Xian Zhang's research while affiliated with Hebei University of Technology and other places
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Publications (9)
2D Ruddlesden–Popper (RP) layered metal‐halide perovskites have garnered significant interest due to their unique photoelectric properties and excellent stability. However, 2D perovskite films prepared via solution process generally exhibit multi‐quantum well structure with random well width distribution, which significantly impedes the carrier tra...
Formamidinium lead iodide (FAPbI3) has received substantial research interest for photovoltaic applications due to its excellent thermal stability and a narrow bandgap close to the Shockley-Queisser limit. Unfortunately, the compositional-pure...
Lead‐free 2D antimony‐based halide perovskites with excellent optoelectronic properties, low toxicity, and good intrinsic stability are promising for photovoltaic devices. However, the power conversion efficiency (PCE) of antimony‐based perovskite solar cells (PSCs) is still lower than 3% due to the poor crystallinity and random orientation. Herein...
Organic–inorganic perovskite photodetectors have drawn great attention due to their excellent performance and simple fabrication process. However, the detectivity of perovskite ultraviolet photodetectors (UV‐PDs) is comparatively poor because of the high defect density in chlorine‐containing 3D perovskites. Furthermore, 3D perovskites are easily de...
Hole transport layer (HTL)‐free carbon electrode‐based perovskite solar cells (C‐PSCs) have drawn great attention due to their excellent stability and simple fabrication process. However, the photovoltaic parameters of C‐PSCs usually exhibit large negative temperature coefficients (TCs). Herein, the TCs of C‐PSCs can be suppressed by enhancing elec...
Owing to the significant roles in balancing carrier transport, bandgap alignment, and perovskite crystallization, realizing high-quality electron transport layers (ETLs) and their effective electronic contact with the perovskite photoactive layer is crucial for future commercialization of perovskite solar cells (PSCs). Here, a high-quality SnO2 ETL...
The nonradiative recombination losses resulting from the trap states at the surface and grain boundaries directly hinder the further enhancement of power conversion efficiency (PCE) and stability of perovskite solar cells. Consequently, it is highly desirable to suppress nonradiative recombination through modulating perovskite crystallization and p...
Citations
... From the XRD patterns, we note that the signals corresponding to (110), (111) and (210) planes were considerably weaker than theoretical strengths of powder diffraction patterns. This result implies a potentially high orientational preference within our samples [37]. To further reveal the crystal structure and orientation of the perovskite film, we conducted GIWAXS measurements. ...
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... In addition, 2D perovskite is focused in PDs field [98] due to ultrahigh resistivity, appropriate bandgap and increased stability. Han et al. chose PMA + as the interlayer ion for the preparation Fig. 15 a I-V curves under different UV power, b dependence of photocurrent on light intensity, c photo-response properties of the PDs, d response and recovery time [91] of 2D perovskite films, and prepared high-quality quasi-2D Ruddlesden-Popper chalcogenides [99]. This facilitates the reduction of the dark current of the device, as is plotted in Fig. 16b-g. ...
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... The improvement in efficiency and stability of R2 could be attributed to the following: long-chain polymers form a network among perovskite grains, enhancing film morphology and stability [43]. Polymer passivates perovskite grain surfaces, reducing trap-state density and improving charge transport [44]. It is shown in Fig. S4a. ...
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