nanowires photoanode.
关键词： Organic-inorganic hybrid perovskite,photodetectors,nanowires,ligand-assisted reprecipitation strategy,optoelectronic applications,oleylamine
更新于2025-09-19 17:13:59
-
Enhancement of Open‐Circuit Voltage of Perovskite Solar Cells by Interfacial Modification with <i>p</i> ‐Aminobenzoic Acid
摘要： Various approaches of interface engineering are shown to be effective in improving the device performance of organic–inorganic hybrid perovskite solar cells (PSCs). The modification of the photoactive layer of PSC, CH3NH3PbI3 (MAPbI3), by spin-coating a layer of p-aminobenzoic acid (PABA), which can significantly enhance the open-circuit voltage (VOC), the fill factor (FF), and the power conversion efficiency (PCE) of PSCs, is herein reported. The champion device shows a short-circuit current ( JSC) of 22.83 mA cm?2, VOC of 1.167 V, FF of 0.768, and PCE of 20.47%. The improvement in photovoltaic performance is attributed to the suppression of carrier trap states and the improvement in the morphologies of perovskite films. This work demonstrates a simple and effective protocol to enhance the device performance, and provides an insight into the influence of PABA post-treatment on the charge carrier dynamics.
关键词： carrier dynamics,interface engineering,p-aminobenzoic acid,postdeposition treatment,organic–inorganic hybrid perovskite
更新于2025-09-11 14:15:04
-
The Cesium doping using the nonstoichiometric precursor for improved CH3NH3PbI3 perovskite films and solar cells in ambient air
摘要： Organic-inorganic hybrid perovskite solar cells have shown great prospect as a low-cost and high efficiency photovoltaic technology. The quality of the perovskite absorber layer is most critical to the performance of the device, and the stability remains one of the challenging issues. In this paper, the Cesium (Cs) doping perovskite film was prepared from nonstoichiometric precursor solution in ambient and humidity-controlled conditions. The results showed that the crystallinity, uniformity, absorption, Photo-luminescence intensity and the thermal stability of these films can be effectively improved compared with the films fabricated from stoichiometric one, which is attributed to the combined effect of the Cs doping and excess methylammonium cations passivation. Finally, the highest efficiency of the perovskite solar cells fabricated from nonstoichiometric solution reached to 14.1%, which is 12.8% higher than that of the control device from stoichiometric solution (12.5%). Furthermore, the device displayed the high stability and efficiency degradation of only 2% occurring over a period of 5 weeks in ambient air without encapsulation. This reported work provides a pathway for further improving the performance of perovskite solar cells with higher stability.
关键词： Nonstoichiometric solution,Cesium doping,Stability,Organic-inorganic hybrid perovskite solar cells
更新于2025-09-11 14:15:04